Effects of Water Replenishment From Yellow River On Water Quality of Hengshui Lake Wetland - Effects of Water Replenishment From Yellow River On Water Quality of Hengshui Lake Wetland - Open Access Pub

Hengshui Lake Wetland is the only national wetland and bird nature reserve in the North China Plain. It plays an important role in maintaining the species diversity and ecological balance. In recent years, due to industrial and agricultural production, infrastructure and ecological environment construction and other reasons, the infiltration, runoff, evapotranspiration and other water balance elements was changed, which reduced runoff into the lake. In order to ease the tense water resources situation in the region, Hengshui Lake is replenished each year by Yellow River water. Although Diversion Yellow River Wetland has made direct water supply protection, but also affected the ecology and environment of Hengshui Lake wetlands. In order to understand how artificial water diversion can affect the ecological environment of natural lakes, this paper analyzes the effects of artificial water storage on the water quality of the lake by using the measured data of water samples in the lake. The results showed that the water level of Hengshui Lake showed an upward trend after the diversion from the Yellow River. Comprehensive pollution index showed a downward trend, but Hengshui Lake wetlands are still slightly polluted. Diversion of Yellow River diversion into the lake of the ecological health of Hengshui also caused some impact. DOI10.14302/issn.2637-6075.jpae-18-1937 Wetland is one of the most widely distributed and productive natural ecological environment types in the world4. Wetland has conserved water source, purify water quality, control flood, regulating climate, control soil erosion and reduce environmental pollution. It can also provide a wide range of products to humans and leisure places, has great economic value and social value. Healthy wetland ecosystem is an important part of ecological security and an important foundation for sustainable economic and social development. Over the past 150 years, due to changes in the natural environment and the impact of human activities, more than 50% of the world's wetlands have been degraded or lost 1. About 26 percent of wetlands are used for agricultural production 3 . In the UK, about 23 percent of estuarine wetlands and 40 percent of meadow wetlands are destroyed. In southern Africa, 58 percent of natural wetlands in the Mfolozi valley and 90 percent of wetlands in the Tugela basin have disappeared 6. In southeast Asia, most wetlands have been reclaimed for residential and agricultural land. 78 percent of natural swamp wetlands in Sanjiang plain, China's largest freshwater swamp wetland, are gradually