Monitoring method based on unmanned aerial vehicle aerial survey riverway bank collapse process

Abstract

The invention discloses a monitoring method based on an unmanned aerial vehicle (UAV) aerial survey riverway bank collapse process, which belongs to the field of topographic data processing. The method comprises the following steps: carrying out UAV low-altitude aerial survey in a selected river reach, and determining the flight height and overlapping degree of a UAV according to the requirementson different riverbank parameter spatial resolutions to obtain aerial survey image data; correcting the topographic data by adopting an RTK carrier phase difference technology; carrying out dEM noisereduction processing through an image processing tool to obtain high-precision and high-resolution topographic data, acquiring the length a, the width b, the bank slope width c and the bank slope height h of a river bank longitudinal crack of bank caving in a river reach, and calculating the soil body volume and the critical gradient of critical balance; through multiple aerial survey data, applying ArcMap to calculate the topographic change of the river reach of the bank collapse river, and then calculating the annual bank collapse volume of the river reach scale. According to the invention,manpower can be saved, the work flow can be simplified, and the river bank collapse process can be efficiently monitored.

Description

technical field [0001] The invention belongs to the field of terrain data processing, and involves interdisciplinary subjects such as river bed evolution, sediment movement mechanics, and application of UAV aerial survey technology, and more specifically, relates to a monitoring method for river bank collapse based on UAV aerial survey. Background technique [0002] Bank collapse is the direct result of the erosion of the river bank by the impact water flow of the river channel. In essence, it is the cumulative process of scour at the foot of the slope and the sudden change of the bank slope caused by the static equilibrium state of the river bank soil. It affects the lateral migration and winding of the curved river. Peristalsis has an important effect. There are various types of bank collapses, which can be divided into Xibeng, Tiebeng and Wobeng according to the plane shape. According to the mechanical mode, it can be divided into shallow collapse, planar slide, arc slid...

AI Technical Summary

Problems solved by technology

However, limited by field conditions, it is difficult to install, maintain and arrange detection points for these detection equipment, so there are relatively few applications in actual bank collapse observation and monitoring at this stage

[0004] The current technical means and measurement methods require a lot of manpower and carry heavy tools, the operation is cumbersome and the accuracy is not high, and manual operation will bring unavoidable errors

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