Saeideh Ansariyan; Mahnoosh Moghaddasi; Mojaba Moradi
Abstract
The success of the artificial recharge projects of aquifers need to recognition the appropriate points. The aim of this investigation is finding appropriate points for artificial recharge in “Kavir Meighan” basin in Markazi province. Because of that the Geographical Information System (GIS) ...
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The success of the artificial recharge projects of aquifers need to recognition the appropriate points. The aim of this investigation is finding appropriate points for artificial recharge in “Kavir Meighan” basin in Markazi province. Because of that the Geographical Information System (GIS) is used. In this investigation. the method“Analytic Hierarchy Process (AHP)” is used to find suitable points. By using the opinion of the experts, the necessary criterion to choose suitable points are: Water Quality, Water Depth, Slope, Land use, Geology, Soil texture and the position of wells, springs and Qanats. In AHP methods the raster layer of used criterion was prepared. Then by using double comparison and Expert choice software, the weight of the any layers was made. In this method the maps were put together by overlap methods. After that, inappropriate points those are too close to wells, springs and qanats, were showed. Finally, the potential map of artificial recharge zone was prepared. In AHP method the potential map contents 29 zones, the total area of them is 14,770,183 square meters.
Zahra Feizi; Amirreza Keshtkar; Ali Afzali
Abstract
Historically, flood control and artificial recharge are one of the most important objectives in spreading in arid and semi-arid systems. Therefore, determining suitable locations for floodwater spreading systems based on different criteria and indicators is of great importance. In this study, seven information ...
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Historically, flood control and artificial recharge are one of the most important objectives in spreading in arid and semi-arid systems. Therefore, determining suitable locations for floodwater spreading systems based on different criteria and indicators is of great importance. In this study, seven information layers (slope classes, runoff volume, transmissibility in alluvium, thickness of unsaturated zone, surface infiltration rate, quality of water and land use) were combined in GIS using AHP model and weights of each factor were determined based on membership function of each responsible factor. Then AHP map of each factor was incorporated to have the flood spreading map based on the most susceptible AHP model. The results indicated that land use (39%) was the most important criterion in suitable location mapping for floodwater spreading and runoff volume, slope classes, surface infiltration rate, thickness of unsaturated zone, transmissibility in alluvium and quality of water were in second to seventh order. The results of integration of maps showed that 70% of the study area is suitable for flood spreading.
Hassan Vagharfard; Hassan Moghim
Abstract
Flood spreading is an effective way to increase the groundwater level, rectify the critical conditions of groundwater, and prevent flooding at Naeim-Abad, Fars Province. The most important step in the successful implementation of artificial recharge is the selection of recharge areas in the studied region. ...
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Flood spreading is an effective way to increase the groundwater level, rectify the critical conditions of groundwater, and prevent flooding at Naeim-Abad, Fars Province. The most important step in the successful implementation of artificial recharge is the selection of recharge areas in the studied region. In this research, the GIS technique and Analytical Hierarchical Process (AHP) method have been used. We considered nine factors–land, slope, and distance from the road, altitude, thickness of the alluvium, distance from the stream, surface permeability, land use, and fault for analysis in this research. Each layer was prioritized using the AHP method and the different layers were integrated. Expert Choice software was used to prioritize nine considered factors. The results showed that 3.6% of the Naeim-Abad area was suitable for flood spreading based on the AHP method and GIS technique. In this research, hydrologic factors with a weight of 0.687 had the most impact among the main criteria for locating areas prone to flood spreading. Among the sub-criteria of this criterion, surface permeability with a weight of 0.558 had the greatest influence. In addition, the sub criterion of land use was weighted equal to 0.701, which had the highest weight among the sub criteria. The lowest weight among the sub criteria was attributed to the distance from the road with a weight of 0.106, which indicated the least influence on locating suitable areas for flood spreading.
Forod Sharifi; Mehdi Rahmani Jevinani; Hamid Davoodi
Abstract
The objective of this paper is introducing and applying a two-dimensional electrical tomography method in detection of water movement and evaluating the effects of watershed management measures. For these, four Dipole–Dipole profiles were designed operated and the data were recorded. These profiles ...
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The objective of this paper is introducing and applying a two-dimensional electrical tomography method in detection of water movement and evaluating the effects of watershed management measures. For these, four Dipole–Dipole profiles were designed operated and the data were recorded. These profiles included; profile A in the east-west direction, profile B and C in the north- south on the right bank upstream and downstream of the dam site and the D and E profiles, perpendicular to the river, on the right bank of the river valley. The RES2DINV software was used for two dimensional modeling. The results checked and calibrated using geological survey. Two water leakage path of a buried river channels and other stalagmites along the right bank of the river were detected. Results from profiles A indicated that fault damage zone North-South and seepage from the right abutment. The recorded resistivity of dam embankment was high; so the clay, which is used for construction of dam, is dry and shows a stable condition. The profile B was recorded at the distance of 50 meters from dam axis. A zone of low resistivity (with a dimension of 20*15 meters) was detected. This zone represents a pore space containing a high percentage of recharged water. The stored water flow slowly into other fracture zones down gradient along the watercourse. The D profile indicates the presence of buried river is the path that hydraulic gradient and direction with corresponding points A and B is consistent in the profiles. In conclusion, application of a two-dimensional electrical tomography method showed promise as a low cost and relatively quick methodology in evaluation of water movement in catchments. All in all, the effectiveness of the implemented watershed management activities was quantitatively approved by applying the aforesaid technique.
Farzaneh Ghaemizadeh; Safar Marofi; Amin Toranjian; Alireza Ildoromi; Abbas Maleki
Abstract
In many regions especially dry areas such as Iran, groundwater resources are the main sources of drinking and agricultural water. In areas where natural supply and discharge of aquifer are not balanced, the water table will be dropped and the quality and quantity of aquifer water will be affected. The ...
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In many regions especially dry areas such as Iran, groundwater resources are the main sources of drinking and agricultural water. In areas where natural supply and discharge of aquifer are not balanced, the water table will be dropped and the quality and quantity of aquifer water will be affected. The aims of present study, was to use decision support tools to provide appropriate management method for artificial recharge of Hamedan-Bahar’s aquifer, using Boolean and Fuzzy pattern in GIS environment. Also, to provide a more economical solution, the possibility of using industrial wastewater treatment in the area, has been investigated. For this purpose, seven geographical information layers including slope, land use, surface infiltration, aquifer depth, aquifer quality, net feeding and transfer capability were interpolated. The resulted output maps showed that according to Boolean pattern 2.34 percent of the lands (equivalent to 10.95 km2 of the aquifer) are located in the central and eastern areas and according to fuzzy pattern 9.44 percent of the lands (equivalent to 44.22 km2 of the aquifer) which are scattered distributed, rated very good in terms of artificial recharge of Hamedan-Bahar aquifer. Also, the results showed that the Bu-Ali industrial estate water treatment plan outlet can be used to recharge the aquifer.
