Geography

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The use of spatial analysis and participatory approaches in strategic environmental assessment (SEA) : identifying and predicting the ecological impacts of development on the KwaZulu-Natal North Coast of South Africa.
(2010) Ahmed, Fathima.; Bob, Urmilla.; Ahmed, Fethi B.
The high pressures for coastal development, translated as prolific land cover transformation, coupled with the weaknesses of management to protect the environment has led to the gradual deterioration of environmental conditions in many coastal areas. Land use decisions in coastal areas are based on opportunities and constraints affected by both biophysical and socio-economic drivers, and hence present one of the main issues integrating the large debate on sustainable development in coastal zones (Lourenço and Machado, 2007: 1). The aim of this study is to investigate the effectiveness of the integration of spatial analysis and participatory approaches in SEA (particularly its ability to identify and predict ecological impacts) on the KwaZulu-Natal north coast of South Africa. The study adopted a conceptual framework based on landscape ecology, which was underpinned within the overarching political ecology framework. The former underscores the importance of integration, while the latter critiques the institutionalization of environmental concerns, which are characterized by inequalities in terms of social and political power and of how problems are defined, mediated and resolved. Hence this conceptual framework was considered appropriate to assess the strategic environmental issues pertaining to the coastal zone on the KwaZulu-Natal north coast. The researcher used participatory methods, primarily focus group discussions (which included venn diagramming, ranking exercises and participatory mapping) which were triangulated with both quantitative and qualitative methods as part of an integrated impact assessment. These relate to the use of semistructured questionnaires which were administered to a purposive sample of six key stakeholder interest groups within the study area. A spatial GIS time series analysis of land use and cover change was employed to determine baseline conditions, changes in the state of key ecosystems, key development drivers and emerging threats. Additionally, a policy and institutional review was undertaken. The analysis revealed that major natural land cover classes are in decline in the study area,within a time period of less than 10 years. The most sensitive ecosystems were found to be grasslands (-19.99%), coastal forest (-40%), wetlands (-37.49%) and secondary dunes (- 21.44%). Furthermore, agriculture and forestry are also indicating severe declines. The reasons attributed to this transformation of land cover are increasingly being linked with economic motives such as individual private land-owner dynamics, tourism growth and development in the area. Furthermore, the policy agendas are clearly economically motivated. These losses signify the cumulative decline in ecosystem goods and services, and could undermine pose risks to the society that relies on them either directly or indirectly. One of the main considerations in this research endeavor was to formulate a Strategic Environmental Assessment (SEA) Framework to inform future ICZM in the study area. SEA is planning with a long-term perspective, with a focus on a spatial rather than a project level, an element that is clearly lacking in the current development scenario of this coastline. It is critical that the SEA Framework advocated in this study include a range of variables that will permit short-term, medium-term and long-term monitoring and evaluation aimed at ensuring sustainable planning in the area.
Globalisation, development and community-based tourism in developing countries : a case study of Pondonland, Eastern Cape.
(2010) Giampiccoli, Andrea.; Moodley, Vadivelu.; Brooks, Shirley.
Contemporary globalisation in developing countries is circumscribed by neo-liberal development approaches, while community-based development seeks to create alternative development strategies. This thesis brings together research in tourism with theoretical perspectives from Gramscian social analysis in order to explore contemporary conflict between these two strategies in the tourism sector. The purpose is to investigate the influence the hegemonic global milieu has exerted on an alternative community-based tourism (CBT) strategy that was initially formally/institutionally supported. Concepts of hegemony, globalisation and divergence/convergence, together with development theories, are explored and applied to the international tourism sector and CBT in particular. A theoretical structure is proposed in which the relationships between hegemony, globalisation, and processes of divergence/convergence are explicated in relation to the tourism sector, and CBT in particular. Global-local linkages, conceptualised in terms of the theoretical framework, are explored in a particular geographical context, namely the Pondoland coast of South Africa. South Africa has recently rejoined the global socio-economic milieu after the isolation of the apartheid period and a European Union-supported tourism project in the Pondoland region is studied in detail. The case study serves to empirically substantiate the proposed theoretical framework. The investigation contributes to ‘initiate’ a global – local oriented paradigm in tourism study that focuses on the relationship between globalisation processes and a CBT development approach by exploiting and conjoining the correlation of the concepts of the proposed theoretical framework. Globalisation processes are set against a specific and local form of tourism, i.e. community-based tourism. The proposition is a ‘new’ double level of interlinkage. General and global policies are interlinked and cross each other with specific and local policies to evaluate a CBT project outcome. The study intends to go beyond existing literature of CBT management and project development. This is achieved by providing an investigation on the ‘unseen’ working mechanisms and influence of globalisation processes in relation to a specific CBT local project supported by a global actor in international cooperation, thus verifying interpretations and commitment on CBT development approaches. The case study findings elucidate and highlight the final effects of the theoretical proposition at a practical level by clarifying and showing the level of influence on, and re-adjustment of, the case study end result in comparison with its initial plan. A shift in the case study project development is individuated and commented on in relation to the proposed theoretical framework. The investigation results allow validating the proposed conceptual basis of the study. Based on the findings, this thesis a proposal is made to construct the interrelationship between development and CBT understanding. A typology and specific nomenclature of CBT approaches is advanced together with their correlation to development concepts. The conclusion also gives further general and specific recommendations by providing possible strategies to permit proper development and better exploitation of CBT possibilities.
