Journal of the Japan Society of Erosion Control Engineering, Vol.57,No.6,2005

Collection and application of hydrologic information for sabo management

Takahisa MIZUYAMA, Masaaki WATARI, Osamu WATANABE, Akihiko IKEDA, Yoshifumi SATOFUKA

Abstract

Hydrologic data such as rainfall, flow discharge rates and amounts of sediment transport are measured at Sabo offices. However, except for rainfall the data is not put to much practical use. In order to control mountain basins and mountain torrents, this type of data needs to be used. Herein is proposed an ideal system for collecting and applying hydrologic information. An example of data analyses is illustrated based on a storm that hit the Joganji river May 17, 2004. Hydrologic data; rainfall, flow discharge rate, bedload measured by using a hydrophone and suspended load sampled directly were obtained from the river. New sabo dams with some sort of a sediment control shutter are considered to be the ideal sabo structures and require all of this type of hydrologic information.

Key words:hydrologic data, sabo, collecting and applying system, hydrophone, Joganji river

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