Multi-criteria analysis for selecting suitable sites of water harvesting in Northern Al Tharthar Watershed

Mohammed Abdaki, . and Raid Mahmood Faisal, . Multi-criteria analysis for selecting suitable sites of water harvesting in Northern Al Tharthar Watershed. pp. 218-236. ISSN 2672-7226

Water scarcity in Iraq is becoming a critical issue as demand increases particularly in arid and semi-arid regions. In response water harvesting (WH) is a promising technique that can effectively catch surface runoff and thus it could cover different water needs and mitigate droughts. The study objective is to identify and select potential suitable sites for theerection of dams for water harvesting in the northern Al-Tharthar watershed. The study focuses on building an integrated GIS-based multi-criteria model and by using Analytic Hierarchy Process (AHP) where relative importance is obtained from (AHP) through use of ArcGIS 10.5. The model combines 7 Biophysical criterions including: slope elevation stream orders annual rainfall soil texture land cover/land use and runoff zones. However 4 socio-economic criteria include: settlements and roads population and rural density agriculture density and livestock water demand. Biophysical criteria importance weighted around 84.62 whereas socio-economic importance is 15.38 in the model. The final score for the degree of suitability is produced by using Raster Calculator it includes 5 classes from very high suitability to very low suitability. The results demonstrated that the middle and northern part has medium and higher degree of suitability for water harvesting. Furthermore in the research area the medium and higher degree of suitability covers around 64.013 in contrast to 35.987 which is less suitable for water harvesting. Three potential dams have been identified as highly suitable with storage capacity from the first to the third 37 359 680.5 m 76 273 409.9 m and 9 690 685.6 m respectively.

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Abstract

Water scarcity in Iraq is becoming a critical issue as demand increases particularly in arid and semi-arid regions. In response water harvesting (WH) is a promising technique that can effectively catch surface runoff and thus it could cover different water needs and mitigate droughts. The study objective is to identify and select potential suitable sites for theerection of dams for water harvesting in the northern Al-Tharthar watershed. The study focuses on building an integrated GIS-based multi-criteria model and by using Analytic Hierarchy Process (AHP) where relative importance is obtained from (AHP) through use of ArcGIS 10.5. The model combines 7 Biophysical criterions including: slope elevation stream orders annual rainfall soil texture land cover/land use and runoff zones. However 4 socio-economic criteria include: settlements and roads population and rural density agriculture density and livestock water demand. Biophysical criteria importance weighted around 84.62 whereas socio-economic importance is 15.38 in the model. The final score for the degree of suitability is produced by using Raster Calculator it includes 5 classes from very high suitability to very low suitability. The results demonstrated that the middle and northern part has medium and higher degree of suitability for water harvesting. Furthermore in the research area the medium and higher degree of suitability covers around 64.013 in contrast to 35.987 which is less suitable for water harvesting. Three potential dams have been identified as highly suitable with storage capacity from the first to the third 37 359 680.5 m 76 273 409.9 m and 9 690 685.6 m respectively.

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Item Type:	Article
AGROVOC Term:	Water harvesting
AGROVOC Term:	Watershed management
AGROVOC Term:	Water resources
AGROVOC Term:	decision support systems
AGROVOC Term:	Land suitability
AGROVOC Term:	Hydrological cycle
AGROVOC Term:	Environmental assessment
AGROVOC Term:	Geographic information systems
AGROVOC Term:	Remote sensing
AGROVOC Term:	Water conservation
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10335

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