Characteristics of Storing Non-uniformity and Exploitation Vulnerability of Aquifers to Dewatering in The Hilly Area of The Taihang Mountains Piedmont
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Abstract:
For the issues of groundwater sustainable utilization in the hilly area of the Taihang mountains piedmont, it is expounded on characteristics of storing non-uniformity and of the vulnerability of the aquifers to dewatering in the area in the exploitation, based on the pumping test data for many times from two of 500 meters depth of bedrock fissure groundwater wells in the distance of 3.92km, through the multiple quantitative comparison method. The research results show that, not only the different between the well area of groundwater occurrence is non-uniform, and the respective two well in their hole, different depth as differences. In the time of less than 70 minutes pumping time, groundwater level decline in the ZKs-3 well is more than that in the ZKs-2 well. 70 minutes later pumping time, the decline of the ZKs-2 well is much more than that of the ZKs-3 well, and the difference between the two decline increases gradually with the pumping time increased. These results indicates that the abundance water is more much in the upper aquifers of the ZKs-2 well area and is more weak in the lower aquifers; the abundance water is more weak in the upper aquifers of the ZKs-3 well area and is more much in the lower aquifers. The exploitation vulnerability of groundwater to dewatering is different in aquifer system of different, with pumping test times increase, the maximum drawdown and groundwater level recovery time in the ZKs-2 well were increased, but the level can be fully restored to the initial level state in each time test; the groundwater level did not return to the initial level state in the ZKs-3 well, and to the initial level distance increases as the increase of the number of test, but each time of the level recovery to stable state did not significantly change. Therefore, in the hill area in groundwater resources development and utilization, reasonable design, prevent the aquifers to dewatering.
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