Civil Engineering / İnşaat Mühendisliği

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Author: search.filters.author.Baba, AlperSubject: search.filters.subject.GAP

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  • Article
    Citation - WoS: 40
    Citation - Scopus: 44
    Geological and Hydrogeochemical Properties of Geothermal Systems in the Southeastern Region of Turkey
    (Elsevier Ltd., 2019) Baba, Alper; Şaroğlu, Fuat; Akkuş, I.; Özel, Nedret; Yeşilnacar, Mehmet İrfan; Nalbantçılar, Mahmut Tahir; Demir, Mustafa Muammer; Gökçen, Gülden; Arslan, Ş.; Dursun, N.; Uzelli, Taygun; Yazdani, Hamidreza
    The Anatolia region is one of the most seismically active regions in the world. It has a considerably high level of geothermal energy potential thanks to its geological and tectonic settings. The Southeastern Anatolia Region (GAP) is located in the south of Bitlis-Zagros Suture Zone (BZSZ) which is in the Arabian foreland. During the neotectonic period, the folded structures have been developed under the influence of tectonic compression from the Upper Miocene in the GAP Region where it is closely related to active tectonics. These tectonic activities produce more geothermal resources. Few studies have been carried out in this region for geothermal energy. Limited portions of the geothermal resources have been used both for thermal tourism and greenhouses in the GAP region. The aim of this study is to determine geological, tectonic and hydrogeochemical properties of a geothermal system in the GAP Region. The result indicates that the surface temperatures of geothermal fluids are from 20 to 84.5 °C A large number of abandoned oil wells, whose temperature reaches 140 °C, are found in the region. Also, hydrogeochemical results show that deep circulated geothermal fluids are enriched with Na-Cl and shallow geothermal system fluids have Na−HCO 3 and Ca-SO 4 characters because of cold water mixing and water-rock interaction. Cold waters are generally of Ca-Mg−HCO 3 and Ca−HCO 3 type. Cation geothermometers were used for determining reservoir temperature of the geothermal resources in the region. The results show that the reservoir temperature of these geothermal resources ranges from 50 °C to 200 °C. The isotope data (oxygen-18, deuterium and tritium) suggests that geothermal fluid is formed by local recharge and deep circulation.
  • Article
    Effect of Irrigation System on Groundwater Resources in Harran Plain (southeastern Turkey)
    (David Publishing Company, 2019) Özel, Nedret; Bozdağ, Şaziye; Baba, Alper
    Irrigated agriculture is the largest consumer of groundwater resources. The interaction between agricultural irrigation and groundwater resources, both in quantity and quality, is often understood later than when the adverse effects starts. For more efficient and sustainable utilization of the limited water resources, improved understanding of how respond to irrigation is essential. The Southeastern Anatolia Project (Turkish: GAP) is a major and comprehensive initiative in Turkey. The GAP was a programme to develop water and land resources in the region and planned as a package that comprised 13 individual projects on irrigation and energy production on the Euphrates-Tigris basins. This project includes irrigation networks for an area of approximately 1.8 million hectares. One of the important project sites is Harran Plain having the biggest groundwater resources and the largest irrigation field in the GAP region. Harran Plain has 3,700 km2 drainage area, 1,500 km2 plain area and 476,000 hectares of irrigation area. Before this project, the irrigations could potentially lead to about 2 m/year decline in groundwater table. After this project application, hydrodynamic system of groundwater has changed. The groundwater level has risen since 1995 in plain. In addition hydrodynamic system has been effected groundwater quality. Results show that a proper irrigation rotation system can implement an efficient water management over the irrigated areas and lead smaller groundwater change and its quality.