2024-03-28T12:34:50Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:02000001
2022-12-13T02:23:51Z
1:86
常呂川水系無加川における軟岩河床の低下対策に関する試験施工とその有効性
FIELD TRIAL AGAINST SCOURING OF SOFT ROCK RIVERBED IN THE MUKA RIVER OF THE TOKORO RIVER SYSTEM AND ITS EFFICACY
髙橋, 紳吾
TAKAHASHI, Shingo
木下, 誠一
KINOSHITA, Seiichi
鈴木, 利幸
SUZUKI, Toshiyuki
小泉, 和久
KOIZUMI, Kazuhisa
渡邊, 康玄
ワタナベ, ヤスハル
Watanabe, Yasuhau
中村, 哲
NAKAMURA, Satoru
The Muka River
riverbed degradation
widening of the low-water channel
covering the riverbed with gravel
In the Muka River of the Tokoro River system, riverbed scouring has been progressing, influenced by reduction in the river width as a result of river channel improvements, reduction in sediment supply from the upper reaches and increases in discharge in recent years. As the result of riverbed scouring, soft rock and volcanic ash layers have been exposed. The progressive riverbed scouring has caused the banks to lose their ability to protect against flooding and has caused the bridge piers to have inadequate embedment depth. These have resulted in a loss of flood safety. To explore effective measures against riverbed scouring, the characteristics of river bed scouring were investigated. To retard the presently progressing riverbed degradation and to plan for a fundamental countermeasure, field trial was done in which the low-water channel was widened and the exposed soft rock was covered by gravel. This paper reports the results of investigation and field trial, and examines the efficacy of such construction.
journal article
土木学会
2014-06
application/pdf
河川技術論文集
20
229
234
https://kitami-it.repo.nii.ac.jp/record/2000001/files/kasengijutsu,20,229-234.pdf
jpn
open access