推理公式法在混合地貌汇流计算中的应用

Application of the Reasoning Formula in Mixed Geomorphic Convergence Calculation

目前无资料地区多根据暴雨资料推求设计洪水或采用经验公式法计算设计洪水,这些方法是根据单一下垫面情况分区建立的,对于混合型地貌并不能完全套用。以宜川县某工程为例,结合项目区的下垫面条件,综合考虑水文、气象特征,初步探讨黄土林区与破碎塬区过渡带混合地貌汇流计算中推理公式法的适用性。结果表明汇流计算成果与实际资料较接近,该法的计算成果相对较合理,可为黄土林区与破碎塬区过渡带混合地貌洪水计算提供参考。

At present,there is no data in most regions to infer design floods based on storm data or calculate design floods using empirical formulas.These methods are established based on a single underlying surface and cannot be fully applied to mixed landforms.Taking a project in Yichuan County as an example,combining the underlying surface conditions of the project area,comprehensively considering hydrological and meteorological characteristics,and preliminary exploring the applicability of the inferential formula method in the calculation of mixed geomorphic confluence in the transition zone between the loess forest area and the broken gully area.The results show that the results of the confluence calculation are close to the actual data,and the calculation results of the method are relatively reasonable,which can provide a reference for the calculation of mixed geomorphic floods in the transition zone between the loess forest area and the broken sloping area.