暴雨临界曲线法在黑龙江省典型流域山洪预警中的应用

Application of Storm Critical Curve Method in Typical Watershed Flash Flood Early Warning of Heilongjiang Province

为了能够准确地进行山洪预警预报,选取烟筒山水文站所在流域为典型流域,以河道安全泄量为出发点,根据相关的经验公式计算得到最大临界雨量和最小临界雨量,判别出山洪情况,并采用暴雨临界曲线法分析计算了烟筒山水文站的三次典型暴雨过程。结果表明,采用暴雨临界曲线法能定性判别出山洪灾害发生的危害程度,其结果与实际调查情况一致,可见该方法应用于黑龙江省典型流域合理、可靠。

In order to accurately forecasting Flash flood warning,selecting river in Yantongshan hydrological station as the typical basin,taking river safety discharge as starting point,empirical formula were used to calculate the maximum and minimum critical rainfall,and the situation of flash flood was distinguished.Then the storm critical curve method was adopted to analyze three typical rainfall processes in Yantongshan station.Results show that the storm critical curves can discriminate the harm in torrential flood damage qualitatively,and it is consistent with the actual situation.Thus,application of the method in the typical basin of Heilongjiang Province is reasonable and reliable.