Method for monitoring soil erosion based on unmanned aerial vehicle aerial photography

Abstract

The present invention discloses a method for monitoring soil erosion based on unmanned aerial vehicle aerial photography. The method is characterized by: adopting an unmanned low altitude aerial vehicle as a remote sensing platform, and integrating a digital camera, a differential GPS and a gyro platform; adopting a digital photography technology, and adopting a low altitude unmanned aerial vehicle with characteristics of high resolution and large scale to acquire a plurality of long-period observation image data of a research area; adopting a computer digital image processing system to import a processed image into a CAD; carrying out recognition and measurement on quantity and quality of soil erosion investigation factors in the CAD based on culture conformation law and image characteristics in the research area, wherein the factors comprise length, width, depth, volume and other factors of a channel; and calculating values of channel head advancing, channel widening, and channel down-cutting, and then calculating channel erosion and an average erosion modulus in many years so as to monitor soil erosion change in the whole research area, such that a convenient and efficient method is provided for good treatment and monitor of water and soil loss.

Description

1. Technical Field [0001] The invention relates to a method for monitoring soil erosion, in particular a method for monitoring soil erosion based on drone aerial photography. 2. Technical background [0002] The traditional soil erosion survey method is to set up ground samples and conduct regular measurements. At the same time, aerial remote sensing and space satellite remote sensing are commonly used for surveys, but the above-mentioned technologies have their obvious shortcomings and shortcomings: [0003] ① When setting up ground sample plots and runoff plots for regular actual measurement, the action is slow, the amount of labor is large, a large amount of labor is required, the cost is high, and the cycle is long; [0004] ②Using ordinary manned aerial remote sensing requires high cost due to many links such as transfer, which is difficult to carry out frequently and has poor safety; [0005] ③When using space satellite remote sensing monitoring, its temporal and spatial resolut...

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Problems solved by technology

[0003] ① When setting up ground sample plots and runoff plots for regular measurement, the action is slow, the workload is large, a large amount of manual input is required, the cost is high, and the cycle is long;

[0004] ②The use of ordinary manned aerial remote sensing is relatively expensive due to the need for many links such as transitions, and it is difficult to carry out frequently, and the safety is poor;

[0005] ③When space satellite remote sensing is used for monitoring, the temporal and spatial resolution is low, and the flight altitude is above the clouds, the image clarity is greatly affected by the clouds, and the erosion is mostly distributed in mountainous areas with complex terrain, so the accuracy is low, while the high resolution remote sensing imagery is expensive, and is also limited by the revisit cycle and the influence of clouds

[0006] Therefore, in the process of soil erosion investigation, when using traditional methods such as setting ground plots, runoff plots, manned aerial remote sensing and space satellite remote sensing, it will inevitably bring a lot of trouble and low efficiency.

Therefore, the existing technology has disadvantages such as high cost, long period, great influence by clouds, and poor security. How to reduce the cost, shorten the image update cycle, improve image clarity, and increase security without affecting the accuracy of aerial surveys has become an important issue. Problems to be Solved Urgently by Scientists and Technologists in the Field

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