Field spectroscopy of plant water content in Eucalyptus grandis forest stands in KwaZulu-Natal, South Africa
(2008) Oumar, Zakariyyaa.
The measurement of plant water content is essential to assess stress and disturbance in forest plantations. Traditional techniques to assess plant water content are costly, time consuming and spatially restrictive. Remote sensing techniques offer the alternative of a non destructive and instantaneous method of assessing plant water content over large spatial scales where ground measurements would be impossible on a regular basis. The aim of this research was to assess the relationship between plant water content and reflectance data in Eucalyptus grandis forest stands in KwaZulu-Natal, South Africa. Field reflectance and first derivative reflectance data were correlated with plant water content. The first derivative reflectance performed better than the field reflectance data in estimating plant water content with high correlations in the visible and mid-infrared portions of the electromagnetic spectrum. Several reflectance indices were also tested to evaluate their effectiveness in estimating plant water content and were compared to the red edge position. The red edge position calculated from the first derivative reflectance and from the linear four-point interpolation method performed better than all the water indices tested. It was therefore concluded that the red edge position can be used in association with other water indices as a stable spectral parameter to estimate plant water content on hyperspectral data. The South African satellite SumbandilaSat is due for launch in the near future and it is essential to test the utility of this satellite in estimating plant water content, a study which has not been done before. The field reflectance data from this study was resampled to the SumbandilaSat band settings and was put into a neural network to test its potential in estimating plant water content. The integrated approach involving neural networks and the resampled field spectral data successfully predicted plant water content with a correlation coefficient of 0.74 and a root mean square error (RMSE) of 1.41 on an independent test dataset outperforming the traditional multiple regression method of estimation. The potential of the SumbandilaSat wavebands to estimate plant water content was tested using a sensitivity analysis. The results from the sensitivity analysis indicated that the xanthophyll, blue and near infrared wavebands are the three most important wavebands used by the neural network in estimating plant water content. It was therefore concluded that these three bands of the SumbandilaSat are essential for plant water estimation. In general this study showed the potential of up-scaling field spectral data to the SumbandilaSat, the second South African satellite scheduled for launch in the near future.
Remote sensing of forest health : the detection and mapping of Pinus patula trees infested by Sirex noctilio.
(2008) Ismail, Riyad Abdool Hak.; Mutanga, Onisimo.; Bob, Urmilla.
Sirex noctilio is causing considerable mortality in commercial pine forests in KwaZulu- Natal, South Africa. The ability to remotely detect S. noctilio infestations remains crucial for monitoring the spread of the wasp and for the effective deployment of suppression activities. This thesis advocates the development of techniques based on remote sensing technology to accurately detect and map S. noctilio infestations. To date, no research has examined the potential of remote sensing technologies for the detection and mapping of Pinus patula trees infested by S. noctilio. In the first part of this thesis, the focus was on whether high spatial resolution imagery could characterize S. noctilio induced stress in P. patula forests. Results showed that, the normalized difference vegetation index derived from high spatial resolution imagery has the potential to accurately detect and map the later stages of S. noctilio infestations. Additionally, operational guidelines for the optimal spatial resolutions that are suitable for detecting and mapping varying levels of sustained S. noctilio mortality were defined. Results showed that a pixel size of 2.3 m is recommended to detect high (11-15%) infestation levels, and a pixel size of 1.75 m is recommended for detecting low to medium infestation levels (1-10%). In the second part of this thesis, the focus was on the ability of high spectral resolution (hyperspectral) data to discriminate between healthy trees and the early stages of S. noctilio infestation. Results showed that specific wavelengths located in the visible and near infrared region have the greatest potential for discriminating between healthy trees and the early stages of S. noctilio infestation. The researcher also evaluated the robustness and accuracy of various machine learning algorithms in identifying spectral parameters that allowed for the successful detection of S. noctilio infestations. Results showed that the random forest algorithm simplified the process by identifying the minimum number of spectral parameters that provided the best overall accuracies. In the final part of this thesis spatial modelling techniques were used to proactively identify pine forests that are highly susceptible to S. noctilio infestations. For the first time the random forest algorithm was used in conjunction with geographic information systems for mapping pine forests that are susceptible to S. noctilio infestations. Overall, there is a high probability of S. noctilio infestation for the majority (63%) of pine forest plantations located in Mpumalanga, South Africa. Compared to previous studies, the random forest model identified highly susceptible pine forests at a more regional scale and provided an understanding of localized variations of environmental conditions in relation to the distribution of the wasps.
