Poyang lake water level change trend in nearly 60 years

Represented by the Xingzi Station, it was studied that the Poyang Lake water level change trend in nearly 60 years. The improved MK test and homogeneity test are used to detect trend and change points in the series of maximum and minimum water levels. Furthermore, the relationship among extreme water levels, precipitation and human activities are discussed. Some meaningful results are obtained as follows. There are an abrupt change late 1960s and early 2000s about all of the low water level (LWL) and high water level (HWL). This is consistent with the regional precipitation changing trend and human activities. LWL and HWL rose significantly in 19952003 and 1982-2002 respectively. The region rainfall has a clear upward trend in the 80's and 90's. Many hydraulic projects play a role such as the Three Gorges Dam after 2000s. Those levels were consistent with the regional precipitation changing trend and human activities.