1. Authorities want to control the flow of water -- rather than have the dam give way all at once -- by creating a spillway. 权威机构希望能建立一条引水通道，从而控制洪水流向，而不愿看到水坝一瞬间轰然倒塌。
2. This paper introduced the design, measurement accuracy and operation of the automatic external deformation monitoring system for dam slab and spillway of Lianhua hydropower station. 介绍莲花水电站大坝面板及溢洪道外部变形自动化监测系统设计、测量精度分析及运行情况。
3. On both sides of the urn Yuanyang Lake spillway dam, which is China's construction of modern science and technology with the first earth-rock dam, dam construction in China milestone. 溢洪道两侧是金塔鸳鸯湖水库大坝，它是我国用现代科学技术建造的第一座土石坝水库，是中国水坝工程建设的里程碑。
英英解释
n.
1. a channel that carries excess water over or around a dam or other obstruction
