Modeling and evaluation of Siverek (Şanlıurfa) groundwater potential by GIS and TOPSIS method

Year 2025, Volume: 29 Issue: 2, 299 - 315, 16.06.2025

Veysel Aslan

https://doi.org/10.29050/harranziraat.1635968

Abstract

In addition to being an important part of the hydrological and hydrogeological systems in its area, it is an important strategy in terms of protecting and developing the gradually depleted groundwater within the resources. It is inevitable to evaluate the groundwater potential and quality of the Siverek basin for gains such as determination of water supply and distribution. Therefore, the mechanism of groundwater should be determined by sensitive hydrological and hydrogeological modeling studies. While current groundwater studies can explain groundwater hydraulics and hydrology, there is little literature on groundwater behavior under variable parameters and different scenarios involving surface water and groundwater interactions. In this study, the TOPSIS method based on the GIS program modeling the groundwater flow was used and the evaluation parameter weights were calculated using MCDM methods. By comparing the parameters with each other, the weights of the criteria were determined by the TOPSIS method. A total score was determined according to the evaluation form for 8 different suggestions entered into the system, such as rainfall, aquifer, slope, drainage density, soil type, geology, geomorphology. The highest scoring parameters were ranked in both methods. In the last stage, the parameters were evaluated and an order of superiority was determined for the ideal solution. The study was concluded by comparing the methods among each other.

Keywords

GIS software program , Hydrological and Hydrogeological system , Siverek basin , TOPSIS method

Siverek (Şanlıurfa) yeraltı suyu potansiyelinin CBS ve TOPSIS yöntemiyle modellenmesi ve değerlendirilmesi

Abstract

Bölgesindeki hidrolojik ve hidrojeolojik sistemlerin önemli bir parçası olmasının yanı sıra kaynaklar içerisinde giderek tükenen yeraltı sularının korunması ve geliştirilmesi açısından da önemli bir stratejidir. Siverek havzasının yeraltı suyu potansiyeli ve kalitesinin, su temini ve dağıtımının belirlenmesi gibi kazanımlar için değerlendirilmesi kaçınılmazdır. Bu nedenle yeraltı suyunun mekanizmasının hassas hidrolojik ve hidrojeolojik modelleme çalışmalarıyla belirlenmesi gerekmektedir. Mevcut yeraltı suyu çalışmaları yeraltı suyu hidroliğini ve hidrolojisini açıklayabilse de değişken parametreler ve yüzey suyu ile yeraltı suyu etkileşimlerini içeren farklı senaryolar altında yeraltı suyu davranışı hakkında çok az literatür bulunmaktadır. Bu çalışmada yeraltı suyu akışını modelleyen GIS programına dayalı TOPSIS yöntemi kullanılmış ve değerlendirme parametre ağırlıkları MCDM yöntemleri kullanılarak hesaplanmıştır. Parametreler birbirleriyle karşılaştırılarak kriterlerin ağırlıkları TOPSIS yöntemi ile belirlemiştir. Yağış, akifer, eğim, drenaj yoğunluğu, toprak tipi, jeoloji, jeomorfoloji gibi sisteme girilen 8 farklı öneri için değerlendirme için değerlendirme formuna göre toplam puan belirlenmiştir. Her iki yöntemde de en yüksek puan alan parametreler sıralanmıştır. Son aşamada parametreler değerlendirildi ve ideal çözüm için üstünlük sırası belirlendi. Çalışma, yöntemlerin birbirleriyle karşılaştırılmasıyla sonuçlandırıldı.

Keywords

Hidrolojik ve Hidrojeolojik sistem , Siverek havzası , TOPSIS yöntemi , CBS yazılım programı

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