GIS-BASED AHP-OWA APPROACH FOR LOCATING SUITABLE SITES FOR WATER HARVESTING DAM IN QASSIM REGION, SAUDI ARABIA

Abstract

‫الملخص‬ ‫معقدة‬ ‫قرار‬ ‫اتخاذ‬ ‫عملية‬ ‫هو‬ ‫المياه‬ ‫حصاد‬ ‫سدود‬ ‫مواقع‬ ‫إختيار‬. ‫حيث‬ ‫إ‬ ‫المعايير‬ ‫تقنية‬ ‫دمج‬ ‫يتطلب‬ ‫األفضل‬ ‫الموقع‬ ‫إيجاد‬ ‫ن‬ ‫الجغرافية‬ ‫المعلومات‬ ‫نظم‬ ‫مع‬ ‫المتعددة‬. ‫على‬ ‫باالعتماد‬ ‫الجغرافية‬ ‫المعلومات‬ ‫نظم‬ ‫استخدام‬ ‫تم‬ ‫البحث‬ ‫هذا‬ ‫في‬ ‫تقنية‬ AHP-OWA ‫السعودية‬ ‫في‬ ‫القصيم‬ ‫منطقة‬ ‫في‬ ‫السدود‬ ‫لبناء‬ ‫مواقع‬ ‫أفضل‬ ‫اليجاد‬. ‫استخدامات‬ ،‫الحوض‬ ‫انحدار‬ ‫اعتماد‬ ‫تم‬ ‫التخاذ‬ ‫كمعايير‬ ‫المخدمة‬ ‫للمناطق‬ ‫والمسافة‬ ،‫الطرق‬ ‫إلى‬ ‫المسافة‬ ،‫األمطار‬ ‫توزع‬ ،‫السطح‬ ‫جيولوجية‬ ،‫التربة‬ ‫نوع‬ ،‫األراضي‬ ‫القرار‬. ‫أن‬ ‫القرار‬ ‫لمتخذ‬ ‫السماح‬ ‫مع‬ ،‫المياه‬ ‫حصاد‬ ‫سدود‬ ‫لبناء‬ ‫مواقع‬ ‫أفضل‬ ‫إيجاد‬ ‫في‬ ‫الطريقة‬ ‫هذه‬ ‫أهمية‬ ‫النتائج‬ ‫أظهرت‬ ‫والمتشائمة‬ ‫المتفائلة‬ ‫بين‬ ‫مختلفة‬ ‫سيناريوهات‬ ‫االعتبار‬ ‫في‬ ‫يأخذ‬. ABSTRACT Selection of a water harvesting dam site involves a complex array of decision criteria that may have conflicting values. Finding the optimum location requires integration of the capacities of Geographic Information Systems (GIS) and Multi-criteria Decision-Making (MCDM). In this paper, a GIS-based multi-criteria decision analysis approach is used to solve this problem. The approach is based on the extension of Analytical Hierarchy Process using fuzzy quantifiers-guided Ordered Weighted Averaging operators (GIS-based AHP-OWA). This approach is applied to determine the optimal site of a water harvest dam in Qassim region, Saudi Arabia. Several factors affect the selection of the best location of the target water harvesting dam such as: slope, landuse, soil type, geology, rainfall, drainage network, distance from the road, and distance from the cities, are used. The results showed that using a combination of GIS-based AHP-OWA is proper approach for optimal water harvesting site selection, where this approach provides a generic powerful decision-making tool that allows decision-makers to define a decision strategy on a continuum between pessimistic (risk-averse) and optimistic (risk-taking) strategies.