By Shoji Fukuoka, Hajime Nakagawa, Tetsuya Sumi, Hao Zhang
Sediments, which represent the skin of the Earth, begin their trip to rivers with the power bought from rainfalls, fl oods and different usual tactics. because of delivery of sediments, rivers enhance with a number of appearances and services, and play an important position within the actions of people and the lifestyles cycles of different species. River sediment, as a standard subject for river administration, has been the subject of continuous study in view that precedent days, and because then major progresses in river sediment study has been made. these days, river sediment is far extra hooked up to. Read more...
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Additional info for Advances in River Sediment Research
2000. Issues on reservoir sedimentation management in a sediment transport system, Proc. 8th Seminar of Japan Society of Dam Engineers (in Japanese). indb 19 7/22/2013 2:28:57 PM This page intentionally left blank Advances in River Sediment Research – Fukuoka et al. T. Li, F. W. L. Zhu State Key Laboratory of Water Resources and Hydropower Engineering, Wuhan University, Wuhan, China ABSTRACT: In this paper, we introduce a new norm, stable slope, to make alluvial riverbank stability assessment. The definition and calculation of stable slope is demonstrated, followed by the analysis of stable slope variation with bank composition.
The water stage of the sedimentation pool will rise in harmony with the inflow of flood flow, and soon, the flow gets over the partition bank. Therefore, some reinforcements of the surface of the separating bank are necessary to prevent from the scouring by the overflow. When the main reservoir controls flood by using the surcharge capacity, the water stages in the main reservoir and in the sedimentation pool become equal height and rise in harmony, thereby the separating bank is submerged. Meanwhile, the delta deposits are formed within the sedimentation pool by the sediment runoffs from the respective A and B Ravines that proceed downstream and are combined into one in due time.
As opposed to this, the third largest annual sediment Figure 4. Comparison of the calculated annual sediment yields with the measured data. Figure 5. Hyetograph of a rainfall event selected to estimate the hydrograph and sediment graph by the SERMOW ver. 2 model. 8 million m3 that yielded with only one large flood. 31 million m3. 5 times larger than that of the annual mean value. This fact should be taken into account in the design of the sedimentation pool. As an example, the rainfall event of which hyetograph is shown in Figure 5 is chosen to show the runoff hydrograph and sediment graph in the A Ravine.