Browsing by Author "E.T., Janga, Joseph"

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    A study of the effect of environmental changes on the hydrology of Lake Turkana, Kenya
    (University of Dar es Salaam, 1991) E.T., Janga, Joseph
    This dissertation is meant to study the environmental changes on the hydrology of lake Turkana and to demonstrate how data from land sat series satellites with a Multi Spectral Scanner (MSS) on hoard are abie to provide synoptic view with high observational density tor analysis within a short time and at lesser operational costs- a situation which would have been time consuming or sometimes not getting information at all due to the difficulties in getting access to the area if conventional methods of ground measurements were to be used. The study attempts to use meteoroIogicai data, hydrological data, fish data and the satellite image data or the study area in photographic form, plus ground truth information by visiting the study area on the Western side of the lake. Results show that the study area is characterized by high evaporationa1 losses which are always higher than the rainfall. Relative humidity is 1.1 ways low. The lake levels have continued to fall throughout the study period with a corresponding decrease in fish catcnes. River discharges also were noticed to have reduced into the lake. Vegetation, bushland and grassland were identified against the background of the lake Turkana. Drainage patterns identified from the images on the i'urKwell and Kerio catchment basins were dendritic in nature.