Stream bed deformation and discontiniuty of debris flow

Wien

Forstliche Bundesversuchsanstalt

1982

S. 163-168

4 Abb., 2 Tab., 8 Lit. Ang.

Unselbständiges Werk

200004895

Beiträge zur Wildbacherosions- und Lawinenforschung (4) ; 144 (1982) , S. 163-168

This report is concerned with the actual situation of bed load movement in a torrent stream that still defies full understanding because of the complex nature of the variables involved. We investigated the actual situations of deposition in sabo-dam reservoirs and suveyed the deformation of stream beds for this report. Deposit materials by debris flows were assumed to be moved mainly from the section below the upper dam because of the division of deposits in sabo-dams. The surveyed sections were distinguished into two categories namely: deposited section and scoured ones as an effect of the survey. Debris flows were classified under two types: one that flowed down from the upper section, and the other that began to flow in the section. It was assumed that debris flow did not flow down continuously but occured in a few discontionuous sections. We described the characteristics of a stream section according to the volume and the frequency of debris flows that had occurred in it.