QE484 : Evaluating the effective parameters on the variation of large karst springs discharge in Kermanshah Province
Thesis > Central Library of Shahrood University > Geosciences > PhD > 2020
Authors:
[Author], Gholam Hossein Karami[Supervisor], H. Karimi [Advisor]
Abstarct: There are many karst springs (that is called “sarab” in the local lingo) in Kermanshah province (more than 200 springs). Many of them show a significant decrease in discharge in the last three decades. An important point in this research is selecting springs with special conditions to evaluate the effects affecting their discharge. Therefore, among the important springs of the province, in the first step, 40, then 20, and finally 7 springs were selected. In selecting the selected springs, it was tried that as much as possible, springs have been selected that have a discrete catchment area and different conditions in the human activity in the neighborhood alluvial aquifer hydrologically. Lack of understanding of the impact of climate change by considering the characteristics of the aquifer and uncontrolled exploitation of the aquifer has caused many problems, including changes in groundwater flow, intense and irreversible decline in water level, and drying springs ultimately. On the other hand, in many areas, alluvial plains are recharge by karst water sources, and this relationship causes the decrease of groundwater level in alluviums to be effective on adjacent karst aquifers. The mentioned effect depends on the characteristics of the karst aquifer. Studies show that the contribution of anthropogenic activity varies from less than 5% to more than 95% in the karst springs selected. To more accurately assess the relationship between springs and groundwater level, this issue was examined for 4 springs previously dried and, according to the formula that was extracted (the MAGWL before drying springs), the obtained results matched to occurred actual data. The most important results and achievements of this research include evaluating the effect of natural factors and the effect of the anthropogenic activity, and finally combining the mentioned effects and introducing an equation to determine the contribution and effect of each of these factors. Finally, by combining human and natural factors including precipitation, karst development, and aquifer characteristics, an equation was introduced that is very closely consistent with the actual data of the springs.
Keywords:
#karst spring #Kermanshah #effective factors on karst spring discharge #anthropogenic activiteis #natural factors #minimum allowable groundwater level Keeping place: Central Library of Shahrood University
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