globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-21-5681-2017
Scopus记录号: 2-s2.0-85034440630
论文题名:
Experimental determination of the flood wave transformation and the sediment resuspension in a small regulated stream in an agricultural catchment
作者: Zumr D; , Dostál T; , Devátý J; , Valenta P; , Rosendorf P; , Eder A; , Strauss P
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期:11
起始页码: 5681
结束页码: 5691
语种: 英语
Scopus关键词: Agriculture ; Catchments ; Runoff ; Sediment transport ; Sedimentation ; Sediments ; Vegetation ; Agricultural catchments ; Deposited sediments ; Drainage channels ; Electrical conductivity ; Experimental determination ; Initial conditions ; Sediment re suspensions ; Straight channel ; Floods ; agricultural catchment ; baseflow ; discharge ; electrical conductivity ; experimental study ; flood ; flood wave ; peak flow ; resuspension ; sediment transport ; sediment trap ; soil erosion ; streamwater ; transformation ; Czech Republic
英文摘要: This paper presents the methodology used for artificial flood experiments conducted in a small artificial, trained (regulated) channel on the Nu.cice experimental agricultural catchment (0.5 km2/, central Czech Republic, and the results of the experiments. The aim was to monitor the transformation of the flood wave and the sediment transport within the channel. Two series of experiments were carried out in contrasting initial conditions: (a) in September, when the stream banks were dry, the baseflow was negligible, and the channel was fully overgrown with vegetation; and (b) in March, when the stream banks were almost water saturated, the baseflow was above the annual average, and there was no vegetation present. Within each campaign, three successive flood waves, each with an approximate volume of 17m3 and peak flow of ca. 40 L s-1, were pumped into the upper part of the catchment drainage channel. The transformation of the flood wave and the sediment transport regime within an approximately 400m long channel section were monitored by measuring the discharge, the turbidity, and the electrical conductivity in three profiles along the stream. On the basis of the results, it was concluded that there is a considerable amount of deposited sediment, even in the well-trained and straight channel that can be re-mobilized by small floods. Part of the recorded sediment therefore originates from the particles deposited during previous soil erosion events. The flood waves initiated in dissimilar instream conditions progressed differently . we show that the saturation of the channel banks, the stream vegetation and the actual baseflow had a strong influence on the flood transformation and the sediment regime in the channel. The sediment moves quickly in winter and early spring, but in the later part of the year the channel serves as a sediment trap and the resuspension is slower, if dense vegetation is present.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78997
Appears in Collections:气候变化事实与影响

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作者单位: Faculty of Civil Engineering, Czech Technical University in Prague, Prague, Czech Republic; T. G. Masaryk Water Research Institute, Prague, Czech Republic; Institute for Land and Water Management Research, Federal Agency for Water Management, Petzenkirchen, Austria

Recommended Citation:
Zumr D,, Dostál T,, Devátý J,et al. Experimental determination of the flood wave transformation and the sediment resuspension in a small regulated stream in an agricultural catchment[J]. Hydrology and Earth System Sciences,2017-01-01,21(11)
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