Preliminary analysis of the wetland hydrology and water quality of the lower reaches of the Chanhe River in Xi'an

Aim To study the present ecological state and the characteristics of hydrology and water quality of the wetland in the Chanhe River,Xi'an,China catchment and provide the basic data and actual experience for wetland restoration and reconstruction of northwest China.Methods Using the data from field surveillance and water quality monitoring,analyse the characteristics of hydrology and water quality of the wetland.Results The results show that the hydrology of the wetland is affected by the runoff of the Chanhe River and the water supply needs artificial regulation.The wetland surface outflow was 6×106 m3/y and the water level appeared periodic fluctuation under the influence of influent flow.Water quality monitoring data shows a decline of nitrogen,phosphors and organic pollution.Conclusion The restoration project of rebuilding laky wetland with water source of the Chanhe River is feasible and the wetland is reconstructed by restoring surface flows and it has vital significance in improving the environment and wetland restoration in the northwest China.