The estimation of Eucalyptus plantation forest structural attributes using medium and high spatial resolution satellite imagery.
(2008) Gebreslasie, Michael Teweldemedhin.; Ahmed, Fethi B.; van Aardt, Jan.
Sustaining the socioeconomic and ecological benefits of South African plantation forests is challenging. A more systematic and rapid forest inventory system is required by forest managers. This study investigates the utility of medium (ASTER 15 m) and high (IKONOS 1-4 m) spatial resolution satellite imageries in an effort to improve the remote capture of structural attributes of even-aged Eucalyptus plantations grown in the warm temperate climatic zone of southern KwaZulu-Natal, South Africa. The conversion of image data to surface reflectance is a pre-requisite for the establishment of relationships between satellite remote sensing data and ground collected forest structural data. In this study image-based atmospheric correction methods applied on ASTER and IKONOS imagery were evaluated for the purpose of retrieving surface reflectance of plantation forests. Multiple linear regression and canonical correlation analyses were used to develop models for the prediction of plantation forest structural attributes from ASTER data. Artificial neural networks and multiple linear regression were also used to develop models for the assessment of plantation forests structural attributes from IKONOS data. The plantation forest structural attributes considered in this study included: stems per hectare, diameter at breast height, mean tree height, basal area, and volume. In addition, location based stems per hectare were determined using high spatial resolution panchromatic IKONOS data where variable and fixed window sizes of local maxima were employed. The image-based dark object subtraction (DOS) model was better suited for atmospheric correction of ASTER and IKONOS imagery of the study area. The medium spatial resolution data were not amenable to estimating even-aged Eucalyptus forest structural attributes. It is still encouraging that up to 64 % of variation could be explained by using medium spatial resolution data. The results from high spatial resolution data showed a promising result where the ARMSE% values obtained for stems per hectare, diameter at breast height, tree height, basal area and volume are 7.9, 5.1, 5.8, 8.7 and 8.7, respectively. Results such as these bode well for the application of high spatial resolution imagery to forest structural assessment. The results from the location based estimation of stems per hectare illustrated that a variable window size approach developed in this study is highly accurate. The overall accuracy using a variable window size was 85% (RMSE of 189 trees per hectare). The overall findings presented in this study are encouraging and show that high spatial resolution imagery was successful in predicting even-aged Eucalyptus forest structural attributes in the warm temperate climates of South Africa, with acceptable accuracy.
Spatial and temporal extent of land degradation in a communal landscape of KwaZulu-Natal, South Africa.
(2009) Bangamwabo, Victor Mugabo.
Land degradation in communal rangelands is one of the problems that lowers land
An assessment of resident and business perceptions of the 2010 FIFA World Cup (WC) stadium development in the eThekwini Municipality, KwaZulu-Natal, South Africa.
(2010) Dasarath, Aradhana.
Landcover classification in a heterogenous savanna environment : investigating the performance of an artificial neural network and the effect of image resolution.
(2007) Allan, Keagan.; Mutanga, Onisimo.
The aim of this study was to investigate the role of spatial and categorical resolution of satellite images in landcover classification. Three images namely, SPOT 5, Landsat TM, and MODIS were used, each of varying spatial resolution. Landcover classes were chosen for each of the classifications, were placed into groups of 11, and then merged to 8. This was to evaluate the effect that the categorical resolution plays on the final classification algorithm. Three traditional classifiers were used to create landcover maps. It was found that the higher resolution imagery produced higher accuracies at the 11 class level and these accuracies were improved by reducing the number of classes to 8. The coarser resolution imagery was able to classify larger features more accurately than the smaller features. This allowed the conclusion to be drawn that, before classifications are to be done, the size of the features to be detected should be considered when deciding which imagery to use. To improve upon the accuracy of the maximum likelihood classifier, an Artificial Neural Network was trained using ancillary data and the SPOT 5 image. Results showed an increase of over 30% in the classification accuracy of the ANN. Specific classes were easily identified, showing the ability of the ANN to classify imagery from a complex savanna environment. Experiments with various parameters of the neural network confirmed that there are no general guidelines that can be applied to a neural network to obtain high classification accuracy.
