Title: Future Research Prospects on Flood Returning to Main Channel of Xijiang River
Abstract:The projects of constructing embankment massively on Xijiang River Basin not only lead to flood returning to main channel,but also change the flood channel storage relationship of the original natural...The projects of constructing embankment massively on Xijiang River Basin not only lead to flood returning to main channel,but also change the flood channel storage relationship of the original natural river,making that the flood sequences which are used for flood control planning and the risk assessment of flood disaster have lost their consistency.At present,the research of flood retaining to main channel is concentrated on the computation aspect of the flood's return to channel and modification to original state after the flood overflowing the channel,and lacks sufficient consideration of the encounter experience of main and branch flood and the interval flood,and also lacks systematic research of the causes of flood variation and frequency analysis method of inconsistency flood.This article suggested that use the hydrologic variation diagnosis system to carry on variation analysis towards hydrologic features in Xijiang River Basin,and then distinguish its space and time variation rule;Develop conceptive hydrological model of multi-input and single-output(MISOCHM) on the main and branch flood and the interval rainstorm and flood of middle and lower reaches of Xijiang River to simulate its flood forming process;Propose two frequency analysis method of inconsistency flood that one is based on MISOCHM model and another is based on Hilbert-Huang transformation to inquire into the flood frequency distribution of the river cross section under change environment and to appraise the Xijiang River embankment present situation and future flood prevention ability combined the flood prevention plan of Xijiang River Basin.The study results not only has important theoretical significance to water cycle and water environment security research under change environment,but also has important practical applications for river basin flood control planning and flood risk assessment.Read More
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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