TEXTURAL ANALYSIS AND MODELING OF A FLOOD DEPOSIT - RIVER SEVERN, UK

被引:94
作者
MARRIOTT, S
机构
[1] Postgraduate Research Institute for Sedimentology, University, Reading, RG6 2AB
关键词
FLOOD; FLOODPLAIN; GRAIN SIZE DISTRIBUTION; OVERBANK SEDIMENTATION; SUSPENSION; TURBULENT DIFFUSION;
D O I
10.1002/esp.3290170705
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Samples of sediment collected from the Severn floodplain between Worcester and Gloucester following the severe flooding in January and February 1990, were analysed for their grain size distribution. The results show that most sand was deposited within 20 m of the channel bank, but that fine sand may contribute to flood sediment across the width of the floodplain. James'(1985) numerical model of overbank sedimentation attempts to predict the transfer of sediment to the floodplain during flooding. Geometrical and hydraulic data relating to the Severn flood are used as input for a computer program of James'(1985) model. The pattern of sediment concentrations predicted by the model was compared with that obtained from statistical analysis of the flood sediment. The patterns were found to be similar, so James'(1985) model was considered to predict in a relative sense the distribution of flood sediment.
引用
收藏
页码:687 / 697
页数:11
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