有限长河段中水体稳定同位素运移规律浅析

Continuity Equation of Water Body Stable Isotopes in Finite Length River Reach

为研究河道水体中氢氧稳定同位素组成的微分方程模型具体应用方法,基于水量平衡原理和稳定同位素的质量守恒原理,以一个有限长河段为例,考虑蒸发、降水及河水与地下水的相互作用,推导了有限长河段中水体氢氧稳定同位素组成的连续性方程,给出了河道水体中氢氧稳定同位素组成的微分方程模型在有限长河段上的具体应用。结果表明,该方法降低了该模型的应用门槛,有利于模型的进一步推广。

Based on the principle of water balance and stable isotope mass conservation principle, taking a finite length river reach for an example, continuity equation of hydrogen and oxygen stable isotopes is derived by considering evaporation, precipitation and interaction of river water and groundwater. And it gives the specific application of hydrogen and oxygen stable isotope composition differential equation model of river water. The results show that the method decreases the difficulty of applying the model so that the model can be generalized more easily.