基于氡同位素的河水与地下水水力交换研究  

Study on hydraulic exchange of river water and groundwater based on radon isotope

作　　者：余钟波 李敏娟[1,2,3] 刘芸辰 李根[4] 衣鹏 YU Zhongbo;LI Minjuan;LIU Yunchen;LI Gen;YI Peng(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China;Joint International Research Laboratory of Global Change and Water Cycle,Nanjing 210098,China;College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Hailing Branch of Taizhou Water Resources Bureau,Taizhou 225300,China)

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学全球变化与水循环国际合作联合实验室,江苏南京210098 [3]河海大学水文水资源学院,江苏南京210098 [4]泰州市水利局海陵分局,江苏泰州225300

出　　处：《河海大学学报（自然科学版）》2020年第1期8-13,共6页Journal of Hohai University(Natural Sciences)

基　　金：国家重点研发计划(2016YFC0402710);国家自然科学基金(51539003,41761134090)。

摘　　要：选取氡同位素(222 Rn)作为地表水与地下水水力交换过程的天然示踪剂,探明不同河段多水源水力关联关系及海陵区水循环特征。对新通扬运河海陵段进行河水及附近地下水采样,定性分析河水与地下水水力联系过程,建立河道氡一维稳定流模型及流量平衡模型,定量辨识地下水入流和河水渗漏机制。结果表明,新通扬运河海陵段的地下水补给主要发生在R3~R4、R7~R9河段,支流汇入、汇出对干流影响较小。模拟的地下水入流和河水渗漏结果显示河道中存在河水和地下水相互作用。利用河道氡一维稳定流模型得到详细的河水与地下水的水力联系情况,所得结果与定性分析结果一致。河道氡一维稳定流模型中,上下游流量为特别敏感参数,上下游河水内氡活度浓度为比较敏感参数。This work selected 222 Rn as a natural tracer to study the hydraulic exchange processes between the river water and the groundwater in Hailing section,Taizhou City.Samples of river water were collected from the Xintongyang Canal and samples of groundwater containing 222 Rn were collected from the study area.The hydraulic relationship between river and groundwater was analyzed quantitatively.Based on a 1-D steady state model and a flow balance model,the groundwater inflow and the river water leakage were calculated separately.The 222 Rn tracer results show that the groundwater inflow mainly occurred during two sections of the Xintongyang Canal,R3~R4 and R7~R9,and the tributaries had little effect on the 222 Rn activity of river reach.Besides,there is an interaction between river and groundwater along the river.Furthermore,the results of the 222 Rn method are consistent with the results in qualitative analysis.The upstream flow and downstream flow are the most sensitive parameters of the 1-D steady state model,while the 222 Rn activity of river is a relatively sensitive parameter.

关 键 词：氡同位素 河道氡一维稳定流模型 地下水 河水 水力交换 新通扬运河海陵段 

分 类 号：TV214[水利工程—水文学及水资源]