• 水文水资源 •

### 白洋淀流域地下水更新速率

1. 1. 山西大学环境与资源学院,太原 030006
2. 湖南省地质矿产勘查开发局四零二队,长沙 410014
3. 江西师范大学鄱阳湖湿地与流域研究教育部重点实验室,南昌 330022
4. 中国科学院遗传所农业资源研究中心,石家庄 050021
5. 中国科学院地理科学与资源研究所,北京 100101
• 收稿日期:2014-08-01 修回日期:2014-12-01 出版日期:2015-03-25 发布日期:2015-03-25
• 作者简介:

作者简介：袁瑞强(1980-),男,山西太原人,副教授,博士,主要从事流域水循环与水环境研究,E-mail: rqyuan@sxu.edu.cn

• 基金资助:
国家自然科学基金项目(41301033);国家重点基础(973计划)项目(2010CB428805)

### Renewal rate of groundwater in the Baiyangdian Lake Basin

Ruiqiang YUAN1, Xiting LONG2, Peng WANG3, Shiqin WANG4, Xianfang SONG5

1. 1. School of Environment and Resource, Shanxi University, Taiyuan 030006, China
2. The 402 Team, the Bureau of Geology and Mineral Resources Exploration of Hunan, Changsha 410014, China
3. Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
4. Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, CAS, Shijiazhuang 050021, China
5. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
• Received:2014-08-01 Revised:2014-12-01 Online:2015-03-25 Published:2015-03-25

Abstract:

Human activities, such as water storage in reservoirs and pumping for irrigation, reduce stream flows and deplete unconfined aquifer in the plain area of the Baiyangdian Lake Basin. Without recharges from rivers and groundwater, the Baiyangdian Lake faces the risk of drying up. Considering the impacts of the Baiyangdian Lake on the local environment, biodiversity, and climate, many projects of water transfer for the sustainability of the lake were implemented. However, the result are unsatisfactory due to considerable leakages in the lake. In order to preserve the lake, sustainable groundwater use should be achieved and therefore, it is necessary to study the renewal rate of unconfined groundwater. In this study groundwater was surveyed on the plain area of the Baiyangdian Lake Basin in 2009. thirty six samples from groundwater and surface water were collected for measuring the content of tritium. Tritium content in precipitation since the mid-1950s was rebuilt by comparing the results from linear interpolation, Wu's method and Lian's method. Renewal rate of groundwater in the plain area was estimated based on the tritium data and the well-mixed model. Results show that leakage of the lake slightly increased tritium content in the ambient groundwater. Generally, the renewal rate of unconfined groundwater decreased from 15.0 %/a to 4.0 %/a between the mountain area and the lake. Alluvial fans are the main recharge area with an average renewal rate of 9.8 %/a. The renewal rate dropped to 4.4 %/a in the alluvial plain. We recommend that groundwater development should be restricted in the alluvial plain to recover the renewal rate of unconfined groundwater. Although such recovery may take a long time to occur, it is believed that recharging the lake by shallow groundwater is the only way to maintain a sustainable lake.