reservoir center.

Because Dongyan Reservoir is a conical inner wall, the four sides are high and the middle is low, so the deepest position is at the center.

Dongyan Reservoir in Chaoyang was built in 196s and 197s. After long-term operation, there are some safety hazards, such as loose earth dam, stone falling off spillway, and the gates can't be opened and closed normally. Therefore, Chaoyang District decided to reinforce these 23 small reservoirs, which is conducive to eliminating engineering safety hazards, giving full play to the functions and benefits of reservoirs and promoting the sustainable development of local economy and society.