برهان خلف: مکان گزینی سدهای زیرزمینی

  1. Introduction   Underground reservoir, a new method for controlling runoff in the arid and semi-arid   Underground dams to control the flow of surface water (runoff) and its penetration into the groundwater reserves are increasing and strategies for the provision and development of water resources in these areas.   In this study, we Given the importance of underground dams in the province of Kerman, Storage and maintenance of water quality and the occasional rain and humidity conditions in the region, Identify places where water can be stored using this method and to prevent its loss.    2. Research methodology:   This research was a descriptive - analytic study that is based on field studies and analysis of digital graphics and the method argument is the successor to locate underground dam . Note that the posterior part of the argument is used to prove it, First single location for all sub-basins factors are considered when a sub-basins was one of the conditions, the raise will be removed sub-basins, Finally, the area that contains all of the most suitable will be selected in order to locate underground dam.    Depiction of:   Zahra Nazeri   Map Guide:   Boundaries of the   Sub-basins     As Map:   Show sub-basins   Amer Tapeh    Fig. 1 sub-basins Amer Tapeh.     3. The most effective measures in locating groundwater dam :   The most important parameters that determine the suitable location for the construction of underground dams in the study area was assessed are as follows :    3.1- Indicators of climate   Due to the high evaporation basin average annual precipitation is 249 mm and 212 mm and the mean annual temperature is 18 ° C, Domarten semi-arid climate of the region is considered. The Amer Tapeh Basin climate is suitable for underground dam.    3.2- Runoff   The annual discharge of the basin, the hydrological balance was calculated using. (Table 1). The results of these calculations indicate that all groundwater basins have the potential dam. The basin have enough water for storage Amer Tapeh.      (Table 1), the amount of current flowing in the area sub-basins Amer Tapeh.   Flowing water, million cubic meters   R (m (   λ   The average precipitation (m)   Average temperature,   ° C   Subbasins   Row   7.68   0.0084   0.25   0.182   22.42   C1   1   5.54   0.009   0.26   0.192   21.08   C2   2   11.91   0.013   0.29   0.210   18.61   C3   3   1.14   0.012   0.28   0.203   19.59   C4   4   3.23   0.015   0.30   0.217   17.70   C5   5   19.15   0.016   0.31   0.220   17.32   C6   6   29.77   0.018   0.34   0.231   15.78   C7   7   79.10   0.014   0.29   0.212   18.37   CT   8     3.3- Permeability and Fault :   C7 sub-basins of igneous rocks covered more surface area. These organizations do not have good permeability and fracture occurred at the fault Thrud is named, The fault is actually a type of stair stepper is a Grabn terrace level has created a page to the creation. This would reverse fault traps instead of water and cause water leakage. The surface of the sub-basins clastic igneous rocks covered. These organizations do not have good permeability to a depth of about 0.5 meters to 0.5 meters depth of the igneous rock covered with impermeable Neogene sediments is The situation is quite rocky so will remove the sub-basins of the sum of the other sub-basins and groundwater conditions are of dam.    3.4- Slope   Where the underground dam slope under consideration is 0.2 to 5%.( Gezahegne ,1986). So sub-basins c4 and c6 are excluded from the total sub-basins.    3.5- Water Resources   The main water source wells and subterranean farm fath-Abad and Hossein Abad village is located in sub-basins of C2 . So sub-basins will remove the collected c2.    3.6- The geomorphology   According to research (Nilsson 1384) in underground dams and because of groundwater for drinking or irrigation water behind the dam is used. This volume of 13,000 to 1,000,000 cubic meters of water storage dam for irrigation projects in arid and semi-arid with an economic justification is given. This comment sub-basins c1 and c5 are excluded from the total sub-basins.     4. Conclusions   As a result, the seven sub-basins of the watershed Amer Tapeh six factors were examined in each of these items, the sum of the following watershed sub-basins were removed. In the area of ​​underground dams were removed without proper conditions ultimately the c3 sub-basins were suitable for underground dam .    (Table 2): Results of Barrier Factors in locating groundwater sub-basins Amer Tapeh   Geomorphology   Aqueduct   Slope   Fault and permeability   Runoff   Climate   Sub-basins   ×   P    P    P    P    P   C1    ×   P   P   P   P   C2   P   P   P   P   P   P   C3     ×   P   P   P   C4   ×   P   P   P   P   P   C5     ×   P   P   P   C6      ×   P   P   C7     Keywords : underground dams, Amer tapeh, Thrud River, location.