Analysis of the Meteorological and Hydrological Change of Argun River Basin in Recent 50 Years
Hie change tendency of hydrological and meteorological factors at 20 stations and the multiple time scale characters of rainfall and runoff at some typical stations were analyzed respectively based on TFPW-MK( Mann-Kendall test with trend -free pre-whitening )and wavelet analysis. Additionally, the jumping point of runoff time series was calculated by cluster analysis. Hie results show that the local temperature is rising apparently especially in the Hailar station possibly due to urbanization. The annual precipitation has no significant variance tendency but the monthly precipitation series indicate the obvious tendency of increase or decrease, including increased significantly in November/December and January and decreased significantly in July and August. These stations are mainly distributed in Hulun valley and Hailar valley. The annual runoff has a decreasing tendency especially in April and May. The wavelet analysis shows that the precipitation has a primary period of 25a and runoff of 20~26a. The jumping point of runoff time series is the year of 1999, which could test the conclusion about mutation through wavelet analysis.
Mann-Kendalltrend analysiswavelet analysismulti-time scaleshydrological and meteorological factorsArgun River
NETL
NSTL
万方数据
维普
