Wetland Impacts On The Optical
Characteristics Of The Inshore Bays Of
Lake Victoria, East Africa
Author(s)
C. Rossi, A. Cózar, L. Bracchini, S. Focardi & S Loiselle
Abstract
Lake Victoria is the largest tropical lake in the world and has the most densely
populated lake catchment in the tropics, with major cites from three nations that
lie on its shores. The lake provides resources that are fundamental for the local
population and national economies. Inshore areas are particularly sensitive to
changes in land use, wetland management and wetland vegetation. The highly
heterogeneous inshore waters of Lake Victoria present a wide range of optical
environments, from strongly humic environments to highly turbid areas and to
areas of massive algal blooms. In the present study, the spatial analysis of the
light field along the Ugandan and Kenyan coast was analysed using a series of
spectroradiometers, simultaneously with chemical and biological measurements.
By combining both the high spatial resolution data from the water column, with
the satellite derived spatially explicit information about the coastline
characteristics, it was possible to examine the relation between wetland coverage
and water quality. The extinction coefficients in the visible wavelengths showed
higher extinction in wetland-bordered areas for wavebands necessary for
chlorophyll photosynthesis, reducing the euphotic depth available for
phytoplankton growth.
Keywords: Lake Victoria, Africa, DOM, PAR, water quality, wetlands, Great
Lakes.
Keywords
Lake Victoria, Africa, DOM, PAR, water quality, wetlands, Great
Lakes.
Related Book
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