ISOTOPIC EXCHANGE OF SOIL WATER IN WATER CYCLE
Environmental isotopes can be effective used for tracing water cycle and addressing water resource problems. Isotopes as natural tracers can be used to trace the transportation process of water in water cycle and the variations of isotopic value can provide information about the transference of soil water. In this paper, the variations of stable isotopes in catchment hydrological process are introduced, the isotope hydrograph separation method is reviewed, and the fundamentals of isotopic behavior in soil water are mainly discussed. An experiment on isotopic exchange between precipitation and soil water in an artificial soil trough is carried out. The results indicate that the oxygen isotopic content of the flow in the outlets changes from about -8.5%o to -6.5%o along with the runoff generation while the isotopic compositions of rain water are unchangeable. Therefore, the isotope exchange degree between soil water and rain water is considerable and the mutual mixing may be an important way for isotopic variations in soil water. This study has great significance to reveal the rules of transformation between precipitation and soil water.
Environmental isotopes water cycle isotopic ezchange soil water isotope hydrograph separation method soil trough ezperiment
Haiying Hu Weimin Bao Tao Wang Simin Qu
State Key Laboratory of Hydrology-Water Resources And Hydraulic Eng., Hohai University, Nanjing,China College of Water Resources and Environment, Hohai University, Nanjing, China
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
188-192
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）