DETERMINATION OF GROUNDWATER POTENTIAL ZONE USING AHP BASED ON GIS FOR KONYA, TÜRKİYE

Year 2024, Volume: 12 Issue: 4, 848 - 865, 25.12.2024

Tahsin Baykal , Dilek Taylan , Özlem Terzi

https://doi.org/10.21923/jesd.1495305

Abstract

Groundwater provides most of the freshwater needs such as drinking, irrigation and industry. As a result of increasing population, urbanization and industrialization, groundwater resources are faced with the risk of decreasing and pollution. In addition, exploited usage of irrigation water from groundwater during agricultural activities causes the formation of sinkholes. For this reason, Konya in Türkiye, having a lot of agricultural activities and common sinkhole formations, was chosen as the study area. This research utilized the analytical hierarchy process (AHP), a type of multi-criteria decision-making analysis, to assess the groundwater potential in Konya, Türkiye. For this purpose, land use, slope, rainfall, topographic wetness index, drainage density, elevation, plan curvature, profile curvature and stream power index thematic maps were created, and their weights were determined with AHP. Groundwater potential map (GWPM) was produced by overlay analysis in GIS environment. The GWPM was validated by comparing it with the groundwater zones (GWZ) map given in the report of “Konya Closed Basin Management Plan” project. As a result of the validation process, the accuracy value was found to be 0.87.

Keywords

Groundwater, Analytical Hierarchy Process, GIS, Konya, Türkiye

KONYA İÇİN CBS TABANLI AHP KULLANILARAK YERALTI SUYU POTANSİYEL BÖLGESİNİN BELİRLENMESİ

Abstract

Yeraltı suyu, içme, sulama ve sanayi gibi tatlı su ihtiyaçlarının çoğunu karşılar. Artan nüfus, kentleşme ve sanayileşme sonucunda yeraltı suyu kaynakları azalma ve kirlenme riskiyle karşı karşıyadır. Ayrıca tarımsal faaliyetler sırasında yeraltı suyundan sulama suyu kullanılması, obruk oluşumuna neden olmaktadır. Bu nedenle, Türkiye'de çok sayıda tarımsal faaliyetin gerçekleştiği ve yaygın obruk oluşumlarının bulunduğu Konya, çalışma alanı olarak seçilmiştir. Bu araştırmada, Türkiye'nin Konya kentindeki yeraltı suyu potansiyelini değerlendirmek için çok kriterli karar verme analizi türlerinden biri olan analitik hiyerarşi süreci (AHP) kullanılmıştır. Bu amaçla arazi kullanımı, eğim, yağış, topografik ıslaklık indeksi, drenaj yoğunluğu, yükseklik, düzlem eğriliği, profil eğriliği ve akarsu güç indeksi tematik haritaları oluşturulmuş ve ağırlıkları AHP ile belirlenmiştir. Yeraltı suyu potansiyeli haritası (GWPM), CBS ortamında bindirme analizi ile üretilmiştir. GWPM, "Konya Kapalı Havza Yönetim Planı" projesi raporunda verilen yeraltı suyu bölgeleri (GWZ) haritası ile karşılaştırılarak doğrulanmıştır. Doğrulama işlemi sonucunda doğruluk değeri 0.87 olarak bulunmuştur.

Keywords

Yeraltı Suyu, Analitik Hiyerarşi Süreci, CBS, Konya, Türkiye

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