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山坡几何形状影响流域水流汇聚,土壤厚度则影响径流生成,在水文过程模拟中考虑山坡地貌因素十分必要。基于山坡单元,通过研究水文相似因子山坡Pe’clet数(Pe数)在不同流域空间分布的规律,发现山坡Pe数的累积分布曲线与流域蓄水容量曲线类似,由此确定两者之间的关系式。实例验证表明,利用山坡Pe数推求流域土壤水蓄水容量的方法可行。利用关系式反推新安江模型中的参数B,对比率定参数B的径流模拟结果与推求参数B的径流模拟结果表明,推求参数B的模拟结果整体较好,避免了新安江模型中参数B的率定,进一步验证了该方法的合理可行性。
The geometric shape of hillside affects the convergence of water flow in the drainage basin, while the soil thickness affects the runoff generation. It is necessary to consider the hillside topography in hydrological process simulation. Based on the hillside units, we found that the cumulative distribution curve of Pe numbers is similar to the reservoir water storage capacity curve by studying the Peeclet number (Pe numbers) of hillsides with hydrological similarity factors in different watersheds. Therefore, Relationship. The example verification shows that it is feasible to use the number of hillsides to deduce the soil water storage capacity. Using the relationship between the parameter B in the Xin’anjiang model and the runoff simulation result of the parameter B and the runoff simulation result of the parameter B, it is found that the simulation result of the parameter B is better and the parameter B in Xin’anjiang model is avoided The rate set, to further verify the reasonableness and feasibility of the method.