Hydrological characteristics of Yaohe River

Gaotang Lake extends northward along Wang Lou, Hudian, Li Zui and Mamiao, with a length of about 20 kilometers from north to south. The average width is over 3 kilometers. When going to the kiln in Huainan City, the lake area shrank into a river, and the kiln door controlled the water storage and refused to flow backwards; Under the sluice is the main road of He Yao, which flows northwest to Huaiyuan County and New Town and into Huaihe River. The estuary is called Luokou, with a length of 7.5 kilometers, an altitude of 13.0 meters and a width of more than 30 meters. He Yao, with He Pei as the upper source, enters the Huaihe River through Gaotang Lake and passes through Fengyang, Dingyuan, Changfeng, Huainan, Huaiyuan and other counties and cities, with a total length of 104 km and an average gradient of 0.99 ‰. The drainage area is 1.490 km2, of which the hilly area accounts for 83. 1% and the plain area accounts for 10.8%. When the bottom elevation of Gaotang Lake is 15.0m and the water level is 18.0m, the volume is 1. 1 100 million cubic meters, and the water area is 56 square kilometers. He Yao Luqiao Station1991July 10 has a maximum water level of 23.20m, and the driest river was cut off on August 22nd 1959.