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A platform for research: civil engineering, architecture and urbanism
Construction method of prediction model for thalweg transverse migration of alluvial river
The invention discloses a construction method of a prediction model for the thalweg transverse migration of an alluvial river. The construction method comprises the following steps that topographic data and river reach hydrological data are collected; an average value of the thalweg transverse migration distance and the flat beach river width of the whole river reach is calculated by utilizing a river reach averaging strategy; a dimensionless parameter is constructed by using the average value, and the dimensionless parameter is taken as the thalweg transverse migration rate of the alluvial river; and the correlation among the thalweg transverse migration rate, upstream inflow water and inflow sand conditions and a downstream erosion reference surface change value is analyzed, a prediction model of the thalweg transverse migration of the alluvial river is constructed. According to the construction method of the prediction model for the thalweg transverse migration of the alluvial river, the river reach thalweg transverse migration rate is constructed to represent the amplitude of thalweg transverse migration of the alluvial river, the characteristics of thalweg transverse migration of the whole river reach can be better reflected, and the defect that the amplitude of thalweg transverse migration is roughly determined through a river regime map is overcome; the prediction model can well predict the adjustment trend of the thalweg transverse migration of the alluvial river, and has guiding significance for understanding the riverbed evolution rule of the alluvial river and river regulation planning.
本发明公开了一种冲积河流深泓横向迁移预测模型的构建方法，包括：收集地形资料以及河段水文资料；利用河段平均策略，计算整个河段的深泓横向迁移距离和平滩河宽的平均值；利用平均值构建无量纲化参数，并将无量纲化参数作为冲积河流深泓横向迁移率；分析深泓横向迁移率、上游来水来沙条件以及下游侵蚀基准面变化值的相关关系，构建冲积河流深泓横向迁移的预测模型。本发明构建了河段深泓横向迁移率来表征冲积河流深泓横向迁移的幅度，可更好地反映整个河段的深泓横向迁移特点，弥补采用河势图粗略确定深泓横向迁移幅度的缺陷；预测模型可较好地预测冲积河流深泓横向迁移的调整趋势，对认识冲积河流河床演变规律和河道整治规划具有指导意义。
Construction method of prediction model for thalweg transverse migration of alluvial river
The invention discloses a construction method of a prediction model for the thalweg transverse migration of an alluvial river. The construction method comprises the following steps that topographic data and river reach hydrological data are collected; an average value of the thalweg transverse migration distance and the flat beach river width of the whole river reach is calculated by utilizing a river reach averaging strategy; a dimensionless parameter is constructed by using the average value, and the dimensionless parameter is taken as the thalweg transverse migration rate of the alluvial river; and the correlation among the thalweg transverse migration rate, upstream inflow water and inflow sand conditions and a downstream erosion reference surface change value is analyzed, a prediction model of the thalweg transverse migration of the alluvial river is constructed. According to the construction method of the prediction model for the thalweg transverse migration of the alluvial river, the river reach thalweg transverse migration rate is constructed to represent the amplitude of thalweg transverse migration of the alluvial river, the characteristics of thalweg transverse migration of the whole river reach can be better reflected, and the defect that the amplitude of thalweg transverse migration is roughly determined through a river regime map is overcome; the prediction model can well predict the adjustment trend of the thalweg transverse migration of the alluvial river, and has guiding significance for understanding the riverbed evolution rule of the alluvial river and river regulation planning.
本发明公开了一种冲积河流深泓横向迁移预测模型的构建方法，包括：收集地形资料以及河段水文资料；利用河段平均策略，计算整个河段的深泓横向迁移距离和平滩河宽的平均值；利用平均值构建无量纲化参数，并将无量纲化参数作为冲积河流深泓横向迁移率；分析深泓横向迁移率、上游来水来沙条件以及下游侵蚀基准面变化值的相关关系，构建冲积河流深泓横向迁移的预测模型。本发明构建了河段深泓横向迁移率来表征冲积河流深泓横向迁移的幅度，可更好地反映整个河段的深泓横向迁移特点，弥补采用河势图粗略确定深泓横向迁移幅度的缺陷；预测模型可较好地预测冲积河流深泓横向迁移的调整趋势，对认识冲积河流河床演变规律和河道整治规划具有指导意义。
Construction method of prediction model for thalweg transverse migration of alluvial river
一种冲积河流深泓横向迁移预测模型的构建方法
LI JIE (author) / CHU MINGHAO (author)
2021-11-02
Patent
Electronic Resource
Chinese
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