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首页> 外文期刊>Journal of the American Water Resources Association >Analyzing the Effects of Groundwater Pumping on an Urban Stream-Aquifer System
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Analyzing the Effects of Groundwater Pumping on an Urban Stream-Aquifer System

机译：分析地下水泵送给城市蓄水系统的影响

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摘要

When the cone of influence of a pumping well reaches a nearby river, the resulting hydraulic gradient can induce enhanced seepage of streamflow into the aquifer. The rate of seepage is often modeled using analytical solutions that are simple to apply but may not reproduce field data due to mathematical assumptions not being met in the field. Furthermore, the appropriateness of such models has not been investigated in detail due to difficulty in measuring streamflow loss in the field. In this study, a field experiment was conducted on a reach of the South Platte River near Denver, Colorado to estimate pumping-induced streamflow loss. A network of stream gauges, monitoring wells, and in situ measurements was used to observe streamflow rates, groundwater levels, and temperature to assess if pumping wells have a significant impact on streamflow, and to compare observed streamflow depletion against analytical solutions. Data collected suggest that pumping wells have a noticeable impact on streamflow. The analytical solutions proved accurate if streamflow was low and constant but performed poorly if streamflow was high and variable. Therefore, for this reach, the use of analytical solutions to predict streamflow may only be appropriate under low-flow, constant-flow conditions. Methods and results can be used to guide other streamflow depletion studies and to inform cases of pumping-induced streamflow depletion, particularly in regard to water rights.
机译：当抽水井的影响锥到达附近的河流时，所产生的水力坡度会导致水流渗入含水层的流量增加。渗透率通常使用分析解决方案建模，该分析解决方案易于应用，但由于未满足现场的数学假设，因此可能无法重现现场数据。此外，由于难以在现场测量流量损失，因此尚未详细研究这种模型的适用性。在这项研究中，在科罗拉多州丹佛市附近的南普拉特河段进行了野外实验，以估算抽水引起的水流损失。使用流量表，监测井和原位测量网络观察流量，地下水位和温度，以评估抽水井是否对流量产生重大影响，并将观测到的流量消耗与分析溶液进行比较。收集的数据表明，抽水井对水流有显着影响。如果流量低且恒定，则分析解决方案被证明是准确的;但如果流量高且可变，则分析解决方案的性能较差。因此，对于此范围，仅在低流量，恒定流量条件下使用分析解决方案预测流量可能是合适的。方法和结果可用于指导其他水流枯竭研究，并为抽水导致的水流枯竭提供信息，尤其是在水权方面。

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