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首页> 外文期刊>Journal of the American Water Resources Association >Impact of Urban Growth and High Residential Irrigation on Streamflow and Groundwater Levels in a Peri-Urban Semiarid Catchment
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Impact of Urban Growth and High Residential Irrigation on Streamflow and Groundwater Levels in a Peri-Urban Semiarid Catchment

机译：城郊半干旱流域的城市增长和高住宅灌溉对流量和地下水位的影响

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摘要

The impact of urbanization on groundwater is not simple to understand, as it depends on a variety of factors such as climate, hydrogeology, water management practices, and infrastructure. In semiarid landscapes, the urbanization processes can involve high water consumptions and irrigation increases, which in turn may contribute to groundwater recharge. We assessed the hydrological impacts of urbanization and irrigation rates in an Andean peri-urban catchment located in Chile, in a semiarid climate. For this purpose, we built and validated a coupled surface-groundwater model that allows the verification of a strong stream-aquifer interaction in areas with shallow groundwater, higher than some sewers and portions of the stream. Moreover, we also identified a significant local recharge associated with pipe leaks and inefficient urban irrigation. From the evaluation of different future scenarios, we found a sustainable water conservation scenario will decrease the current groundwater levels, while the median flow reduces from 408 to 389 L/s, and the low flow (Q(95%)) from 43 to 22L/s. Overall, our results show the relevance of integrating the modeling of surface and subsurface water resources at different spatial and temporal scales, when assessing the effect of urban development and the suitability of urban water practices.
机译：城市化对地下水的影响不容易理解，因为它取决于多种因素，例如气候，水文地质，水管理实践和基础设施。在半干旱景观中，城市化进程可能涉及高耗水量和灌溉量的增加，这反过来可能有助于补给地下水。在半干旱气候下，我们评估了位于智利的安第斯郊区集水区的城市化和灌溉率对水文的影响。为此，我们建立并验证了一个耦合的地表-地下水模型，该模型可以验证地下水较浅的地区（高于某些下水道和部分河流）的强流—蓄水层相互作用。此外，我们还发现了与管道泄漏和低效率的城市灌溉相关的大量当地补给。通过对不同未来方案的评估，我们发现可持续的节水方案将降低当前的地下水位，而中位流量从408降至389 L / s，低流量（Q（95％））从43降至22L / s。总体而言，我们的结果表明，在评估城市发展的影响和城市用水实践的适用性时，整合不同时空尺度上的地表和地下水资源建模的相关性。

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