Academic literature on the topic 'Inanda Dam (KwaZulu-Natal)'

Increased levels of nutrients and pollutants are expected in the Inanda Dam (KwaZulu Natal, South Africa) as a result of wastewater effluent discharge, informal settlements and agricultural runoff in the catchment. Contaminants of atrazine and 2-methyl isoborneol were dosed into the feed water of a granular activated carbon (GAC) pilot plant to assess the performance of different process options for the treatment of Inanda Dam water. It was found that the use of ozonation and GAC did not result in increased levels of biological activity as expected. The use of ozone in conjunction with GAC is however recommended as significant benefit was obtained in the reduction of UV absorbance, chlorine demand and concentrations of other microcontaminants.

The Inanda Dam, situated some 32 to 35km upstream of the Mgeni River estuary on the Indian Ocean 5 km north of Durban, was constructed between 1984 and 1989. This impoundment deprived the downstream section of a great volume of water and sediment supply, initiating significant downstream changes. This situation is compounded by sand winning which directly extracts about 210,000 tonnes of sediment from the Lower Mgeni further depriving the estuary of sediment. A 1997 study predicted that assuming a continuous competent discharge and low contribution of sediments from the tributaries, the channel would gradually scour. Other predictions included a reduction in the total sediments reaching the estuary, continued flushing of existing channel sediments downstream towards the estuary, site-specific channel bed erosion at times of peak water release, gradual build up of sediments near the estuary mouth, gradual fining of bed-load channel and estuarine sediments, and ongoing re-establishment of the central island. The main aim of this study was thus to investigate downstream changes in the Mgeni river estuary below the Inanda dam with regards to sediments, water discharge and channel morphology from 1997 to test these assertions. Results show a decrease in competent discharge below the Inanda dam since 1997, resulting in a corresponding decrease in sand and an increase in mud fractions, with the mud content being associated predominantly with heavy minerals. This is reflected in the poorly sorted sediment. The plotting of cross-sectional survey revealed site-specific erosion, as well as estuarine bank failure to be an on-going process, and indicate points of bed scouring and accretion. A number of reasons have been identified as geomorphological explanations for the changes since 1997. These include among others, a lower hydraulic gradient at the estuary, occasional minor flood events, a weak bank material composition along some portions of the estuarine bank, the Tnanda dam , which impounds coarse sediments and large volume of water and increased tidal activity at the Mgeni estuary. It is concluded that although some of the probable responses predicted in 1997 have happened, sufficient relaxation time may not yet have elapsed for others to become evident.<br>Thesis (M.Sc.)-University of Natal, Durban, 2002.

Inanda Dam situated near Durban in the Mngeni River, in the province of KwaZulu-Natal was completed in the late 1980s. As a typical large dam of the modern era, one major impact of the dam was the displacement and resettlement of over 1300 rural households living under communal ("tribal") tenure. Households were relocated to different places some kilometres away from their original places. These new relocation areas, where different tenure and other arrangements prevailed, then became their permanent residential location. This study was initiated to investigate two key issues. It sought to understand how the relocation altered the quality of life of removed families. It also sought to explore adaptation strategies adopted by the settlers and constraints to effective adaptation. Primary data were collected by means of in-depth interviews and direct observation of certain indicators of quality of life in the study area, over a period of five months. Fourteen households participated in the study. Simple quantitative methods were used to supplement the overall qualitative research design. Because of the small sample that was used, the study is perhaps not widely generalizable. However the study does provide insights into the long-term impacts of this inadequately mitigated displacement. It is also a case study of the nature of long-term environmental injustice and disruption associated with the construction of large dams. This is an injustice made worse by the political system of apartheid prevailing when the dam was planned and built. The general findings are that the dam did impact negatively on the quality of life of the displaced families. Thirteen years after compulsory relocation, the quality of life of several families has deteriorated instead of slowly improving. While the process of adaptation for some families has been easy, other families are still battling to reconstruct their livelihoods and quality of life. Where benefits of access to services such as potable piped water and electricity are enjoyed, these benefits are overshadowed by inability to pay and lack of access to other goods such as proper housing and adequate land. Loss of access to common property resources has meant a shift towards more money-based livelihood generation strategies. Constraints to adaptation are both internal and external. Low levels of socioeconomic status, poor access to environmental resources and the unfavourable political conditions in the relocation areas are some of the major constraints to effective adaptation. While the individual and group coping strategies employed have assisted families in the adaptation process, it is argued that the inadequacy of state support mechanisms significantly retarded the ability of households to adapt to life in the relocation areas.<br>Thesis (M.A.)-University of Natal, Durban, 2002.

Dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Environmental Health, Technikon Natal, 2001.<br>The debate surrounding mercury pollution of the river system below Thor Chemicals in Kwa Zulu Natal, South Africa has been of concern to the people of the region for several years. No scientific assessment of Mercury pollution has been carried out to date, other then a study conducted by Johnston et al. (1991) in 1990 in an area restricted to within 5 kilometres of the plant. Due to elevated levels being detected directly below the plant, Johnston et al. (1991) have expressed concern that this could result in the mobilisation of Mercury into the ecosystem and possibly threaten the Ecology of the Inanda Dam which is located approximately 20 kilometres south of Thor Chemicals which is a major reservoir for Durban. Added to this, the community residing in the area has expressed a great deal of concern and the matter was taken up in parliament in 1998. These factors provide impetus for a follow up study to determine the extent of mercury transformation into the higher trophic levels in the area surrounding Thor Chemicals. In order to quantify the extent to which mercury has become mobilised in the ecosystem and to identify possible pathways of exposure to the community, samples of sediment, algae, cattle hair and fish were taken at ten sample sites. These sample sites were selected at intervals along the Mngceweni and Umgeni River. The first sampling site was situated below Thor and the final sample site was located at the head of the Inanda Dam. Sediment, algae, cattle hair and fish were specifically chosen as they are considered to be reliable indicators of mercury pollution and mobilization. Fish,form an important part of the diet of the community residing in the study area. Mercury concentrations for the above parameters, were compared to mercury concentrations found in the control area, upstream from Thor, as well as to international and local standards. Composite sediment samples taken at the first sample site, within 500 metres of Thor Chemicals, revealed a mercury level of 54j.lg/gram. Mercury concentrations detected in the remainder of the composite sediment samples were significantly lower and revealed similar levels of magnitude throughout the rest of the study area. The higher concentration of mercury in the sediment at the site directly below Thor Chemicals may be attributed to a high<br>M

Dissertation submitted in partial compliance with the requirements for the Masters Degree in Technology: Education at the Durban Institute of Technology, 2003.<br>This research investigates the South African Developmental Appraisal System (DAS). It is concerned with exposing implementation problems arising from its perception by educators in four secondary schools in the Central Circuit of the Inanda District ofKwaZulu-Natal.<br>M