水库设计时一条隧洞的功能定位起着很重要作用，隧洞工程既可以为水库泄洪设施，也可以为输水设施，本水库的泄洪隧洞承担着导流、泄洪、灌溉供水，放空水库功能，隧洞选型消能计算很关键，出口与导流输水隧洞共用消力池。%A tunnel when reservoir design function orientation plays a very important role in tunnel en-gineering can be either for reservoir flood discharge facilities,can also be for water conveyance facili-ties,of this reservoir spillway tunnel under the diversion,flood discharge,irrigation water,emptying the reservoir features,tunnel type energy dissipation calculation is the key,export share stilling basin with diversion water conveyance tunnel.
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