MY水电站课程设计.doc

Summary about the Miyun Hydropower The Miyun Reservior ,strides across Cao Rriver and Bai River ,twenty kilometers from the MiYun,is located in the north of that .The two rivers are combined into CaoBai River ,which is ten kilometers from the MiYun town, in the north of the town . The lowest watershed of the Cao River and Bai River is JinGou River ,whose height is 130 meters ,in which CaoRiver Reservior and BaiRiver Reservior are joined .The else part of the Cao River and Bai River ,whose height higher more than 130meters ,combined into a reservoir,namely MiYun Reservior .The several—annual mean river discharge is 50.5 m3/s . The MiYun Reservior , whose main mask are controlling flood and supplying water for agriculture ,is an integrated hydraulic engineering , and also could supply with the benefit of generating electricity. Some characteristic water level of the reservoir as follows : Dead water level : 126.0m ; Normal high water level : 157.5m ； Design flood level : 158.2m ；Check flood level ：159.5m ; Height of the top of dam: 160.00m . Main marine construction include : (1).Blockwater structures : The BaiRiver dam and the CaoRiver dam consist into the two Main dams and five secondary dams ,are rolled—out earth rock dam ;the highest dam is the BaiRiver main dam ,whose height is 66.4m ；CaoRiver main dam highs 56m ;each secondary dam high 15.7m-39.0m . (2).Outlet structures : ①.Spillway :including two ones in the left shore of the CaoRiver , first spillway and second spillway . The first spillway , is a normal one, whose bottom height is 140m , draing the 100—annual flood , which is five holes riverside type with bosomwall . The second spillway , is a abnormal one ,whose bottom height is 148.5m combining with the first one ,draining the 1000—annual flood , which is five open riverside type . ②.Tunnel : a. The generate electricity tunnel in the left shore of the BaiRiver , generating electricity and supplying with water for downstream agriculture ; a outlet sup