Hydrogen and Oxygen s Stable Isotope Compositions Differential Equation Model of Phreatic Water at Several Ideal Conditions
The significance and progress of the meteoric water line and evaporation line was briefly reviewed.Based on the isotope mass conservation principle and Rayleigh fractionation principle,the differential equation models of coupled flow field-stable isotope concentration field in phreatic water system are derived and the relationship between oxygen stable isotope and hydrogen stable isotope in phreatic water system at steady state is discussed.The models of two cases are deduced: ①) for the variation of hydrogen and oxygen stable isotope concentration of unconfined steady flow along the flow direction recharging only by precipitation,the corresponding differential equation is founded and the analytic solution is presented.Then the relationship between hydrogen stable isotope and oxygen stable isotope at the same conditions is deduced; ②) for the variation of hydrogen and oxygen stable isotope concentration of unconfined steady flow along the flow direction when evaporation exists,the corresponding differential equation is founded and the analytic solution is presented.Then the relationship between hydrogen stable isotope and oxygen isotope (Evaporation Line) at the same conditions is deduced.The prsesentation of the models mention above gives a help to interpret more quantitative and more objective the stable isotope data and δ2H-δ18O relation line.
stable isotope composition of hydrogen and oxygen phreatic water steady state differential equation model
Tong Haibin
Institute of Numerical Simulation of Water Resource and Environment, Henan University,Kaifeng, 475004, China
国际会议
The 5th International Yellow River Forum (第五届黄河国际论坛)
郑州
英文
17-23
2012-09-24（万方平台首次上网日期，不代表论文的发表时间）