Alluvial river bank collapse early warning method

A technology of river bank and scouring and silting, applied in the field of alluvial river bank collapse warning, can solve the problems of unreasonable inspection and difficult river bank collapse prediction, achieve good practical application value, easy acquisition, and improve prediction accuracy

Inactive Publication Date: 2012-04-11
WUHAN UNIV
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Therefore, it is not yet possible to test the rationality of the above model, and it i

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  • Alluvial river bank collapse early warning method
  • Alluvial river bank collapse early warning method
  • Alluvial river bank collapse early warning method

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Embodiment Construction

[0035] The invention proposes a new alluvial river bank collapse early warning method. The basic idea is: according to the collapse mechanism of the dual-structure river bank, that is, in the process of erosion and gradual steepening of the soft soil (such as sand, etc.) in the lower layer, there is a critical slope. When the actual slope of the soil layer reaches the critical slope, if As the water flow continues to wash away, the lower sandy soil layer will recede, the upper cohesive soil layer will be exposed and suspended, and the river bank will lose stability and collapse. The above situation is common in all major rivers. Due to the lack of actual measurement data of bank collapse in the collapsed bank section, it is very difficult to determine the true critical slope. The present invention adopts the maximum value of the maximum slope ratio of the measured section for many years under certain conditions (different river types, different geology) as the approach of the...

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Abstract

The invention discloses an alluvial river bank collapse early warning method. Aiming at collapse of a binary structure bank of an alluvial river under long-term action of water flow, the position of bank collapse can be forecasted early; meanwhile, rolling forecast can be continuously performed by utilizing the characteristics that river section data is relatively easily acquired and more forecasting times are present, and the forecast accuracy is improved. The method comprises the following steps of: determining a river bank stability index, forecasting river bed deposition and erosion change and performing early warning and judgment on the bank collapse. By using the bank slope stability index determining and judging standard, comparing with a forecast slope and combining with a gradingjudgment index system, the position of a dangerous bank section can be early warned, and technical support is provided for dike maintenance and management.

Description

technical field [0001] The invention proposes an alluvial river bank collapse early warning method capable of quantitatively evaluating the location of the bank collapse and its danger level, aiming at the banks and beaches of the binary structure of the alluvial river. Background technique [0002] Bank collapse is one of the major disaster forms of alluvial rivers, which occurs more frequently and is more harmful. The collapse mechanism of alluvial river banks is relatively complex, involving soil mechanics, geomorphology, river dynamics and other disciplines, and its prediction has always been a difficult point in flood control and disaster reduction. Existing researches on bank collapse prediction methods are mainly carried out from two aspects. One is the empirical relational formula based on the theory of river dynamics, such as the river correlation formula for estimating the collapse width of the river bank, the relational formula between the relative expansion widt...

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Application Information

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IPC IPC(8): E02B3/00
Inventor 李义天邓金运
Owner WUHAN UNIV
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