高关水库1972年运行以来蓄满率低,防洪与兴利之间的矛盾突出。本文将高关水库的年最大洪水系列延长至2023年和考虑历史洪水调查资料,开展设计洪水复核计算,并与采用暴雨途径推求的成果进行对比分析。结果显示:由流量途径推求的设计洪水结果比由暴雨途径计算的结果明显偏小,百年一遇设计洪峰、12 h洪量和1 d洪量分别偏小15.92%、27.93%和23.58%,两千年一遇校核洪峰、12 h洪量和1 d洪量分别偏小12.21%、17.52%和13.56%;从安全和管理两方面综合考虑,建议年最大洪峰流量设计值采用暴雨途径计算的结果,而年最大洪量设计值采用流量途径计算的结果;采用同频率放大法推求设计洪水过程线,重新确定水库汛限水位,可提高水库的综合利用效益。The fill storage ratio of the Gaoguan Reservoir is very low since operation in 1972, and the contradiction between flood control and comprehensive utilization is prominent. In this study, extending the annual maximum (AM) flood data series to 2023 and considering the historical flood information, the design floods were rechecked and compared with those estimated by design storm. The result shows that the 100-year design flood (2000-year check flood) peak discharge, 12 h and 1 d flood volume estimated by the flow discharge series are 15.92% (12.21%), 27.93% (17.52%), and 23.58% (13.56%) smaller than those calculated by the rain storm data, respectively;Comprehensively considering the safety and management factors, it is suggested that the design discharge peak and flood volume are selected based on AM rain storm and flood data series, respectively. The same frequency amplify method was used to derive design flood hydrograph, so as to determine the reservoir’s flood limited water level which will improve the comprehensive utilization benefit of the reservoir.
