TY - JOUR ID - TI - The use of geographic information systems in studying the riverine levels of the Houran Valley in western Iraq استخدام نظم المعلومات الجغرافية في دراسة المراتب النهرية لوادي حوران غرب العراق AU - Prof. Jamil Abd Hamza Al-Omar AU - Arkan Mudheher AlFarhani PY - 2020 VL - 23 IS - 3 special SP - 109 EP - 126 JO - for humanities sciences al qadisiya القادسية للعلوم الانسانية SN - 19917805 25203541 AB - The research aims to use geographic information systems (GIS) in studying the levels of theriver network of the Basin of Houran valley in western Iraq through relying on the digital elevationmodel (DEM) through which a database can be established to identify the number of stream ordersand their lengths and to know some of the surveying, longitudinal, Formal and terraincharacteristics of the basin.A group of results were reached on the study area basin, including determining the total areaof the basin, which amounted to (11485) km2, and the total of the waterways that were extracted byrelying on the digital elevation model (1462) stream orders and these were at six levels from thefirst to the sixth, the basin coefficient was (0.091). The highest point in the basin of Houran valleywas (900) meters high and the lowest point (100) meters, and the basin in the study area tends toelongate more than to rotation, as the elongation ratio reached (0.340) while the rotation ratioreached (0.195). And it turns out that the river drainage pattern in the basin of Houran valley is oftree and parallel patterns

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