摘要
本文通过分析三峡蓄水工程各个时间节点处,下游地区江水位以及中下游地区地下水位的动态变化特征,进而揭示研究区地下水位对三峡工程蓄水的响应迟滞和影响持续时间。结果表明:三峡大坝阶段性竣工后蓄水工程对中下游地区江水位有一定影响,具体表现为越远离大坝水位变化越小。到研究区位置长江水位受三峡蓄水工程影响水位下降1.3m/期,三峡库区每期蓄水工程造成研究区地下水位下降约0.35m,并且蓄水开始1.5年内水位波动较蓄水开始1.5年后大。研究区地下水位动态对每期三峡大坝蓄水工程的响应时间会持续1.5年。研究结果将对大型水利工程兴建造成中下游地区地下水位变化可能带来的资源开发利用及地质灾害等影响提供参考和指导意义。
In this work,we revealed the influence on response delay and impact duration of the groundwater level after the water storage of the Three Gorges Dam Project(TGD)in downstream area by investigating the dynamic characteristics of Yangtze river water level in the downstream area and the dynamic characteristics of groundwater level in the middlestram in some timelines of TGD’s water storage.The results indicated that river water level of downstream and midlestram were affected by the TGD in different degree.Away from the TGD,the water level changes are more obvious in near region than that in far region.In this study area,due to the impact of the TGD,the water level of the Yangtze river and groundwater level fell by 1.3 m/period and 0.35 m/period,respectively.Particularly,the water level has a bigger change in the first 1.5 year of the TGD’s water storage than that of later.Generally,the dynamic response time of the groundwater level to each phase of TGD will last for 1.5 years.In addition,this study will provide reference and guidance for the resource development and utilization and geological disaster caused by the change of groundwater level in the middle and lower reaches of large water conservancy projects.
出处
《科学技术创新》
2020年第8期143-145,共3页
Scientific and Technological Innovation
基金
国家自然科学基金项目(面上项目,重点项目,重大项目)“长江经济带地质环境综合调查工程”(12120114069301).
