SPATIAL ANALYSIS OF THE CHARACTERISTICS OF THE AL-SHUWEJA MARSH USING GEOGRAPHIC INFORMATION SYSTEMS (GIS).

Abstract

The Shuweija Depression is a water body and a natural depression located north of the city of Kut, at a distance of (10) km, and extends parallel to the Tigris River, with a length of about (5) km and a width of (25) km.with rectangular shape and is filled with rain and torrential waters that reach it from valleys such as Wadi Harran, Tarsag, Shurshirin, Kanjan, Jum and Kafi rivers, and their combined annual discharge. Likewise, water reaches it through Kilal Badra from the east and Kilal Tarsakh from the north. A part of the marsh water is drained by irrigation and evaporation, and the other part goes to the Tigris River, and the percentage of salts in addition to the salinity of the soil rises. Its area is (292.288) km 2, with its highest discharge in Kilal Badra reaching (68.76) m 3 / s. The formation of the Al-Shuweja marsh for geological and morphological reasons, the chemical and physical characteristics of the depression of the Al-Shuweja marsh in Wasit governorate were analyzed for the wet and dry seasons, as it reflects the chemical characteristics of the water About the composition of the strong building and its quality resulting from the dissolution of many elements, gases and particulate matter, as well as human influences, and there is a different variation of water in its chemical compositions from one region to another and from one season to another as it interacts with the soil and thus works on the decomposition of rocks and when the water is exposed to evaporation leads to an increase salt concentration in it. Therefore, the study of the chemical properties of water and its changes is of great importance in evaluating the water resources in the region.