一个改进的随机动力学水平衡模型及其应用研究Ⅰ.模型

本文在Eagleson随机动力学水平衡模型的基础上 ,改进了原模型中蒸腾、蒸发量等项的计算方法 ;并根据黄土区降水分布特点 ,将全年分为 1 6个时间长度不等的降水时段 ,分别统计降水特征参数 ,利用质量守衡定律和逐步校正演算法 ,可计算出水文生态系统平衡体系水均衡要素的定量分配和活动层土壤含水量的年动态变化 ,代表了原模型中确定土壤含水量的简单统计法 ,从而可提高模型计算精度和实用性 .改进后的随机动力学水平衡模型更适用地黄土高原的特定水文生态系统

A new equation for calculating the transpiration and evaporation by means of Eagleson stochastic dynamic water balance model is presented in this paper. In the model, the influence of limited water supply to the plant is considered and the raining season within a year is divided into 16 periods, according to the characteristics of the rainfall in loess region. The mass conservation equation and a prediction correction algorithm by means of step by step are applied to calculate the partitioning of the wate...