University of Khartoum

Spatial Hydrological GIS Analysis and Estimations of Runoff in Khor Gowb Drainage Basin in the Red Sea State –Sudan

Spatial Hydrological GIS Analysis and Estimations of Runoff in Khor Gowb Drainage Basin in the Red Sea State –Sudan

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Title: Spatial Hydrological GIS Analysis and Estimations of Runoff in Khor Gowb Drainage Basin in the Red Sea State –Sudan
Author: Osman, Badr-Eldin Taha
Abstract: The magnitude and availability of surface waters in Khor Gwob of the Red Sea State was examined using spatial hydrological analysis in Geographical Information Systems (GIS). As a system with advanced geo-modelling capabilities, GIS is used to integrate spatial analysis with hydrological modelling. Several levels of spatial hydrological modelling such as parameterization, spatial integration, regionalization and assessment of hydrologic problems were made. Four physical / deterministic and stochastic models were developed and applied at both catchment’s and regional scales to estimate the water volume of many drainage basins in the area. The results evaluated using the general error term to compute the differences between the estimated areal runoff and the observed runoff in the Khor Gwob drainage basin in Erkowit area of the Red Sea State. Accordingly, one stochastic model has been tested and regionalized. The significance of the catchment and regional runoff estimates was evaluated in relation to errors inherent in the spatial database, GIS analysis, and hydrological modelling (e.g., the Rational Formula). Finally, it is concluded that Khor Gwob basin and the Red Sea State at large, contributes an annual surface runoff that exceeds the human and animal needs with a considerable surplus that can be used for agriculture (i.e., the region is water sufficient). Conversely, this sufficiency is limited by the problem of spatial distribution and related storage difficulties. With regard to human, animal and agricultural water supply, only few catchments can support the proposition of water sufficiency in the State.
URI: http://khartoumspace.uofk.edu/handle/123456789/9824
Date: 2012-02


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