Land quality monitoring method based on aerial hyperspectrum

Abstract

The invention discloses a land quality monitoring method based on an aerial hyperspectrum. The method comprises the following steps of step1, collecting aerial hyperspectral data of a land quality monitoring area, and collecting a sample of the land quality monitoring area in the field and carrying out heavy metal element content analysis; step2, pre-processing the aerial hyperspectral data; step3. reconstructing an aerial hyperspectral data spectrum to eliminate radiation distortion of ground and object spectrum caused by various atmospheric components; step4, extracting an aerial hyperspectral image spectrum of a sampling point in aerial hyperspectral remote sensing data; step 5, carrying out spectral transformation and correlation coefficient analysis, obtaining a correlation coefficient between a content and a soil spectral parameter, and finding a sensitive band of a characteristic spectrum; and step6, establishing aerial hyperspectral data to invert a land quality monitoring model, and acquiring a monitored soil nutrient and metal element content data. During application, a wide range of land-based data can be accurately acquired, a workload can be reduced, a land quality monitoring period is shortened, and cost is reduced.

Description

technical field [0001] The invention relates to the field of ecological environment monitoring, in particular to a land quality monitoring method based on aerial hyperspectral. Background technique [0002] The current high-intensity predatory development has seriously degraded the soil, which is mainly reflected in the decline of farmland soil nutrients, nutrient imbalance, and local heavy metals exceeding the standard. Therefore, carrying out land and soil quality evaluation research is of great significance to the standardized management, effective use and protection of land resources, and to ensuring food security. [0003] The traditional soil quality detection method needs to invest a lot of manpower and material resources to carry out geochemical sampling in the study area. Take 1:50,000 geochemical sampling as an example: the sampling density is 4-8 points / km 2 , each land sampling point takes more than one hour, and field monitoring usually requires long-term and ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high labor intensity, low efficiency, long cycle and high cost in the existing soil quality detection method, and provides a soil quality monitoring method based on aerial hyperspectral, which can accurately obtain large A wide range of land basic data can greatly reduce the workload, shorten the land quality monitoring cycle, and reduce the cost

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