Water Resources and Power

The water area and the health status of water quality environment play an important role in wetland park for maintaining the stability of local habitat system. The remote sensing satellite image interpretation and CAD modeling method were used to analyze the water area and water storage of Jinta Beihaizi National Wetland Park. The results show that the water area shows an increasing trend from 2010 to 2018, especially reaching the maximum of 20.7 km² and 30.7 km² in 2013 and 2018, respectively. The inter-annual variation showed different patterns, and the wetland water areas in the shrinking period from 2010 to 2011 were 11.4 km² and 9.9 km², respectively. From 2011 to 2013, the water area increased by about 108.5%, and the increase in 2017 was larger than that in 2016, about 103.5%. The water volume of Beihaizi wetland showed an increasing trend. Wetland water storage had increased in recent years. In 2017 and 2018, water storage exceeded 10 000 m³, and the maximum was 12 555.1 m³. The monitoring of various water quality indicators showed that they were in line with the national surface water environmental quality standards, and there were no pollution indicators and pollution sources. Therefore, Jinta Beihaizi National Wetland Park has reached an important level of wetland protection.