Author(s): Lei Ding, Xiang-Yu Gao, Xi-Ping Dou, Jian Jiao, Xiang Li
Linked Author(s): Xiangyu Gao
Keywords: Qingcaosha Reservoir, The Yangtze Estuary, salinity intrusion, water source safety.
Abstract: The Yangtze Estuary has abundant water with strong self-purification ability. It is an ideal water source for Shanghai, a megalopolis along the coast of the Yangtze Estuary. Qingcaosha Reservoir is the world's largest reservoir of avoiding saltwater and storing freshwater and its water supply scale is about 50 % of the total water supply in Shanghai. The salinity intrusion in the dry season is a potential threat to the safety of Qingcaosha water source. In this paper, a two-dimensional mathematical model of the tidal current and salinity transport in the Yangtze Estuary is established to study the distribution characteristics of freshwater in the Yangtze Estuary in the dry season and the safety of Qingcaosha water source under the impact of salinity intrusion. In January when salinity intrusion is the most severe in the Yangtze Estuary, the area of freshwater resources is the smallest and the salinity at the water intake of Qingcaosha Reservoir is the highest of the year. However, as the reservoir has a large capacity and under normal circumstances, the intake salinity is only about 2 times higher than the standard value, brackish water drawing can also alleviate the water supply crisis to a certain extent in an emergency. The construction and operation of Qingcaosha water source can provide reference for the construction of other island water sources
Year: 2017