2004 Volume 57 Issue 4 Pages 66-67
The author proposed gate sabo dams in 1988. The term ‘gates’ remind of ones used in flood control dams and/or ones operated frequently to release sediment. The gates of sabo dams are different from them and are usually open except during times when discharged sediment can cause trouble downstream due to significant aggradation or flooding. Such gate sabo dams are renamed ‘shutter sabo dams’. The concept of the shutter sabo dams is discussed in this paper. The shutter is usually made of steel pipes so that water is permeable. The shutter usually retracted and dropped into position when necessary. In order to operate shutter sabo dams properly, it is necessary to obtain a variety of technical information such as rainfall, short-term rainfall prediction data, water discharge rates, water level, sediment transport rates and riverbed elevation on a real-time basis. A real-time data transmission system for these items of data, therefore, needs to be developed. It is also expected that further research and development will be conducted on the mechanisms of the shutter operating information system, such as sensors for sediment transport rates and riverbed elevation changes, a high speed information analytical system, and so on.