yanma reservoir is located in the upper reaches of Chenghe River in Fengmao Township, shanting. The total storage capacity is 23 million cubic meters and Xingli storage capacity is 14 million cubic meters. It is a large (II) reservoir with flood control as the main function and comprehensive utilization of irrigation, power generation and aquaculture. It is the largest reservoir in Zaozhuang City and one of the top ten reservoirs in Shandong Province.
The reservoir hub is composed of main dam, auxiliary dam, spillway, discharge tunnel and irrigation power generation project. The main dam is 171 meters long, with a crest width of 8.6 meters and a maximum dam height of 27.8 meters. It is a clay core sand shell dam and a homogeneous earth dam. The auxiliary dam is 94 meters long, with a crest width of 6. meters and a maximum dam height of 15. meters. It is a homogeneous earth dam. The spillway has four gates, each with a clear width of 1m and a maximum discharge of 2,27 cubic meters per second. The discharge tunnel is located at the left end of the main dam, which is a masonry corridor lined with reinforced concrete pipes, with a diameter of 2.14 meters, an entrance bottom elevation of 114.1 meters and a maximum discharge of 35.4 cubic meters per second. The fortification earthquake intensity is ⅶ, the elevation datum is the elevation of the abandoned Yellow River estuary, the check flood level is 132.91m, the design flood level is 129.75m, and the flood limit level is 125.m..
the average annual precipitation in yanma reservoir reservoir area is 765.8 mm, the average annual inflow is 76.9 million cubic meters, and the average annual evaporation is 122 mm. The rainfall from June to September accounts for more than 75% of the annual rainfall.