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分析了１９８０～１９８６年４～９月西江流域洪水过程的大气水汽汇特征及其与西江高要站水流量的关系。结果表明，洪水过程的前期大气一般连续存在较强水汽汇，时间为７～１０多ｄ，洪水的发生是各子流域强水汽汇连续产生的径流的积累所致；用水汽汇能较好地估算和预报高要站洪水期的水流量，为洪水的预报提供一条新思路．
The atmospheric water vapor characteristics during the flood season in the Xijiang River Basin from April to September from 1980 to 1986 and the relationship between them and the water flow in Gaoyao Station of the Xijiang River were analyzed. The results show that in the early stage of the flood process, there is a continuous continuous existence of strong water vapor in the atmosphere over a period of 7 ~ 10 d. The flood is caused by the continuous runoff accumulation of strong water vapor in each sub-catchment. Estimating and forecasting the water flow during the flood period of Gaoyao station will provide a new idea for flood forecasting.