Frequency analysis of the river profile with streambed structures.

Huaixiang Liu, Yongjun Lu

Tuesday 30 june 2015

17:54 - 17:57h at Oceania (level 0)

Themes: (T) Sediment management and morphodynamics, (ST) River morphodynamics

Parallel session: Poster pitches: 7B. Sediment - River

As a prevalent phenomenon, there are many streambed structures in rivers. The distribution of them was obviously in certain orders. This paper carried out numerical analysis and field work in natural rivers, to study the law of streambed structures’ distribution. The results indicated that: A river profile with streambed structures can be considered as an overlay of two parts: the average streambed line which reflect the total slope; and the wave line vibrating along this average streambed line which reflect the effect of bed forms. The two parts were then distinctively separated by the frequency analysis. Then the distribution of streambed structures can be calculated and analyzed more scientifically.