Document Type : Original Article
Authors
1
Master of Science in Department of Soil and Water Conservation and Watershed Management, Agricultural Research and Natural Resources Center, Kerman Province, Agricultural Research, Education and Development Organization, Kerman, Iran.
2
1Assistant Professor, Department of Soil Conservation and Watershed Management Research, Kerman Agricultural and Natural Resource Research Center, Agricultural Research, Education and Extension Organization, Kerman, Iran.
3
Assistant Professor, Department of Soil Conservation and Watershed Management Research, Kerman Agricultural and Natural Resource Research Center, Agricultural Research, Education and Extension Organization, Kerman, Iran.
Abstract
The development of the underground dams is essential in the water supply and storage for different climates especially desert areas, and can be great help. Geoelectric samples were carried out in Kahnouj Shah Strait in two stages and a total of 6 electric sondages with different distances in the area of the project. Then, the obtained data were processed using IPI2WIN software. After preparing geological, slope and land use maps in each region and combining them using Boolean logic, areas that are suitable for underground dam construction in terms of geology, slope and land use were identified in a combined map. According to the results of the geoelectric sondages and field evidences, the bed stone at the proposed option have dense clay and many salts, the impact depth on the bed stone has been measured at least 3 to 12.6 meters. The highest depth of alluvial was related to the sondage 185, and in spite of the alluvial terrace located on the northern bank of the river, the measurements depth in this section was only 4.7 meters that indicating the high bet stone in this section. Sondage 149 indicates the presence of wet alluvial layer near the earth's surface. The results of the samples show that the electrical resistance of different layers is mainly less than 30 ohm/m and the values above 60 ohm/m are seen rarely and only there are in the surface layers, which is due to fine grain texture and high density of sediments as well as water salinity. Due to the limitation of river bed width, high bed stone and also the presented materials regarding the limited permeability of alluvial sediments, it seems that there is no minimum condition for establishing a suitable reservoir for underground dam in this option.
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