R/S ANALYSIS ON FLOOD TIME SEQUENCES IN WUJIANG RIVER

According to the result of characteristic of peak flow,this paper proved that the peak flow has the random and fractal characteristics.The index of Hurst displayed the obvious trend of the series of flood in Wujiang river.And the flood has characteristics of durability and long-term memory.V value shows that the ascend trend of peak flow will disappear after six years.Durabilities of 53 floods are obviously increase on Wujiang river.The results show that,the change of flood time sequence was influenced by human activities,typhoon and drastically changed climate.