Advantages and disadvantages of Dongfeng Xisha Reservoir

1. After the Dongfeng Xisha Reservoir was flooded, the city fully realized intensive water supply.

2. Fully switch and transport raw water from Dongfeng Xisha Reservoir.

3. The water intake of the reservoir has two water pipes with a diameter of 3.2 meters, which extend into the depth of the river outside the reservoir like probes to take water, with a total length of 450 meters, so as to ensure the good water of the Yangtze River with stable water quality. Disadvantages of Dongfeng Xisha Reservoir:

4. The construction of the reservoir may induce earthquakes and increase the earthquake frequency in the reservoir area and nearby areas.

5. Due to the interception of the dam and the influence of backwater in the reservoir tail area due to the change of water potential, sediment will inevitably accumulate in the reservoir, especially in the dam and reservoir tail (affected by backwater).

6. Continuous irrigation makes the groundwater level rise and brings the salt in deep soil to the surface. The high content of salt and various chemical residues in irrigation water leads to soil salinization. Dongfeng Xisha Reservoir is located on the north side of the upper section of the south branch of the Yangtze River estuary in Shanghai and in the southwest of Chongming Island. Dongfeng Xisha Reservoir Project is a new type of urban water supply project. The main contents include reservoir dikes, water intake and delivery pumping stations, management areas, culverts, etc.