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    Evaluation of hydrological and hydrogeological characteristics affecting the groundwater potential of Harran Basin
    (Springer Heidelberg, 2020) Celik, Recep; Aslan, Veysel
    The Harran Basin is in the Upper Mesopotamia territory, and it is an important basin, in which agricultural activities have been conducted for more than 4000 years. This basin has the most valuable lands of not only Turkey but also the Middle East. Within the framework of the GAP project, the agricultural activities are maintained through the water provided from the Ataturk Dam, employing the irrigation in the plain via surface irrigation and in other places via groundwater. Therefore, it is of vital importance for the provision of sustainable water resources to determine the hydrological and hydrogeological characteristics feeding the groundwater, which is the alternative water resource of the basin. In this study, DEM, geomorphology map, slope, drainage, and drainage density maps were produced as the hydrogeological parameters of the Harran Basin, and geology, groundwater level map, and thematic maps demonstrating the aquifer status were produced as the hydrogeological characteristics. With the help of these maps, the groundwater and surface water resources are evaluated. This study aims to evaluate parameters such as drainage density (DD), geomorphology, geology, rainfall, slope, and land use (LU) which affect the formation of groundwater and to correlate with groundwater yield maps obtained from drilled boring data in the basin. The ArcGIS 10.2.2 program, Arc Hydro, and Spatial analyses extension were used to obtain hydrological and hydrogeological thematic maps. The study concludes the most groundwater potential area remains a fertile region where the slope is lowest, and the geomorphological flat plain has a high drainage density rate in which infiltration was more intense. The region equally has a geologically appropriate aquifer.
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    Öğe
    Mapping of groundwater potential zones in the Diyarbakir city center using GIS
    (Springer Heidelberg, 2015) Celik, Recep
    Areas of city centers are increasing rapidly, as a result of increasing population correspondingly urbanization and expansion of axis of urbanization. This situation threats cultivated areas and groundwater basins close to city centers. Especially in consequence of industrialization and urbanization groundwater basins are threatened by pollution. Therefore, clean and usable surface water and especially groundwater must be regularly monitored and protected. Nowadays and in the future, the most important water source is groundwater. Geographic Information System (GIS) is an extremely popular computer program in recent years. Data is continuously updated with GIS, data cannot be acquired also can be analyzed modeled by this computer program. In our study, Diyarbakir city center, which is located on the Tigris river basin, groundwater potentials, and static water levels was examined and modeled by using GIS programmer. Firstly, general geological data, meteorological data, and general information about natural water sources are collected together, afterwards logs of well drilled by public institutions and private individuals within the Diyarbakir city center are analyzed. Static water level, dynamic water level, and pumps productivity rates are classified in these logs. Then, thematic maps produced with the help of Arc Info Professional GIS programmer. Groundwater source potential of Diyarbakir examined with by means of these thematic maps. In hydrogeological research, productivity by aquifer features, water retention capacity, and groundwater level data evaluated with geological structure of area are taken into consideration.
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    Öğe
    Temporal changes in the groundwater level in the Upper Tigris Basin, Turkey, determined by a GIS technique
    (Pergamon-Elsevier Science Ltd, 2015) Celik, Recep
    Groundwater is an important water source widely used for agricultural, domestic, and industrial activities in the world. Increase in population, immoderate use of groundwater in agriculture, and irregular rainfall due to climate change all have a negative effect on groundwater potential. It is important to determine the groundwater potential of every basin to regularly monitor static water level changes. In this study, static water level (SWL) changes in the groundwater of the Upper Tigris Basin, which is located between the Diyarbakir Plain and northern Batman, Turkey, has been analyzed for the period 1980-2011 and modeled by using GIS techniques on the other hand, static groundwater levels identified with GIS were used at the end of each study period to determine changes in these levels. Finally, possible reasons of changes in groundwater levels were discussed. (C) 2015 Elsevier Ltd. All rights reserved.