University of Khartoum

Subsurface Water Harvesting of Wadi Nyala in Southern Darfour State

Subsurface Water Harvesting of Wadi Nyala in Southern Darfour State

Show full item record

Title: Subsurface Water Harvesting of Wadi Nyala in Southern Darfour State
Author: Sabil, Ali Handal Ibrahim
Abstract: Rainwater harvesting is a technology used to collect, convey and store rain water for later use. The main objective of the study is to assess and locate suitable places for subsurface dams along Wadi Nyala course with specific objective to locate a suitable subsuface dam that can augment Nyala water supply. The input data to the analysis was clipped from the available public domain data. These iclude 90 m resolusion DEM, FAO soils map, USGS land use /land cover data and USGS Curve number. Other site specific data were collected from their respective sources. To locate the subsurface dam, suitability analysis under GISenvironment is done. Several spatial maps were produced in GIS environment reflecting the spatialdistributionsof the catchment physiographic parameters. The procedure followed to locate suitable Water Harvesting subsurface dam is toreclassify theproduced catchment physiographic parameters maps, weights are then assignto the reclassified data maps of the different parameters(layers) to reflect their relative importance. The class ranges are then changed in to rates. These ratings are assigned to reflect the importance of a class within a the parameter category. The assigned weights are applied and overlayed to produce the suitability maps. Using suitability analysis several locations suitable for subsurface dam were demarkated. It was found that Belail area is the best location for the subsurface dam to augment Nyala water supply due to its proximity. It was also found that the storage volume of the dam is abut 13milion m3/year this volume dictated a dimension of (15*1*0.5)mfor the subsurface dam.
URI: http://khartoumspace.uofk.edu/123456789/25349


Files in this item

Files Size Format View

This item appears in the following Collection(s)

Show full item record

Share

Search DSpace


Browse

My Account