Abstract

Artificial recharge is an effective way to alleviate water shortages and excessive groundwater exploitation. In this study, to explore environmental changes of surface water and groundwater during multi-water-sources recharge process, numerical simulation method was applied. Local reclaimed water, treated by wetland, and water from the South-to-North Water Transfer Project (SNWTP) were used to recharge groundwater reservoir in Mi-Huai-Shun District (Miyun District, Huairou District and Shunyi District). The Flow Model results showed that the accumulated loss of the groundwater resource in the Mi-Huai-Shun area from 2007 to 2016 reached – 1.784 × 10⁹ m³. All the water sources contribute to the recharge of groundwater, raising the groundwater level and increasing the groundwater reserves. Meanwhile, the Solute Transport Model results show that different water source has different effects on the local groundwater environment. chloride concentration of reclaimed water source and wetland water source are higher than groundwater, and the artificial recharge caused the chloride concentration of groundwater in receiving area to rise. The water from the SNWTP played an important role on reducing chloride concentration due to dilution. In addition, Multi-Water-Source artificial recharge is also related to the local hydrogeological conditions. This study provides a comprehensive analysis of the impact of multi-water-source recharge on groundwater quantity and quality.

中文翻译：

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含水层多水源人工补给的数值模拟-以密会顺地下水库为例

摘要

人工补给是缓解缺水和过度开采地下水的有效方法。为了研究多水源补给过程中地表水和地下水的环境变化，采用了数值模拟方法。经过湿地处理的当地再生水和南水北调工程（SNWTP）的水被用于为密怀顺区（密云区，怀柔区和顺义区）补给地下水。流动模型结果表明，密会顺地区2007年至2016年的地下水资源累计损失达到– 1.784×10 ⁹ m ³。所有的水源都有助于地下水的补给，提高地下水位和增加地下水储量。同时，溶质运移模型结果表明，不同的水源对当地的地下水环境有不同的影响。再生水和湿地水的氯离子浓度均高于地下水，人工补给导致接收区地下水的氯离子浓度上升。SNWTP产生的水在降低由于稀释而导致的氯化物浓度方面发挥了重要作用。此外，多水源人工补给还与当地的水文地质条件有关。这项研究提供了对多水源补给对地下水数量和质量的影响的综合分析。