جستجوی مقالات مرتبط با کلیدواژه "groundwater potential" در نشریات گروه "مهندسی آب"

Determining the proper locations for groundwater extraction in a region by using field observations, geo electric, geophysics and other similar methods, requires considerable time and cost. Determining the appropriate range and locations using existing data can play an important role in managerial decision making and decreasing the negative environmental impacts of groundwater resources extraction. In the current research, required data from organizations, field studies, and Geographic Information System (GIS) were prepared. Then, the potential of groundwater resources was obtained using the ArcGIS software, DEMATEL and Analytical Network Process (ANP) as a powerful Multi-Criteria Decision Making (MCDM) methods. ANP and DEMATEL methods have been used to determine the weight of different themes and their categorization classes to identify the potential groundwater abstraction area. Consequently, the study area was divided into seven sub basins in terms of potential of groundwater resources and change in groundwater consumption, using GIS software. Results showed that 1.94% of the basin has very weak potential, 21.5% weak potential, 39% average potential, 22% good potential, 11% very good, 4.54% excellent and 0.11% of it has a very high potential for groundwater extraction. Moreover, results indicated that land use change to agriculture and urban areas, which reduces the level of groundwater resources recharge, and high agricultural exploitation from groundwater sources were identified as the main causes of groundwater resources threatening in the studied basin.

Due to extensive withdrawal from alluvial aquifers all around the Hezarmasjed mountains and less available water for different consumptions, it is essential to study and investigate the Karstic aquifers as an important water resource for meeting water demands. The main purpose of this paper was to identify and evaluate the potential of groundwater resources, especially in carbonate formations, in the Northern part of Hezarmasjed Mountains. To achive this propose, the maps of lithology, distance from intersection fracture, fracture density, distance from fracture, vegetation cover, slope and rain were prepared in GIS environmentbased on available geological, hydrogeological, structural, physiographical, topographical, and climatic data and using Satellite images (IRS and ETM+). These maps of different layers were converted to maps with the same scale using fuzzy membership and analytical hierarchy process (AHP). Then, the final groundwater potential zoning map was prepared, with respect to the importance of each maps, using the index and gamma Fuzzy overlying models. The evaluation of the different overlaying models, according to its correlation with springs’ layer and to the apparent resolution of the final maps, indicate that the gamma Fuzzy overlaying method is the best, comparing to other methods.