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云南省楚雄州水资源四级分区暴雨洪水特性分析
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Abstract:
根据流域自然地理和水文、雨量站的分布情况，结合各站实测水文资料，分析全州水资源四级分区内暴雨、洪水特性。结果表明州内暴雨具有单点突出、暴雨时段主要集中在1日等特征；洪水特征基本由暴雨特性决定，洪水过程特点为陡涨陡落。洪峰流量的Cv值变化在0.37~0.90之间，1~7日洪量的Cv值变化在0.26~0.94之间；洪量的Cv值比洪峰的Cv值变化稍大，且随着时段的增长洪量Cv值有增大的趋势；区域洪峰流量与洪量关系较好，线性均呈上凹型等。研究对楚雄州内无资料地区和小型水利水电工程水文分析计算具有一定的参考价值和指导作用。
The characteristics of rainstorm and flood in the four-level water resources division of Chuxiong Prefecture were analyzed based on the physical geography of the basin and the distribution of hydrology and rainfall gauged stations. The results show that the rainstorm has the characteristics of single point outburst, and the rainstorm period mainly concentrates on 1 day. The flood characteristics are basically determined by rainstorm characteristics, and the flood process is characterized by steep rise and fall. The Cv values of peak discharge and 1~7 d flood volume are varied from 0.37 to 0.90, and 0.26 to 0.94, respectively. The Cv values of flood volume are changed slightly more than that of peak flow, and tended to increase with the increase of time period. The relationship between peak discharge and flood volume is good with linearity concave. The study has certain reference value and guiding function for hydrologic analysis and calculation of small water conservancy and hydropower projects in Chuxiong Prefecture without data.
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