Morphometric and Hydrological Characteristics of Wadi Abu Karisha Basin, Northeast of Ali Al Gharbi District, Using Remote Sensing and Geographic Information Systems.

The river drainage basin is the basic unit for conducting quantitative research for river basins. Measuring the morphometric and hydrological characteristics of river valleys is one of the recent developments in the field of quantitative geomorphology that relies on statistical and mathematical analysis to describe land forms. The river basin and its relationship to the factors controlling its composition on the one hand, and to the amount of water and its geomorphological effect on the other hand, and to determine the measurement of morphometric features, which include characteristics (areal, morphological and topographical) and hydrological characteristics in the Wadi Abu Karisha basin, northeast of Ali al-Gharbi district in Maysan governorate, which is located astronomically Between two latitudes (0 42 32 - 30 49 32 degrees) north, and arcs of length (0 33 46 - 30 40 46 degrees east), topographic maps were used at a scale (1: 100,000) and the satellite visualization of the sensor (Landsat 8), on (4/6) / 2019) and the digital elevation model for the year (2019) with a discriminatory accuracy (12.5 m) using the (ARC GIS 9.5) program and the (Global Mapper) program. The important conclusions about the morphometrics and hydrology of the basin, in particular, the effect of the natural characteristics on the variation of the morphometric and hydrological characteristics of the basin represented by the geological formations in it and the structural characteristics that characterize the area as well as the surface characteristics, the degree of slope and its directions, the quality and characteristics of the soil and the quality and density of the natural vegetation. The morphometrics, especially the spatial ones, contributed to influencing the morphometric and hydrological characteristics of the basin, as the basin area reached (79.2 km2), a length of (18.2 km) and an average width of (5.9 km), while the basin circumference amounted to (48.6) km, While the morphological characteristics of the basin, especially the ratio of elongation and roundness, were recorded respectively (0.99, 0.96), while the shape factor of the basin was recorded (0.21) and the ratio of ocean cohesion (1.06), and it was found that there is a close relationship between the morphometric characteristics The hydrology of the basin. [ABSTRACT FROM AUTHOR]