∶ Precipitation is the main source of water resources in the Beijiang River Basin, so studing the changing trend of precipitation is essential to appropriate planning and permanent utilization of water resources. However, the present trend analysis is mainly based on univariate trend test while the multivariate method is rarely applied. Therefore, this paper applied the univariate and multivariate Mann-Kendall trend test method to analyze and obtain the whole trend of the precipitation in the Beijiang River Basin. The input data were extracted from the daily precipitation at 6 representative meteorological stations of the Beijiang River Basin from 1959 to 2009, with the 3 characteristics (the annual precipitation, annual precipitation days and annual peak precipitation) being analyzed specifically. The results indicate that insignificant trend was detected at the stations of Renhua, Shaoguan, Lechang, Lianzhou and Guangning, while significant one detected at Qingyuan station. In the overall trend analysis, multivariate trend test methods can take into account the multiple attributes and characteristics of precipitation, which can better capture the whole precipitation trend of precipitation of the basin.
∶ precipitationmultivariate trend analysisMann-Kendall testBeijiang River Basin
NETL
NSTL
维普
万方数据
