Long-term trends in water quality, water quantity and biodiversity at Lake Nakuru, Kenya
Raini, Jackson A.
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Routine in situ and laboratory measurements of pH, Conductivity, DO, temperature, alkalinity, salinity, TSS, TDS, Secchi depth and nutrient levels have been carried out at 13 sampling sites in Lake Nakuru (Kenya), influent streams and urban effluent since 1993. Mean values for 8 lake sampling sites are: pH (10.14), Temperature (27.3°C), Conductivity (38.8mS/Cm), DO (9.21mg/l, 83% saturation), Secchi depth (10.3Cm). Mid-lake sampling at 19 sites showed the presence of a thermocline of upto 4 °C gradient (surface to bottom). DO levels (>2m/l) remained within the tolerance thresholds for A. fusiformis and the fish (S. grahami). Trace metal concentrations in Lake Nakuru water and sediment as determined by X-ray fluorescence spectroscopy, varied over an order of magnitude for each of the metals for dry sediment and water samples. In 1995, results (ppm) ranged as follows: chromium (8.6-155), zinc (44-629), lead (4-102), copper (4.5-94.8), arsenic (1.5-3) and Nickel (1.5-16.5), mercury (1.5-3.....
JournalProceedings of the 11th World Lakes Conference - Volume 2
Spatial CoverageKenya, Rift Valley, Nakuru L.
Conference Name11th World Lakes Conference
Conference PlaceNairobi (Kenya)
CitationOdada, Eric & Olago, Daniel O. (Ed.) Proceedings of the 11th World Lakes Conference: vol. 2. p. 57-62.
- Conference Papers