نوع مقاله : مقاله پژوهشی
نویسندگان
1 دستیار پژوهشی- مرکز تحقیقات راه، مسکن و شهرسازی
2 مرکز تحقیقات راه، مسکن و شهرسازی
3 دانشکده عمران، دانشگاه علم و صنعت ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The aim of this study is to investigate the effect of clay zones on land subsidence due to groundwater overexploitation, also investigate the effect of clay zones on the recovery percentage of subsidence from artificial recharge. The finite element model has been used on aquifers with different placement positions of clay zones. In each aquifer, the water level gradually drops and the subsidence of the land is calculated, then in a certain period the water level gradually returns to its primary level and finally the recovery percentage of the subsidence is evaluated. The results show that a percentage of the subsidence can be recovered with artificial recharge, and this amount varies depending on the aquifer materials, the thickness and the location of the clay zones. Land subsidence in the sand-only aquifer is less than that of the sandy aquifer with clay zones, and about 90% of the subsidence caused in the sand-only aquifer can be recovered. The presence of clay zones increases land subsidence. In sandy aquifers with clay zones, depending on the position and thickness of clay zones, approximately 19 to 46% of the created subsidence can be covered. The time of groundwater level drop is more effective in the subsidence of sandy aquifers with clay zones, which clay zones are located at a lower depth and increase land subsidence. Also, in these types of aquifers, with the increase in the time of groundwater level drop, the recovery percentage of subsidence by artificial recharge decreased by 13% on average.
کلیدواژهها [English]
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