The private sector-community relationship in ecotourism : the case of Umngazi River Bungalows, Eastern Cape
(2009) Ngila, Dorothy Mutheu.
Ecotourism has increasingly been adopted in many countries as a responsible and sustainable form of tourism. The role of the private sector in ecotourism development and specifically the involvement of communities in their activities, is of interest given that the global system of development and neo-liberalism, advocates for an increased involvement of the private sector in developmental activities. This thesis aims to explore the relationship between the private sector and surrounding communities in the ecotourism sector using Umngazi River Bungalows in South Africa’s Eastern Cape Province, as a case study. Literature on neo-liberalism, ecotourism, community participation, and stakeholder theory was used to provide the theoretical framework for the study. A multi-strategy methodology approach was adopted in the study with qualitative and quantitative methods being used. Data analysis included basic quantitative statistical analysis and Dey’s approach of grouping responses for qualitative analysis. The thesis distinguished between three types of ecotourism and social responsibility projects at Umngazi River Bungalows, including service infrastructure, income-generating, and philanthropic projects. It was concluded that those projects where the hotel had substantial operational control were more successful than those that were fully community driven. The hotel was found to practice soft ecotourism. The management of the hotel and communities were proactive in ensuring that the natural environment was protected. The hotel has a positive and open relationship with its employees and the tribal authority in the area, and a conspicuous absence of government involvement as a key stakeholder in the operation of ecotourism in the area was noted. It was also concluded that full participation was not necessarily achieved through involvement in decision making structures, but that communities appeared to be content with the other forms of participation.
Towards integrating sustainability in the eThekwini Municipality integrated development planning process.
(2009) Subban, Theresa.
Many of today‟s global environmental problems can be traced back to cities. Managing the urban environment has become a priority not only for cities themselves, but also for the global environment as a whole. It has also placed considerable pressure on local governments to capacitate themselves with strategies, tools, and other competencies that enable them to effectively manage the environment. This thesis was undertaken to explore how the eThekwini Municipality located in South Africa is integrating sustainability, specifically within its Integrated Development Planning Process. This thesis is underpinned by the literature works of environmental policy making and discourse analysis as a methodology purported by Hajer (1995). One of the central premises of this literature is that any understanding of the natural environment is based on various representations coupled with assumptions and social choices. Therefore a detailed understanding of discursive practices that guides our perception of reality must be understood (Hajer, 1995). Ecological Modernisation, a newer policy discourse, does not comprise a unified set of ideas but has developed over many years of institutional debate. These set of ideas were initially drawn from large firms, environmental organizations, and scientific experts and to a lesser extent from local communities. Consequently this discourse represents a form of weak sustainability. The strong sustainability discourse calls for more involvement of local communities in respect of environmental issues and includes the discourse of LA21. The literature review therefore spans over a spectrum of discourses covering both weak and strong sustainability thinking as a base foundation on which to explore the case study of the eThekwini Municipality‟s Integrated Development Plans (IDPs): 2002-2005.
Public participation in wetland rehabilitation with refrence [sic] to long-term management and sustainability : a case study of Hlatikulu and Ntsikeni.
(2007) Nxele, Innocent Zibonele.; Narsiah, Inbersagran.; Kotze, Donovan Charles.
