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Watershed Delineation from DEM by Model Builder in ArcGIS

Ali Sadiq Abbas

Abstract


The water level fluctuates continuously at local, continental, and global levels. Consequently, remote sensing offers extensive data for assessing the location, extent, and variability of change, including the causes and changes that occur and the reactions and repercussions of change. Considering the significance of the water level, this research focuses on describing the methodology and process to determine the water level in the Al-Zab River. This study offers a straightforward and cost-effective approach and procedure for precisely delineating flood danger regions in the Al-Zab River basin utilizing a geographic information system and the existing database. The proposed strategy for regionally dispersing flood risks combines the size of prior flood events and the geographical distribution of their causes. This approach allows for the calculation of a weighted score for each participant's causative component. The regional distribution of the flood hazard intensity level is obtained by categorizing the spatial patterns of the flood hazard index. The 30-m digital elevation model with a high resolution was utilized to evaluate the water level in this river. Furthermore, this work is considered the first step towards enhancing information management in the studied area. This study mainly aims to explain how to outline and define watersheds using ArcGIS for flood mapping.

 

Doi: 10.28991/CEJ-2023-09-11-011

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Keywords


Watershed; Al-Zab River; DEM; Flood Danger; RS and GIS; SRTM.

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Full Text: PDF

DOI: 10.28991/CEJ-2023-09-11-011

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Copyright (c) 2023 Ali Sadiq Abbas

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