Corn waterlogging disaster assessment method and system based on unmanned aerial vehicle laser radar

Abstract

The invention provides a corn waterlogging disaster assessment method and system based on an unmanned aerial vehicle laser radar. The method comprises the steps that through LIDAR point cloud data, which are acquired in advance, of a corn planting area, the corn point cloud data of the corn planting area and ground point echo point cloud data are acquired; the canopy height information of the corn planting area is acquired according to the corn point cloud data and the ground point echo point cloud data; waterlogging disaster grading is carried out on the canopy height information of the corn planting area to acquire the waterlogging disaster assessment result of the corn planting area. The system comprises a point cloud data acquisition module, a canopy height information calculation module and a waterlogging disaster assessment module. According to the technical scheme of the invention, the occurrence range and the degree of a corn waterlogging disaster can be objectively and quickly monitored, which provides a technical support for the assessment and after-disaster recovery of the corn waterlogging disaster.

Description

technical field [0001] The invention relates to the application field of remote sensing of agricultural disasters, in particular to a method and system for evaluating corn waterlogging disasters based on unmanned aerial vehicle laser radar. Background technique [0002] Corn is the main food crop in my country and plays an important role in China's agricultural economy and even the national economy. Corn is a crop that requires a lot of water but is not resistant to waterlogging. Waterlogging disasters will cause a series of changes in physiological, biochemical and morphological characteristics of corn, such as the decline in the ability to absorb water and nutrients; the inhibition of aerobic respiration and the enhancement of anaerobic respiration. While consuming a large amount of nutrients, a large amount of harmful substances to the root system are produced, the photosynthetic efficiency of the leaves is reduced, the growth and development are inhibited, and in severe ...

AI Technical Summary

Problems solved by technology

Corn is a crop that requires a lot of water but is not resistant to waterlogging. Waterlogging disasters will cause a series of changes in physiological, biochemical and morphological characteristics of corn, such as the decline in the ability to absorb water and nutrients; the inhibition of aerobic respiration

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