Within wetland rehabilitation projects there has been limited research that focuses on the level and nature of participation by local people, such as individuals from communal areas and landowners from private farms. The overall aim of this study was to analyze the level and nature of participation with specific reference to the holistic long term management and sustainability of wetland rehabilitation projects in Hlatikulu and Ntsikeni, KwaZulu-Natal Province, South Africa. Qualitative and quantitative research methods were employed in this study to examine the level of stakeholder participation in the projects. The Hlatikulu and Ntsikeni projects were undertaken on private land and government land (nature reserve) respectively. The World Overview of Conservation Approaches and Technologies (WOCAT) Framework was applied to analyze the level and nature of participation by different stakeholders that were involved in the selected projects. The study revealed that not all stakeholder groups participated in each and every phase of the projects. In Hlatikulu there was a moderate level of participation from the management of private land, but a limited degree of local participation from the Nsonge community. This, to some extent is attributed to the lack organization in the Nsonge community. There are no structures or authorities through which the process of local participation can be engaged. In Ntsikeni, although the process of continuous local involvement was limited to local Chiefs and some community representatives, the process appeared to be participatory in nature. The selected representatives report back in community meetings and other relevant forums, such as the Ntsikeni Nature Reserve Management Forum, which has been operating successfully for several years. Local people participated in the rehabilitation projects mainly as paid workers, and also in providing advice in the planning processes. For both sites, the results demonstrated that there is a need to enhance and harness active local participation in order to ensure the long term management and sustainability of the Hlatikulu and Ntsikeni wetlands. Within this study, the WOCAT framework was applied to provide insights to two sites, with different land tenure and land use contexts. The results of this study suggest that the WOCAT framework has a high potential to be applied across a diversity wetland rehabilitation sites within South Africa.
A land suitability evaluation for improved subsistence agriculture using GIS : the case study of Nkwezela, KwaZulu-Natal, South Africa.
(2007) Ebrahim, Fazal.; Ahmed, Fethi B.
Rural farmers in the Nkwezela Area, with an average family size of 10 people, face a number of problems. The crops that are predominantly cultivated in the area, for subsistence (maize, dry beans, sorghum, potatoes, cabbages and turnips) have very low yields compared to the potential yield of the land. Natural resources in the area are increasingly deteriorating. In addition, arable land has shown remarkable signs of soil erosion that may lead to loss of soil fertility. This study evaluates the current land suitability for subsistence agriculture in Nkwezela based on climatic, soil, topographic and crop requirement data collected from different sources. The spatial parameters of the land resources were digitally encoded into a GIS database to create thematic layers of the land resources which was then compared to the crop requirement data of the selected crops grown in Nkwezela namely, maize, sorghum, dry beans, potatoes, cabbages and turnips. A GIS was used to overlay the thematic layers of the resources to select areas that satisfied the crop requirements of the selected crops. The results of the analysis of the land evaluation in the study area showed that the very hot summers, very cold winters together with the high clay content in the soils are the two limiting factors in Nkwezela. The land suitability maps indicate that sorghum is highly suitable in the area with dry beans and maize being relatively suitable. Cabbages are the least the least adapted crop with potatoes and turnips being not suitable due to the high temperatures during the growing season and the very cold winters. In conclusion Nkwezela is in a high rainfall area that is suitable for subsistence agriculture where warm season crops like dry beans, maize and sorghum are used for daily consumption by the community and can be cultivated in a sustainable manner. In addition the correct farming methods, procedures, liming and fertiliser requirements must be implemented, adhered to and maintained in order to improve crop yields in a sustainable manner and to encourage subsistence agriculture by the community.
Labour-based rural road maintenance for poverty alleviation : a case study of the Zibambele programme in Umbumbulu, KwaZulu-Natal.
(2006) Jaggernath, Jyotikumarie.; Bob, Urmilla.
This research is an evaluation of labour-based methods and techniques that are used in rural road construction and maintenance. The study places emphasis on the Zibambele rural road maintenance programme in Umbumbulu, which is based on a lengthmen (male or female) system. The research is an attempt to determine how strategies such as Zibambele can be used for the social and economic upliftment of impoverished rural areas as well as contribute to adequate road access for rural communities to address the legacy of apartheid, with special reference to the empowerment of women-headed households. Rural road networks in South Africa are underdeveloped and characterised by its poor state, lack of maintenance and lack of provision, thereby having little impact on the lives of the rural poor Black population. It is evident in the study that development and maintenance of physical infrastructure are keys to rapid economic growth and poverty reduction. The study examined the impacts of labour-based rural road maintenance on accessibility and poverty alleviation in the Umbumbulu community through the use of quantitative methods (specifically a questionnaire survey) and qualitative methods (specifically focus group discussions, ranking exercises, mental mapping and venn/ chapatti diagrams). The_findings of the study indicated that the Zibambele poverty alleviation and rural road maintenance programme impacted positively on the livelihoods of many women-headed households by providing an income, facilitating skills development, and improving their social environment. It was also determined that through the introduction of new programmes such as Zibambele, the transport infrastructure within a community and the quality of life immediately improves, thus alleviating many affects of poverty
Communities' perceptions and assessment of biodiversity conservation strategies : the case of protected areas in Kenya.
(2010) Makindi, Stanley Maingi.; Bob, Urmilla.
