Hydrologic impact of urbanization with extensive stormwater infiltration
Hydrologic impact of urbanization with extensive stormwater infiltration
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DOI：
10.1016/j.jhydrol.2016.11.030
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发表时间：
2017
影响因子：
6.4
通讯作者：
L. Locatelli;O. Mark;P. Mikkelsen;K. Arnbjerg-Nielsen;A. Deletic;M. Roldin;P. Binning
中科院分区：
文献类型：
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作者：
L. Locatelli;O. Mark;P. Mikkelsen;K. Arnbjerg-Nielsen;A. Deletic;M. Roldin;P. Binning
本文对长达 40 年的数据集进行了新颖的建模分析，以研究城市化和广泛的雨水渗透对地下水位和流域水平衡的影响。关于大规模雨水渗透城市化对水文影响的数据集尚未广泛获得，但这一数据集很重要，因为许多城市正在考虑将渗透作为传统雨水系统的替代方案。本研究分析了西澳大利亚珀斯城市流域的地下水位观测结果。地下水观测数据涵盖了土地利用变化（特别是由于城市化）发生的大约40年的时间段；此外，监测区域包括未开发地区和城市化地区，在这些地区，雨水渗透是通过渗水井（浅垂直渗透井）进行渗透的常见做法。使用分布式动态水文模型来分析数据，以模拟地下水响应。该模型明确地将浸泡井模型与地下水模型耦合起来，以便浸泡井的性能因地下水位的增加而降低。地下水观测数据用于设置、校准和验证耦合的 MIKE SHE-MIKE URBAN 地下水模型，该模型用于量化城市化过程导致的地下水上升程度。模拟的城市化过程包括灌溉新建的私人和公共花园、由于绿地面积减少而减少蒸散量以及人工雨水渗透的发展。研究表明，城市化和雨水渗透会影响整个流域的水平衡，增加补给并减少蒸散量。这些变化导致地下水位上升，地下水渗漏到地形之上的可能性增加。
This paper presents a novel modeling analysis of a 40-year-long dataset to examine the impact of urbanization, with widespread stormwater infiltration, on groundwater levels and the water balance of a watershed. A dataset on the hydrologic impact of urbanization with extensive stormwater infiltration is not widely available, and is important because many municipalities are considering infiltration as an alternative to traditional stormwater systems. This study analyzes groundwater level observations from an urban catchment located in Perth, Western Australia. The groundwater observation data cover approximately a 40-year-long period where land use changes (particularly due to urbanization) occurred; moreover, the monitored area contains both undeveloped and urbanized areas where stormwater infiltration is common practice via soakwells (shallow vertical infiltration wells). The data is analyzed using a distributed and dynamic hydrological model to simulate the groundwater response. The model explicitly couples a soakwell model with a groundwater model so that the performance of the soakwells is reduced by the increase of groundwater levels. The groundwater observation data is used to setup, calibrate and validate a coupled MIKE SHE-MIKE URBAN groundwater model and the model is used to quantify the extent of groundwater rise as a result of the urbanization process. The modeled urbanization processes included the irrigation of new established private and public gardens, the reduction of evapotranspiration due to a decrease in green areas, and the development of artificial stormwater infiltration. The study demonstrates that urbanization with stormwater infiltration affects the whole catchment water balance, increasing recharge and decreasing evapotranspiration. These changes lead to a rise in the groundwater table and an increase in the probability of groundwater seepage above terrain.