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http://dx.doi.org/10.3741/JKWRA.2002.35.6.753

A Study of the Relationship between In-stream Vegetation and Sediment Transport by a Hydraulic Model Experiment  

Lee, Sam-Hee (한국건설기술연구원 수자원환경연구부)
Publication Information
Journal of Korea Water Resources Association / v.35, no.6, 2002 , pp. 753-762 More about this Journal
Abstract
In-stream vegetation is an essential element of a stream channel. Vegetation plays an important role in flood control and the natural environment in stream channels. This research investigates the relationship between in-stream vegetation and stream changes. This study investigates the distribution characteristic of vegetation in some rivers of Korea. Although there are many physical factors that cause changes to streams, this research verified that in-stream vegetation caused sediment deposition. A hydraulic model experiment was conducted. Tests were conducted in a simulated gravel bed stream (bed slope 1/200) with Phragmites japonica. The average diameter of the bed load used was 0.3 mm and 27 kg were uniformly supplied for 1 hour under same hydraulic conditions. The deposition and scouring as well as the change of flow differed according to the density and arrangement of the Phragmites japonica. In-stream vegetation and stream channel change are closely related because deposition and scouring affects the distribution of vegetation.
Keywords
vegetation; Phragmites japonica; channel change; sediment; deposition and scouring;
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