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在考虑了降雨和地形特性基础上开发研究了适用于干旱半干旱地区的中小尺度分布式水文模型(THIHMS-SW),依据黄土高原水土保持措施的建设原则,将土壤表层离散为不等厚的数层进行饱和非饱和土壤水分运动数值计算。采用所建模型,对相对天然状态下的岔巴沟流域进行了连续3a的模拟计算。除个别洪峰及较小流域外,得出的模拟计算效果在整个流域范围内均较好,相关系数达到0.84,Nash效率系数达到0.70,峰现时间及最大洪峰流量都得到较好再现。结果表明,模型在黄土高原地区具有较好的适用性。
Based on the characteristics of rainfall and topography, a small and medium scale distributed hydrological model (THIHMS-SW) suitable for arid and semi-arid regions was developed and studied. According to the construction principles of soil and water conservation measures in the Loess Plateau, Numerical calculation of saturated and unsaturated soil moisture movement in several layers. Using the model, the simulation of continuous 3a in the relatively natural state of Chabagou basin was carried out. In addition to individual flood peak and small watershed, the simulation results obtained in the watershed are better, the correlation coefficient of 0.84, Nash efficiency coefficient of 0.70, the peak time and maximum peak flow are better reproduced. The results show that the model has good applicability in the Loess Plateau.