The Limnogeology of the Lakes Sagara and Nyamagoma: Tanzania Journal of Engineering and Technology
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Date
2008
Journal Title
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Abstract
The present study focllses 011 the IiI1l11ogeological aspects of the lakes Sagara and Nyalllagoma within tITe Malagarasi
Wetland Ecosystem. Abiotic parameters frol11 water and sediment samples were determined during the d,y and wet
seasons using appropriate gears and methods. The data show variation of the abiotic parameters in both lakes from the
water sUiface to the bottolll. Lake Nyamagoma is less turbid (0.7-24 NTU) than Lake Sagara (25 to 65 NTU). The water
transparency was also high at Lake Nyamagollla (0.75-1.5 111) thus supporting the observed turbidity trend. The physical
chemical changes may be attributed to processes such as cooling, dissociation, dissolutioll, decomposition, adsorption,
precipitation, cation exchange and photosynthesis. However, higher nutrient concentration was obsel1Jed in the wet
season than d,y season with the exception of SiD] consequent to dilution effect by sUlface runoff. The mineralogical
content (Kaolinite, Smectite, lllite and Quartz) of the lake sediments indicate existence of good drainage conditions at the
lakes as supported by the geology of the area, It is recommended that a long-term lilllnogeological mOllitoring alld
evaluation be conducted so as to understand future nutrient hydrodynamics and hydrological functioning of the wetland
ecosystem.
Description
Keywords
Limnogeology, Malagarasi Wetland, Lake Sagara, Lake Nyamagoma
Citation
Nkotagu, H.H. and Athuman, C.B., 2008. The Limnogeology of the Lakes Sagara and Nyamagoma. Tanzania Journal Engineering and Technology, 2(1), pp.12-21.