تحليل النماذج الرقمية لدراسة الانحدارات الأرضية في قطاع السلمان جنوب محافظة المثنى باستعمال تقنيات الاستشعار عن بعد ونظم المعلومات الجغرافية

الملخص EN

The study adopts the techniques of remote sensing (RS) and geographic information systems (GIS) as a basis for the cartographic representation of the land slopes within the Al-Salman district and then analyzed it geomorphologically.

(310.20 - .0 = - 290.20 - .0 =) north, and longitude (450.30 - .0 = - 440.0 - .0 =) east with an area of (17463.84 km2).

The study used three satellite scenes from the data of the American satellite (Landsat 8), and the DEM (Digital Elevation Model) files were relied on with an accuracy of (30 m), and it relied on the geographic information systems program (Arc GIS V.10.3) and the program (ERDAS 2014) in drawing, improving, showing and diagnosing the spectral characteristics of the visuals to serve the study.

From the analysis of numerical regression models by means of the GIS program, the severe Hill Shade refers to areas with large slopes, which appear more clearly in the Salman depression and deep valleys as well as the case for depression with large extensions.

Their values range between (173-0) and are symbolized by the color black.

They constituted a percentage of (24.16%) of the total area of the study area, the directions of slopes in the study area is nine directions.

The Northeast lands recorded the largest area with a percentage of (13.52%).

In terms of curvature, the percentage of concave directions reached (29.54%) and convex directions (15.28%) of the total area of the study area