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

Table 1

Detailed information of the three segments of the CW.

Segment	Segment I (400 m)	Segment II (400 m)	Segment III (400 m)
Types of plants	Phragmites communis; Typha angustifolia; Iris tectorum Maxim	Phragmites communis; Typha angustifolia	Phragmites communis
Dominant plant	Phragmites communis	Phragmites communis	Phragmites communis
Plant density	30–35/m^2	30–35/m^2	30–35/m^2