Integration of terrain, thematic mapper and soil quality data for surface hydrology, water erosion and land suitability modeling [electronic resource] : NW Coast, Egypt.

Includes references.

At a represent A TIVE area at Omyed, NWC, the present study aims to integrate GIS and RS technologies with soil qualities data in assessing and modeling the rain- runoff relationship, the water. erosion hazards and the land suitability for specific uses. The GIS-modeling capability was used to integrate the analysis outputs of thematic mapper image, of digital terrain, and of soil qualities to model the following: 1. Rainfall-Runoff: The rainfall-runoff relationship was estimated by using the curve number method The study indicated that a total number of 46 cisterns are required for collecting and reserve 4121 m3 in November and 19202 m3in January of runoff water for eleven natural undisturbed watersheds. 2.Water Erosion Hazards: The revised universal soil loss equation was used .The analysis showed that, about 506.23 km2 are subject to erosion rate of less than 20 tonlhalyear and about 153.31 km2 are subject to erosion rate of more than 20 tonlhalyear for the maximum "erosion hazard scenario. For the current erosion hazard scenario 567.26 km2 are subject to erosion rate of less than 20 tonlhalyear and about 92.28 km2 are subject to erosion rate of more than 20 tonlhalyear. 3. Land suitability for specific uses: Micro LEIS land evaluation model linked with GIS was used. The capability evaluation indicated that, about S2 : 178.49 km2 , S3 : 188.09 km2, and N : 296.77 km2. The irrigated agriculture suitability for 12 specific land gave for olive about 9.67 km2 as S2 and 7.86 km2 as S3 for olive, for peach and citrus about 11.05 km2 as S3 and 6.39 km2 as S4 and for Wheat, Com, Alfalfa, Sunflower, Cotton, soybean, Sugar Beat, Potato and Melon about 17.44 km2 are S4. The rainfed agriculture suitability evaluation indicated that, about 366.58 km2 are class II, 292.35 km2 are class III and 4.42 km2 are class IV for rainfed agriculture.

Summary in Arabic.

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