Conceptualization of hydraulic and sedimentary processes in downstream reaches during flushing of reservoirs
2005 (English)In: Proceedings of the XXXI IAHR Congress [Elektronisk resurs]: Water engineering for the future : choices and challenges : COEX Seoul September 11-16, 2005, Seoul: Korea Water Resources Association , 2005, p. 2577-2588Conference paper, Published paper (Refereed)
Abstract [en]
The main focus of this paper is to describe the active hydraulic and sedimentary processes in downstream river reaches during flushing of sediments from reservoirs. During flushing extreme amounts of sediment may be released. Therefore, these processes are different than those downstream from dams and reservoirs not subjected to flushing. Hence, also the effects differ, which knowledge of may be of value for biologists, etc. During flushing of a reservoir a wave will be released to the downstream reaches. This wave can be divided into one water part and one sediment part. Initially they are in phase with each other, but with increased distance downstream from the dam, the transported sediment lags behind the water due to different traveling velocities. The paper treats when and where sedimentation occurs, and how this is related to the different traveling velocities of water and sediment. Also included are discussions on how the downstream effects during flushing differ from non-flushing effects, how visualization of effects can enhance both the analysis and communication with planners, politicians, etc., as well as discussions on how the studies of these effects can benefit from improved field-work methods.
Place, publisher, year, edition, pages
Seoul: Korea Water Resources Association , 2005. p. 2577-2588
Keywords [en]
hydrology, fluvial geomorphology, rivers, sediment transport, erosion, deposition, reservoir flushing, downstream effects
National Category
Earth and Related Environmental Sciences Oceanography, Hydrology and Water Resources Physical Geography Geology
Identifiers
URN: urn:nbn:se:hig:diva-2494ISBN: 8987898237 (print)OAI: oai:DiVA.org:hig-2494DiVA, id: diva2:119156
Conference
XXXI IAHR CONGRESS. 11-16 september, 2005, COEX, Seoul, Korea.
2009-05-262009-04-222018-03-13Bibliographically approved