北京温榆河公园水位变化对生物多样性的影响分析

Analysis of the Impact of Water Level Changes in Beijing Wenyuhe Park on Biodiversity

温榆河公园是北京市重要的生态廊道和蓄滞洪区,公园内水体的水位变化直接影响温榆河公园功能的发挥。为研究最大可能保持生物多样性所需水位,2022年5月开展了温榆河公园内清河及沈家闸至辛堡闸段的蓄水试验,控制辛堡闸前水位为22.5~25.0m,分析水位变化情况下公园内水生植物、浮游生物、底栖动物、鱼类、鸟类等生物多样性的变化。研究认为,非汛期维持辛堡闸前水位在23.5m时,能最大可能保持生物多样性,建议对秋冬非汛期的最佳控制水位进行试验,为温榆河公园水位调度提供借鉴。

Wenyuhe Park,as an important ecological corridor and flood storage area in Beijing,experiences direct impacts on its functionality due to water level changes within the park.In order to study the water levels required to maximize biodiversity conservation,a water storage test was conducted in May 2022,spanning from Qinghe to Shenjia Locks to Xinbao Locks.The water level upstream of Xinbao Lock was controlled within the range of 22.5 to 25.0 meters.The analysis focused on the changes in biodiversity,including aquatic plants,plankton,benthic organisms,fish,and birds,under varying water level conditions.The study suggests that maintaining the water level upstream of Xinbao Lock at 23.5 meters during the non-flood season can best maximize biodiversity conservation.Additionally,it recommends experimenting with optimal control water levels during the autumn and winter non-flood periods to provide insights for water level management in Wenyuhe Park.