How Long, Narrowly Constructed Wetlands Purify Irrigation Return Water: A Case Study of Ulansuhai Lake, China

Table 3

Correlation analysis among five environmental indicators.

	TN	TP	FV	SS	CW length
TN	1	.970^∗∗	.953^∗∗	.954^∗∗	−.956^∗∗
TP	.970^∗∗	1	.983^∗∗	.988^∗∗	−.972^∗∗
FV	.953^∗∗	.983^∗∗	1	.987^∗∗	−.975^∗∗
SS	.954^∗∗	.988^∗∗	.987^∗∗	1	−.989^∗∗
CW length	−.956^∗∗	−.972^∗∗	−.975^∗∗	−.989^∗∗	1

^∗∗With a significance level of 0.01.