Impact and suggestions for the inland river water environment in Pudong New Area under the extreme drought of the Yangtze River and salt tide intrusion in 2022
Due to the severe drought in the Yangtze River Basin in 2022,the water environment security of Pudong New Area suffered tremendous pressure.To ensure the safety of the urban water environment,the inland rivers in Yangtze River Estuary-Huangpu River-Pudong New Area were investigated to evaluate the spatiotemporal distribution characteristics and factors of chloride with salt tide intrusion under the influence of extreme drought.The effects of water diversion from the Yangtze River and Huangpu River on the inland river water environment in Pudong New Area after the onset of salt tide intrusion were analyzed.The results showed that due to the extreme drought in the Yangtze River Basin,the water level of the Yangtze River Estuary dropped compared with previous years,the salt tide intrusion time in 2022 was shifted to August,the intrusion frequency increased,and the total intrusion duration reached as high as 142 days.Through the diversion and drainage measures of"diverting water from the west and drainage to the east",the water from the Yangtze River and the Huangpu River could be used to cope with the salt tide intrusion.When the salt tide intrusion became severe and water diversion from the Yangtze River was resisted,the water diversion changed from the Huangpu River to replenish the water source of the inland river.The water diversion helped to reduce the risk of salt tide intrusion and improve the water quality of the inland river.Therefore,to cope with the extreme drought and reduce the impact of salt tide intrusion on the inland river water environment,the water diversion and drainage measures from the Yangtze River and Huangpu River should be optimized.At the same time,it was recommended to strengthen the ecological restoration of the inland river,reduce the dependence on water diversion through ecological expansion,and strengthen the self-purification capacity of the inland river.
severe droughtsalt tidewater environmentwater diversion and drainage
万方数据
维普