Protected areas in Kenya constitute 7% of the total land area with over 75% of wildlife in the country being found on private or communal land. Wi th one of the highest population growth rates in the world and facing a range of developmen t issues with limited resources, one of the greatest challenges in Kenya is reconciling and sus taining economic development with biodiversity conservation and sharing the costs and benefits of conservation between individuals, state and the general community. The study was info rmed by the relevant literature and the researcher’s fieldwork which was conducted in 2008 in three categories of protected areas under different governance types and primary management o bjectives in Kenya (Lake Nakuru National Park – government managed, Kimana Community Wildlif e Sanctuary – communally managed, and Kedong Game Ranch – privately managed). The res earch examined the general issues of how local communities in Kenya have embraced differ ent biodiversity conservation strategies. A major emphasis was on identifying those factors inf luencing their attitudes towards conservation approaches and their participation in conservation management institutions. At issue was whether support for a particular conservation strat egy is primarily a function of communities’ experiences with biodiversity decline or their rela tionship with the conservation authorities. The research employed both qualitative and quantitative techniques in gathering the data. A total of 270 community respondents and 45 staff respondents were interviewed. Several demographic and socio-economic characteristics of the local peo ple that include age, gender, educational level and location, amongst others, were found to signifi cantly influence the attitudes of the local people towards the protected areas conservation act ivities. The direction of the influences (whether positive or negative) depended on the mana gement category of the particular protected area. The general findings of the study suggest tha t although local people appreciate the crucial value of biodiversity and the role of protected are as in conserving it, there is some evidence of resentment towards some management activities of th e protected area regulators. Negative attitudes were attributed to perceived problems of living next to the protected areas such as lack of involvement of the local people in the managemen t of the protected areas, restrictive access to and use of resources from the protected areas, hara ssment by the conservation enforcing agents, conflicts with wildlife and lack of compensation fo r damages and losses incurred. Widespread support for the management activities was associate d with perceived benefits to the local populations such as support for educational program mes, social amenities, employment and business opportunities. It is clear from this study that different rationales of conserving biodiversity need to address the issue of protected area management in the context of sustainable development through a combination of conservation s trategies.
The provision of primary health care in marginalized rural communities : comparative case studies of Zombodze (Swaziland) and Nkanyisweni (eThekwini Municipality, South Africa)
(2007) Mbambo, Mthokozisi Comfort.
The provision of health in communities and their inhabitants are very important
Late quaternary palaeoenvironments of the Mfabeni Peatland, Northern KwaZulu-Natal.
(2005) Finch, Jemma M.; Hill, Trevor Raymond.; Ellery, William Nolan.
To assist in developing a more precise understanding of past climatic changes in southern Africa, further pollen analytical research is required. In the past, pollen sites in the subregion have been restricted to swampy areas such as permanent springs and peat deposits. While such sites are often rare as a consequence of the aridity of the country, rich polliniferous deposits can be found in the peatlands surrounding coastal lakes in the Maputaland Coastal Plain. The Mfabeni peatland, situated on the eastern shores of St. Lucia, contains relatively old sediments dating back to >45000 years bp at a depth of 7.80m. A multi-proxy approach, comprising radiocarbon, stable carbon isotope (513C) and palynological analysis, was applied in the investigation of Late Quaternary climatic conditions and vegetation changes along the Maputaland Coastal Plain. A single 10 m sediment core, dating back to >45000 years bp, was extracted from the Mfabeni Peatland. A detailed fossil pollen analysis of Mfabeni sediments indicated the existence of extensive Podocarpus-abundant coastal forests before ca. 44500 years bp. The onset of wetter local conditions after this time is inferred from forest retreat and the development of swampy conditions, which prevailed until ca. 25000 Cal years BP. Conditions during the Last Glacial Maximum (LGM; 18000 years BP) are inferred to have been generally colder and drier, as evidenced by forest retreat and replacement of swampy reed/sedge communities by dry grassland. A significant depletion in 813C values at ca. 18200 Cal years BP indicates the dominance of C3 vegetation during the LGM, reflecting considerably colder conditions. This is in agreement with palaeoenvironmental indications from elsewhere in the Transvaalian Ecozone, although conditions at Mfabeni were more moderated in their manifestation, which can be attributed to the proximity of this site to the ocean. Cool, relatively moist conditions are inferred for the Holocene Altithermal (ca. 8000-6000 years BP), as evidenced by forest growth and expansion during this time. Warm, dry conditions are inferred for the Late Holocene, with the establishment of grassland/savanna type vegetation in the area after ca. 2000 Cal years BP.
