Abstract
Changes at the mud surface in Midmar Dam, following impoundment, were studied by examining vertical profiles of selected parameters in sediment cores. Distinct stratification in organic carbon, pH and exchangeable Al3+ was evident. Phosphate adsorption characteristics in the stratified sediments was quantified using Langmuir adsorption isotherms. The adsorption maxima and bonding energy constants in the surface sediments (0–3 cm) were markedly lower than those below 3 cm, indicating that the surface layers are less efficient at binding phosphate than the deeper layers. Radiotracer experiments indicate that the layers comprising the top 3 cm of sediment predominate in P04-P exchange with the overlying water.
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Twinch, A.J., Breen, C.M. (1982). Vertical stratification in sediments from a young oligotrophic South African impoundment: implications in phosphorus cycling. In: Sly, P.G. (eds) Sediment/Freshwater Interaction. Developments in Hydrobiology, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8009-9_39
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DOI: https://doi.org/10.1007/978-94-009-8009-9_39
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