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以深圳市观澜河支流白花河为研究对象,开展基于综合单位线法的设计洪水推算及参数选取研究.通过比较综合单位线法和推理公式法推算的各断面洪峰流量计算结果,说明综合单位线法的洪水计算成果偏于防洪安全.实例研究表明综合单位线法适合于类似地区的洪水计算.“,”Study of river design flood calculation and parameter selection based on synthetic unit hydrograph is conducted with target at Baihua River,a tributary of the Guanlan River in Shenzhen City,China.Through comparison of the results of peak flow calculation for every cross-section by synthetic unit hydrograph method and rational formula method,it is revealed that the peak flow calculated by synthetic unit hydrograph is safer than that calculated by rational formula for the river flood control.Case study shows that the synthetic unit hydrograph method suits for the flood calculation in similar regions.