狭窄库区和开阔溃坝区溃坝洪水物模试验研究

提出的沿水发段加（减）糙方法，使狭窄库区模型在水深大幅度变动情况下，为满足水流对模型糙率的要求而同时实现重力相似和阻力阻似，提供了有效的解决途径，阐述了溃坝洪水试验模型设计布置，列举了实例，所采用的自动控制技术和量测试器设备，可模拟各种溃决过程并能获得所需的各项试验参数，指出了开阔溃区溃坝洪水演变的基本特性。

Experimental Study on Dam Break Flood for Narrow Reservoir Front and Wide Dam Break Front

Considering the relation of the flow with the model roughness and gravity similarity and resistance similarity, the method of increasing (or reducing) roughness according to different water depths proposed in this paper provides effective solutions for the case of considerably changing water depth at a narrow reservoir front. This paper elaborates on the design and arrangement of dam break flood testing and gives some examples. By use of automatic control technology and the measuring apparatus adopted various dam break processes can be simulated and all the experimental paramenters needed can be obtained. The paper also describes the fundamental characteristics of dam break flood evolution at a wide dam break front.