Local economic development and local government : a case study of the Ingwe Municipality.
(2005) Gardyne, Samantha Lee.; Hill, Trevor Raymond.
On a global scale, the challenges of confronting poverty and inequality continue to dominate the development agenda. The ability of local economic development to empower local people has earned favour with national governments and development theorists. The imperative facing South Africa to achieve a more equitable and sustainable economy is essentially the challenge to adopt and implement a development approach that will reduce poverty and inequality to the greatest extent. It is within this context that the South African government has sought to incorporate local economic development into their economic development framework, predominantly through the decentralisation of development control and planning to the local government level. This dissertation seeks to examine the potential for South African local government to have a positive impact on economic development through fulfilling the roles and responsibilities provided in the government's mandate for developmental local government. The analysis focuses on the local economic development strategy adopted by the Ingwe Municipality, with specific attention given to the diversification of their economy through the tourism sector. The dissertation seeks to identify key lessons and contributions for local economic development that Ingwe has to offer, as well as providing recommendations for the Ingwe municipality's benefit. An extensive range of research methodologies, including interviews, questionnaires, secondary data analysis and literature reviews, were employed in this study. Analysis and evaluation of the Ingwe Municipality's local economic development strategy was achieved using the Sustainable Livelihoods Framework and the guidelines set out by Nel (1999). This dissertation revealed the potential that does exist within local government to play a developmental role. The Ingwe experience illustrates the benefits gained when local leadership and vision is extended on behalf of the local communities. Through the acquisition of funds and the formation of public and private partnerships, the Ingwe Municipality has created an economic environment conducive to further economic growth through the avenue of tourism. While success cannot be guaranteed, the Ingwe Municipality is evidence of the potential that does and can exist within local government to embark on innovative pro-poor development initiatives.
Discriminating wetland vegetation species in an African savanna using hyperspectral data.
(2010) Mafuratidze, Pride.; Mutanga, Onisimo.
Wetland vegetation is of fundamental ecological importance and is used as one of the vital bio-indicators for early signs of physical or chemical degradation in wetland systems. Wetland vegetation is being threatened by expansion of extensive lowland areas of agriculture, natural resource exploitation, etc. These threats are increasing the demand for detailed information on vegetation status, up-to-date maps as well as accurate information for mitigation and adaptive management to preserve wetland vegetation. All these requirements are difficult to produce at species or community level, due to the fact that some parts of the wetlands are inaccessible. Remote sensing offers nondestructive and real time information for sustainable and effective management of wetland vegetation. The application of remote sensing in wetland mapping has been done extensively, but unfortunately the uses of narrowband hyperspectral data remain unexplored at an advanced level. The aim of this study is to explore the potential of hyperspectral remote sensing for wetland vegetation discrimination at species level. In particular, the study concentrates on enhancing or improving class separability among wetland vegetation species. Therefore, the study relies on the following two factors; a) the use of narrowband hyperspectral remote sensing, and b) the integration of vegetation properties and vegetation indices to improve accuracy. The potential of vegetation indices and red edge position were evaluated for vegetation species discrimination. Oneway ANOVA and Canonical variate analysis were used to statistically test if the species were significantly different and to discriminate among them. The canonical structure matrix revealed that hyperspectral data transforms can discriminate vegetation species with an overall accuracy around 87%. The addition of biomass and water content variables improved the accuracy to 95.5%. Overall, the study demonstrated that hyperspectral data and vegetation properties improve wetland vegetation separability at species level.
An analysis of municipal solid waste management in South Africa using the Msunduzi Municipality as a case study.
(2009) Naidoo, Kaminee.; Beckedahl, Heinrich Reinhard.
