Geomorphometric Analysis of Abu Dalaih Valley Basin Using Geomatics Techniques and the Possibility of Investing it for Water Harvesting Purposes

Abstract

The study included a hydrogiomorphological evaluation of Abu Dalaya basin in Al-Jezira region for the water harvesting purposes, which an area reached (227 km2). Abu Dalaya basin contains three secondary basins, which are almost similar in their morphometric and ذذذذذذذذذذذالباحثةذدجىذعليذبركات ذذذذذذذذذذذذذذد.ذخالدذصبارذحممدذ التحليلذاهليدرومورفومرتيذحلوضذواديذابوذ داليهذبادتخدامذتقنياتذاجليوماتكسذ ) 090) hydrological characteristics, and most of them are close to the rectangular shape. The researcher used the integration between several data, such as Remote Sensing (RS) data, climate and ground data for the study area and its region, whereby the outputs from maps and figures were obtained by using Geographic Information System (GIS). For the purposes of water harvesting, the study adopted (SCS-CN) model to estimate the volume of surface runoff, and the results indicated that the study area is characterized by high runoff due to the presence the soils type(C) that are characterized by their inability to infiltrate water into the soil.The hourly data for the season (2018-2019) showed that the amounts of rain were large, ranging between (652-761 mm). Thus, this amount of water must be preserved, and thus four sites were chosen for the construction of earth dams in the study area. In addition, the results of those proposed dams for water harvesting proved that the quantities of water storage in them are uneven, but very large and sufficient for the various types of future investments..