Based on the daily rainfall data of the Meteorological Bureau of Banma County,Qinghai Province from 1968 to 2018,M-K test and linear estimation method were used to analyze the evolution law of different orders of rainfall and the number of rainfall days in Banma area,Qinghai Province.The results show that:The number of light rain days decreased slowly,while the number of moderate rain days and heavy rain days increased slowly in Banma area from 1968 to 2018.The overall change of rainfall showed a slow rising trend,and the rainfall of different orders showed a slow rising trend,indicating that the precipitation increased slowly with time,and the rainfall intensity also increased slowly,and the risk of secondary disasters such as flooding and debris flow caused by precipitation increased.The analysis results have important practical significance for understanding the temporal variation characteristics of different rainfall levels,disaster prevention,water conservation and biodiversity conservation in Hengduan Mountain area.
Different rainfall levelsRainfall daysVariation characteristicsBanma area
NETL
NSTL
维普
万方数据
