当地暴雨放大法推求可能最大暴雨的研究与应用

Study and application of deviating possible maximum precipitation with local rainstorm amplification method

当地暴雨放大法是推求可能最大暴雨的重要方法,适用于设计流域有特大暴雨资料的情况。本文以林芝地区为例,分析了林芝地区形成暴雨的环流形势、天气系统、水汽通道,采用水汽放大法、水汽效率放大法、水汽风速联合放大法及水汽输送率放大法对林芝气象站1日可能最大暴雨进行计算,并经综合分析选定计算成果,对计算过程中的注意事项进行了归纳和总结。

Local rainstorm amplification method is an important method to deviate possible maximum precipitation. It is applicable to extraordinary rainstorm information in the designed river basin. Linzhi is adopted as an example in the paper for analyzing circulation feature,weather system and water vapor channel of rainstorm formation in Linzhi. Water vapor amplification method,water vapor efficiency amplification method,water vapor wind velocity joint amplification method and water vapor transmission rate amplification method are adopted for calculating 1 day possible maximum precipitation of Linzhi meteorological station. The calculation results are selected through comprehensive analysis, and the precautions in calculation are summarized and concluded.