[关键词]
[摘要]
在分析区域水文地质条件基础上,构建了地下水流系统数值模拟模型。通过地下水系统均衡分析,提出泉水恢复的主要影响因素为河流渗漏补给和地下水的人工开采。以泉水恢复出流为目标进行了玉泉山泉恢复方案研究。结果表明,现状地下水系统呈负均衡,要实现泉水复涌需要同时采取地下水减采和人工回补措施。分别提出了以2030年和2050年为泉水恢复时间,以及不同人工回灌条件下的泉水恢复方案。若在永定河山峡段增加河道渗漏量0.8×108 m3/a,同时地下水压采至现状的71%,玉泉山泉水有望在2050年恢复出流;若地下水压减至现状的45%,则泉水将在2030年恢复出流。考虑到城市发展建设现状,地下水系统恢复的过程中需考虑恢复的适宜水位。
[Key word]
[Abstract]
Based on the analysis of regional hydrogeological conditions, a numerical simulation model of groundwater isestablished. Through the equilibrium analysis of groundwater system, it is proposed that the main influencing factors of spring water recovery are river leakage recharge and groundwater exploitation. The recovery scheme of Yuquanshan spring by numerical simulation methodwas studied and the results showed that the groundwater system is in negative equilibrium and it is necessary to adopt the measures of reducing groundwater exploitation and manual recharge in order to realize the spring water outflow. The restoration schemes of spring water under different artificial recharge conditions are proposed respectively for spring recovery in 2030 and 2050. If 0.8×108m3/a of river leakage is increased in Yongding River Gorge section, and groundwater exploitation is reduced to 71% of the current situation, Yuquanshan spring is expected to resume outflow in 2050.If the groundwater exploitation is reduced to 45% of the current situation, the spring water will resume flow in 2030. Considering the current situation of urban development, it is necessary to consider the appropriate water level in the process of groundwater system restoration.
[中图分类号]
[基金项目]
北京市科技计划课题(NO.Z141100003614060),北京市优秀人才资助(2015400617931G297),北京市自然科学基金(8172046)资助,北京市百千万人才工程(2020A55)