论文部分内容阅读
195 8年 7月与 1982年 8月黄河下游分别发生了 1949年以来的第一和第二大洪水 ,两场洪水是下游防洪最重要的参照洪水。然而 ,这两场洪水的暴雨洪水关系却存在明显差别。在对三花间水库工程大规模调研的基础上 ,分析了中小型水库的防洪作用 ;并采用降雨径流关系法与新安江模型分别定量估算了前期影响雨量和暴雨时空分布对两场洪水的影响。从对大型水库工程、夹滩滞洪区以及暴雨时空分布、前期影响雨量、中小型水库等因素分析来看 ,暴雨时空分布的影响是主要的 ,中小型水库的影响并不显著
195 The first and second largest floods since 1949 occurred in July 2008 and August 1982 in the lower reaches of the Yellow River, respectively. The two floods are the most important reference floods for downstream flood control. However, the storm-flood relationship between the two floods is obviously different. On the basis of large-scale investigation of the Sanhuajian reservoir project, the flood control effect of the small and medium-sized reservoirs was analyzed. The relationship between the rainfall and the rainfall distribution over the two floods was quantitatively estimated by the rainfall-runoff relation method and the Xin’anjiang model . From the analysis of large-scale reservoirs, stagnant flood zones and the spatial and temporal distribution of rainstorms, early-stage impact rainfall, small and medium-sized reservoirs and other factors, the impact of the spatiotemporal distribution of rainstorms is dominant. The impact of small- and medium-sized reservoirs is not significant