In general, the Jianghuai watershed area lacks water resources. Its surface water mainly comes from atmospheric precipitation. The annual precipitation in most areas in the region is 850-1000mm, including the central and western Dingyuan, the southwest Fengyang, and the eastern Changfeng. The northeastern area of ????and Fei is the area with the least rainfall, with an annual precipitation of less than 900IYIITI. The precipitation outside the area is insufficient, the soil moisture storage is small, and the groundwater resources are poor and difficult to use. The annual average groundwater resources in the east are less than 50,000 In/km and in the west are less than 100,000/kni. The groundwater depth is generally 2 to 8m, and some areas Above 10m, the water inflow from a single well is generally less than 100m/d, and the water inflow from a single well in the Mingguang area is less than 10111/d.