التحليل المورفومتري لحوض التصريف السطحي لمدينة إب ومدلولاتها الهيدرولوجية باستخدام الاستشعار عن بعد ونظم المعلومات الجغرافية

Abstract EN

This study presented an applied model for using GIS technology to create a digital database for the hydromorphometric characteristics of the Ibb water basin and its sub-basins depending on (DEM) and (Arc GIS 10.8).

Several results have been reached that have hydrological implications: the studied basins are considered small basins in the area extension, with a hydrological conflict between them in the areas of water division in addition to the competition between primary streams, which led to lack of development and growth of first-order sewers and their small number, and the tendency of basins to elongate.

the increase in the total length of the aquarium compared to its width with an increase in the area of the aquarium basins upstream and narrow downstream makes the shape of these basins almost look like a triangle.

hydro-logically, it is explained that the lower basin is immune to flooding, and most of the values of the morphometric variables are low and agree with each other in terms of low and hydrological implications.

in addition to the increase in the lengths of the main sewers of the basins and the shorter lengths of the secondary sewers, their small number, and their small area, its most important hydrological implications are an increase in the distance and area of water flow from the source to the estuary, the arrival of water in the form of flowing and successive batches, the length of the drainage period, the increase in water losses, and the decrease in the amount of surface runoff.

the most important results of the analysis of the hydrological flow characteristics were the low coefficient of flooding, and the short response time.