扬州城市规划区地下水应急供水方案可行性研究
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引用本文:朱明君,党磊,谢月清,李明月.2024.扬州城市规划区地下水应急供水方案可行性研究[J].地球学报,45(3):423-432.
DOI:10.3975/cagsb.2024.031501
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作者单位E-mail
朱明君 江苏省地质调查研究院
自然资源部地裂缝地质灾害重点实验室 
1055565003@qq.com 
党磊 南京大学地球科学与工程学院, 表生地球化学教育部重点实验室  
谢月清 南京大学地球科学与工程学院, 表生地球化学教育部重点实验室  
李明月 南京大学地球科学与工程学院, 表生地球化学教育部重点实验室  
基金项目:江苏省地勘基金项目(编号: 苏财资环[2019]14号)
中文摘要:突发事件会引起大范围的地表水污染, 对城市供水水源的安全形成挑战, 严重威胁人民生命安全, 危害生态环境和经济社会稳定。地下水与地表环境联系较弱, 利用地下水作为应急水源是最安全的水资源保障措施。本研究以扬州城市规划区为例, 确定了规划区应急需水量为17.2万m3/d, 应急时长为15 d, 主要开采的第Ⅱ、Ⅲ承压含水层限采红线水位埋深分别为20 m、30 m, 根据研究区应急供水需求制定了4种应急供水方案。方案1和2为水源地集中供水, 方案3为分散式供水, 方案4为分散与集中式联合供水。依据工作区水文地质条件和地下水位监测数据, 基于HydroGeoSphere构建并校正了研究区三维地下水-地表水耦合数值模型, 利用数值模型分析了不同供水方案应急抽水引起的地下水位降落趋势及其与地下水开采红线的关系。研究表明, 分散与集中式联合供水方案可以明显减小工作区内的水位波动, 减缓水源地的供水压力, 降低地面沉降风险, 对现有管网的利用也较为充分, 可作为应急供水的首选方案。
中文关键词:地下水  水位红线  应急供水  数值模拟  HydroGeoSphere  扬州
 
Suitability Assessment of Groundwater Emergency Supply Plans in Yangzhou City
Abstract:Emergencies cause large-scale surface water pollution, challenge the safety of urban water supply sources, seriously threaten people’s safety, and endanger the ecological environment, economic, and social stability. The connection between groundwater and land surface is weak; therefore, using groundwater as an emergency water source is the safest water resource measure. In this research, the Yangzhou urban planning area was selected as the study area. We determined that the volumetric water required during an emergency is 172 000 m3/d, and the emergency period is 15 days. Additionally, the alert depths of the water level in the second and third confined aquifers are 20 m and 30 m, respectively. Four emergency water supply schemes were used according to the emergency water supply plan. Schemes 1 and 2 depict centralized water supplies, Scheme 3 shows a distributed water supply, and Scheme 4 presents a combination of distributed and centralized water supplies. Based on the hydrogeological conditions and observation results of the study area, a three-dimensional coupled groundwater and surface water numerical model was constructed and calibrated using Hydrogeosphere software. Water table variations caused by emergency pumping of different water supply schemes and their relationship with compliant drawdowns were analyzed. The results show that the hybrid water supply scheme can significantly reduce the variation in water level in the study area, slow down the water supply pressure of the water source, and reduce the risk of ground subsidence. Moreover, it makes full use of existing pipe networks. Therefore, a hybrid water supply scheme is recommended as the first choice for emergency water supplies.
keywords:groundwater  alert depth of water level  emergency water supply  numerical simulation  HydroGeoSphere  Yangzhou
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