Son yüzyılda hızla artan nüfus ve endüstrileşme nedeniyle tatlı su kaynaklarına olan talep artmaya devam etmektedir. Suya olan talep artışı, sınırlı olan temiz su kaynaklarının sürekli izlenme ve kontrol altında tutulmasını gerektirir. Bu çalışma kapsamında, İç Anadolu bölgesinde yer alan Eskil Ovasındaki yeraltı suyu kaynaklarının su kalitesi fiziksel-kimyasal veriler ve jeoistatiksel yöntemlerle incelenmiştir. Bu araştırmanın amacı, su kalitesi yönünden karışıklıkları önlemek için bir model (su kalite indeksi) geliştirmek ve yüksek su kalitesine sahip alanları belirlemektir. Bölgedeki yeraltı suyu kalitesini değerlendirebilmek amacı ile 21 farklı sulama kuyusundan su örnekleri toplanmış ve veriler Analitik Hiyerarşi Süreci (AHP) yardımıyla değerlendirilmiştir. Çalışma alanının su kalite indeksi fiziksel, kimyasal, ağır metal ve organic parametreler adı altında sınıflandırılan dört ana faktör ve onsekiz farklı alt kriter (su kalite parametresi) dikkate alınarak oluşturulmuştur.Yeraltı suyu kalite haritaları AHP modellerinden elde edilen su kalite indeksleri ve Kriging metot kullanılarak çizilmiştir. Her bir harita için yedi farklı semivariogram model test edilmiş ve en uygun model ortalama karekök hata yöntemi kullanılarak seçilmiştir. Yeraltı suyu kalite haritalarında verilen yeraltı suyu kalite indeksi çok yüksek, yüksek, orta ve düşüksu kalitesi şeklinde sınıflandırılmıştır. ESKİ değerinin 0.075 den büyük olduğu çok yüksek-yüksek su kalitesine sahip alanlar inceleme alanının güneybatısında bulunmaktadır.
This study aims to investigate hydrogeological, geochemical and geotechnical properties of the Aksaray University campus area. Within this context, the hydrogeochemical results of water samples collected from 4 different water points from the campus area, geochemical analysis of 17 soil samples, and geotechnical properties of rock samples obtained from drill core and description of core-logging performed in 2008 were evaluated. Hydrogeological studies have shown that two different water facies with Na-Cl and Ca-Cl water types developed in the study area. These waters are classified as low quality, but usable, and 3 rd quality for irrigation water according to irrigation water standards and electrical conductivity values. According to geotechnical experiments, it was determined that the argillaceous limestone, which spread widely under the cover of the campus area, had bearing capacity of 36.5 kg/cm 2 and belonged to the low strength rock class. As and Pb contents of the soil samples are at higher values, compared to the average upper crust values. According to the anomaly distribution maps prepared for Cl and Na elements, it was determined that east, southwest and northwest parts of the campus area contain higher values of Na and Cl than that of other parts of campus. The results of this study will provide more planned and efficient green-area studies to be carried out in the campus area and protection of the green-areas.
In this article, the temporal and spatial development of probable sinkholes in the close vicinity of a couple of sinkholes that occurred in 2007 and 2018 in the Kozaklı (Nevşehir) geothermal field, which is one of the most important thermal tourism centers where treatment with radon gases and mud can be carried out in Central Anatolia, was investigated using the multi-electrode resistivity method and core drilling data. The primary geothermal water aquifer consists of Palaeozoic aged marbles, the secondary Eocene aged limestone aquifer and cover rocks are the impermeable units of the area. Geothermal waters gain heat by geothermal gradient, granitic intrusions, and radiogenic ways. The depths, temperatures, and pH values of the wells belonging to geothermal water resources vary between 60 and 1493 m, 45 and 96 °C, as well as 6.22 and 6.61, respectively. Two-dimensional electrical resistivity methods were used to determine the dimensions of the collapse structures. In the geophysical studies examining the depths of 15-30 meters, surface fractures around the sinkhole, a subsidence structure nearby the active highway approximately 20 meters to the east, travertine was found around the pothole, especially in the east and north of the hollow structure. This data verified with log data obtained from core drilling. These findings are indicators for the ongoing karstification process.
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