Characterizing the interaction of groundwater and surface water in the karst aquifer of Fangshan,Beijing (China) |
| |
| Authors: | Haibo Chu Jiahua Wei Rong Wang Baodong Xin |
| |
| Institution: | 1.State Key Laboratory of Hydroscience & Engineering,Tsinghua University,Beijing,China;2.State Key Laboratory of Plateau Ecology and Agriculture, Sanjiangyuan Collaborative Innovation Center,Qinghai University,Xining,China;3.Beijing Institute of Hydrogeology and Engineering Geology,Beijing,China |
| |
| Abstract: | Correct understanding of groundwater/surface-water (GW–SW) interaction in karst systems is of greatest importance for managing the water resources. A typical karst region, Fangshan in northern China, was selected as a case study. Groundwater levels and hydrochemistry analyses, together with isotope data based on hydrogeological field investigations, were used to assess the GW–SW interaction. Chemistry data reveal that water type and the concentration of cations in the groundwater are consistent with those of the surface water. Stable isotope ratios of all samples are close to the local meteoric water line, and the 3H concentrations of surface water and groundwater samples are close to that of rainfall, so isotopes also confirm that karst groundwater is recharged by rainfall. Cross-correlation analysis reveals that rainfall leads to a rise in groundwater level with a lag time of 2 months and groundwater exploitation leads to a fall within 1 month. Spectral analysis also reveals that groundwater level, groundwater exploitation and rainfall have significantly similar response periods, indicating their possible inter-relationship. Furthermore, a multiple nonlinear regression model indicates that groundwater level can be negatively correlated with groundwater exploitation, and positively correlated with rainfall. The overall results revealed that groundwater level has a close correlation with groundwater exploitation and rainfall, and they are indicative of a close hydraulic connection and interaction between surface water and groundwater in this karst system. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
