Articles by Keyword: Sediment

Search results for Sediment

We found 29 results for you
  1. HYDROCHEMISTRY OF THE UPPER ORANGE RIVER CATCHMENT

    HYDROCHEMISTRY OF THE UPPER ORANGE RIVER CATCHMENT

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    A four year pre-impoundment study of the catchment of the Hendrik Verwoerd Dam was conducted. The Orange River was the major source of dissolved chemicals and suspended sediments, while the Caledon River contributed 24 and 30% respectively, and the Kraai...
  2. RATE OF EROSION IN THE CATCHMENT OF THE BULBERGFONTEIN DAM NEAR REDDERSBURG IN THE ORANGE FREE STATE

    RATE OF EROSION IN THE CATCHMENT OF THE BULBERGFONTEIN DAM NEAR REDDERSBURG IN THE ORANGE FREE STATE

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The volume of sediment in the Bulbergfontein Dam was computed after mapping the area of the dam and ascertaining the depth of the sediment by digging and augering. The watershed of the impoundment had been delimited by means of aerial...
  3. DISTINGUISHING SUB-ENVIRONMENTS OF SEDIMENT DEPOSITION IN RESERVOIRS USING PARTICLE SIZE DISTRIBUTION PARAMETERS

    DISTINGUISHING SUB-ENVIRONMENTS OF SEDIMENT DEPOSITION IN RESERVOIRS USING PARTICLE SIZE DISTRIBUTION PARAMETERS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The deposition of sediment and the distribution of sediment sizes in impoundments is related to the hydraulic mechanisms of the lacustrine or reservoir environment. Granulometric parameters of sediments can be particularly sensitive indicators of the hydraulic environments occuring in different...
  4. PHOSPHORUS DYNAMICS IN THE MONIMOLIMNION OF SWARTVLEI

    PHOSPHORUS DYNAMICS IN THE MONIMOLIMNION OF SWARTVLEI

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The exchange of phosphorus between the bottom sediment and monimolimnion of Swartvlei, a meromictic, humic lake, was investigated during the last three months of 1980. The concentrations of oxygen, dissolved salts, phosphorus and Fe++ in the water column were monitored,...
  5. NUTRIENT CYCLING IN MARINE ECOSYSTEMS

    NUTRIENT CYCLING IN MARINE ECOSYSTEMS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The overall cycles of nitrogen, phosphorus and silicon in the sea are described and compared. Data on the fluxes and rates of change between various pools of each nutrient are given, where available, and gaps in knowledge are pointed out...
  6. AN ASSESSMENT OF THE POTENTIAL IMPACT OF ALIEN INVASIVE VEGETATION ON THE GEOMORPHOLOGY OF RIVER CHANNELS IN SOUTH AFRICA

    AN ASSESSMENT OF THE POTENTIAL IMPACT OF ALIEN INVASIVE VEGETATION ON THE GEOMORPHOLOGY OF RIVER CHANNELS IN SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Invasion of the riparian zone by alien vegetation is recognised as a serious problem in many areas of South Africa. Vegetation is a dynamic component of river channels. It is an important control variable affecting channel form whereas the flow...
  7. Fluvial Sediment Yield to the Natal Coast: A Review

    Fluvial Sediment Yield to the Natal Coast: A Review

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Sediment yield is the quantitative expression of soil eroded from the hinterland and deposited in the ocean. This paper reviews existing literature available on sediment yields, particularly for the Natal coast, South Africa. Several authors have attempted to quantify the...
  8. Land use and cover changes in the Likangala catchment of the Lake Chilwa basin, Malawi: implications for managing a tropical wetland

    Land use and cover changes in the Likangala catchment of the Lake Chilwa basin, Malawi: implications for managing a tropical wetland

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    This study analyses land use and cover changes in the Likangala River catchment of Lake Chilwa, Malawi, an endorheic tropical African lake. It also examines how land use-related physico-chemical and hydrological parameters in two affluent rivers of the lake affect...
  9. Phosphorus sorption characteristics of sediment in the Simiyu and Kagera River basins: implications for phosphorus loading into Lake Victoria

    Phosphorus sorption characteristics of sediment in the Simiyu and Kagera River basins: implications for phosphorus loading into Lake Victoria

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    As part of a larger study to assess the influence of land use on riverine and atmospheric phosphorus (P) loading to Lake Victoria, P sorption characteristics of eight composite bottom sediment samples from the Simiyu and Kagera rivers were determined...
  10. Copper, zinc and iron concentrations in water, sediment and <em>Cynothrissa mento</em> (Regan 1917) from Ologe Lagoon, Lagos, Nigeria: a preliminary survey

    Copper, zinc and iron concentrations in water, sediment and <em>Cynothrissa mento</em> (Regan 1917) from Ologe Lagoon, Lagos, Nigeria: a preliminary survey

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The levels of Cu, Fe and Zn in water, sediment and Cynothrissa mento, a commercially important fish species, were investigated from April 2007 to March 2008 at three sites in Ologe Lagoon. Metal levels in the water column and C...