Municipal Solid Waste generation has become an inevitable consequence of lifestyles and daily living. However, the nature (quantity and quality) of this waste stream can vary and is largely dependent upon the manner in which waste production is managed, by both government and the public. The increasing practices of littering, dumping and burning of solid waste by households (and industries though not extensively dealt with in this study) in South Africa has led to the finding that municipal solid waste is being irresponsibly managed. In this regard, it becomes necessary to investigate the attitudes and behaviour of individuals and households toward solid waste practices, which further include mitigating measures such as reduction, reuse and recycling for the generation of solid waste. The role of the South African government in providing a refuse removal and safe disposal service to all citizens is suggestive of the responsible role of government to ensure that solid waste is being effectively managed by all sectors of society. The aims of this study in light of the above were to review the municipal solid waste policies and strategies of local government authorities in South Africa, highlighting the shortcomings and discrepancies that exist between legislative policies and actual management practices; which is also reflective of the attitudes and approaches to solid waste management by households. This was achieved by focusing on the case study of the Msunduzi Municipality and included investigations into socio-economic and cultural influences on solid waste disposal practices. The objectives of the study were achieved by means of a questionnaire survey that elicited specific responses from 650 sampled households in five suburbs of differing socio-economic status. A further analysis to identify the nature of household municipal solid waste for landfilling from three suburbs of differing socio-economic status was conducted by categorizing 25 tons of garbage at the New England Road Landfill Site, leading to inferences about consumer purchasing power and disposal practices. Further, key personnel in the Msunduzi Municipality’s waste management division were interviewed to ascertain the solid waste challenges faced at local municipal and national levels of government. The study revealed several significant findings of which the most important is that the implementation of South Africa’s national municipal solid waste legislation policies and strategies are inconsistent with local government practices and procedures; thus compromising equity, efficiency, effectiveness and the sustainability of municipal solid waste disposal. Factors contributing to this are shown to be inadequate management and service delivery. The research has shown that monitoring and control systems which purported to ensure environmental sustainability are lacking and inadequately address issues where the implementation of municipal solid waste regulations are in contravention with national solid waste policies. The outcomes of the questionnaire survey and the assessment of household municipal solid waste for landfilling reveal that socio-economic status and culture do in fact influence the nature of solid waste and the disposal methods used by residents. The receptiveness of households towards adopting suggested municipal solid waste disposal practices was also investigated. The non-compliance of residents with municipal solid waste legislation and policies points towards a lack of monitoring and control measures, thereby not providing for a sustained and adequate service delivery which is environmentally sound. The research further suggests that all sectors of the South African public and the government are inadequately informed in terms of aspects of municipal solid waste. This has led the researcher to recommend that further education and awareness campaigns and its role in environmental sustainability are needed so that a sharing of responsibility between government and the public can be effected to aid municipal solid waste management in the country. It is argued that the insight into the roles of socio-economic status and cultural influences over solid waste practices provide a platform from which municipal authorities can work to specifically address the problems associated with municipal solid waste at a community level. It is the task of the national government to ensure that South Africa’s municipal solid waste is being responsibly managed at the local municipal levels so that the health and safety of the environment and its citizens are suitably addressed, hence the focusing on solid waste legislation and national policies (which have been recognized internationally as being environmentally sound and sustainable) must be translated in terms that local municipalities can adopt, assuming that they have been sufficiently empowered in terms of both knowledge and adequate budgeting.
Conceptualisations and experiences of the presence of informal settlements into formal residential areas : a study of the residents in formal housing of the Clare Estate area, Durban, KwaZulu-Natal.
(2010) Nadasen, Naadira.; Houghton, Jennifer Alice.
Cities across the globe are characterised by inequality. Within South African cities the marginalised population has unequal access to certain resources and opportunities, one such resource that the research is centred upon is the access and occupation of land. Many South African formal residential neighbourhoods are characterised by their proximity to informal settlements. This is largely due to the fact that local government has not adequately addressed the issue of occupation and land; this is clearly evident in Clare Estate in which the study was undertaken. The thesis refers to literature that is critical of the notion of the ‘divided city’ concept and draws on other concepts such as justice, social inequalities, politics of space, sense of place and NIMBY to name but a few. The research adopted a quantitative and qualitative approach, where questionnaires and indepth interviews with relevant stakeholders structured the basis of the research, respectively. This thesis investigated the experiences and understandings of formal residents of Clare Estate, in regard to the informal settlement which is encroaching on their neighbourhood boundary. The majority of the formal residents were not satisfied with the presence of the informal settlers and requested the relocation of the informal settlements to another location. The thesis shows how the informal settlers have been stereotyped with negative images and therefore the formal community has socially excluded them. Furthermore, most formal residents interviewed emphasised that the presence of the informal settlements only attracted negative consequences, such as the increase in criminal activity, the hampering of social activities and the reduction of property values. In addition, this thesis reveals that there existed a strained relationship between the formal and informal communities in Clare Estate. It was also evident that the formal residents have attached a personal meaning to their residential area. This sense of place was seen to be threatened by the informal settlement in their neighbourhood. However, it should be stated that the local government authorities were re-addressing the issue of the encroachment of the informal settlement and there have been some attempts to relocate these settlements. Where the relocation initiative has not been successful, the government provided better building materials to the informal community to improve their housing situation in Clare Estate. However, this latter initiative was not accepted by the residents in formal housing who want the informal community ‘out’ of their residential area.

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