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受西南暖湿气流以及南下冷空气的共同影响,南汀河流域普降暴雨、大暴雨,导致流域干流大文水文站和姑老河水文站发生建站以来的特大洪水(以下简称“6·02”暴雨洪水),重现期均达到50 a一遇,洪水使流域内工农业以及人民生命财产遭受严重损失。分析了此次暴雨成因、时空分布和暴雨特征,并将姑老河站洪水与历年大洪水作比较,结果表明,2001年洪峰流量最大,次洪水历时较长,是导致该流域洪水成灾的主要原因。分析成果可为南汀河流域综合治理、防洪抗洪提供参考。
Affected by the combined effects of warm and humid southwest flow and cold air south, heavy rainfall and torrential rains in the Nanting River basin resulted in serious floods since the establishment of the Davao Hydrographic Station and Gulaohe Hydrometric Station in the mainstream of the basin (hereinafter referred to as “6.02 ”Storm flood), the recurrence period reached 50 a once in a while, floods caused heavy losses to the industrial, agricultural and people’s lives and property in the basin. The causes of the storm, the distribution of time and space and the characteristics of rainstorm are analyzed. The flood of Guoluhe station is compared with the floods over the years. The results show that the flood peak was the largest in 2001 and the flood took a long time, resulting in flood disaster in the basin main reason. The results of the analysis can provide a reference for the comprehensive management of Nanting River Basin and flood control and flood fighting.