Analysis of Nonstationary Change of Annual Maximum Level Records in the Yangtze River Estuary

Table 4

Trend and autocorrelation test results for subseries before and after the change-point in 5 stations.

Station	Subseries before change-point						Subseries after change-point
	SRC test		MK test		Autocorrelation test		SRC test		MK test		Autocorrelation test
	Test statistic	Test result	Test statistic	Test result	Autocorrelation coefficients	Test result	Test statistic	Test result	Test statistic	Test result	Autocorrelation coefficients	Test result
Jiangyin	–1.267	0	–1.124	0	–0.093	√	–0.018	0	0.094	0	0.165	√
Tianshenggang	–0.709	0	–0.678	0	–0.192	√	0.899	0	0.882	0	0.176	√
Xuliujing	–0.570	0	–0.571	0	–0.199	√	0.159	0	0.169	0	0.128	√
Wusong	0.438	0	0.482	0	–0.244	√	0.079	0	0.169	0	0.036	√
Waigaoqiao	0.218	0	0.375	0	–0.229	√	0.243	0	0.300	0	0.017	√

“0” indicates “no trend”, “1” indicates “upward trend”, “−1” indicates “downward trend”, and “√” indicates “independence”.