Method for inversion of water environment elements in estuary wetlands by hyperspectral sensor on UAV

Abstract

The invention discloses a method for inverting estuarine wetland water environment elements through a hyperspectral sensor on an unmanned aerial vehicle, and belongs to the field of water environmentsimulation. According to the method for inverting the estuarine wetland water environment elements through the hyperspectral sensor on the unmanned aerial vehicle, the estuarine wetland water environment elements are quickly calculated out in combination with the use of the unmanned aerial vehicle through the steps of collecting a water body sample of a unit research area, calculating the remote sensing reflectance of the water surface of the unit research area, analyzing a water environment of the unit research area, making unmanned aerial vehicle work preparation, collecting hyperspectral data of the unit research area, building a water environment model of the unit research area, collecting hyperspectral data of a to-be-tested research area, determining a water environment of the to-be-tested research area, and the like; the above steps are repeated to establish multiple groups of water quality content distribution images of the estuarine wetland research areas; and the change rulesof the water quality of the estuarine wetland research areas are compared and obtained in the same direction, so that the tidal creek water quality change conditions which are quickly and dynamicallychanged can be accurately captured, and the time and labor are saved.

Description

Technical field [0001] The invention relates to the field of water environment simulation, in particular to a method for inverting water environment elements of estuary wetland through a hyperspectral sensor on an unmanned aerial vehicle. Background technique [0002] Estuary wetlands are located in the ecological crisscross zone between river ecosystems and marine ecosystems. Under the interaction of brackish and fresh water, the estuary wetland plays the role of corridor, filter and barrier to the logistics, energy flow, information flow and biological flow between rivers and marine ecosystems, and has unique ecological value and resource potential. The water, sand, water and salt, chlorophyll a, total nitrogen, and total phosphorus in the salt-fresh water interaction zone are the key water environment elements of the estuary wetland, and their distribution in time and space directly reflects the two-way interaction mode of tidal current and runoff in the estuary wetland As we...

AI Technical Summary

Problems solved by technology

However, due to the low spectral reflectance of the water body, the small changes in the content of various elements in the tidal trench have a very slight impact on the spectral curve, and the content of the water environment elements cannot be obtained by directly analyzing the spectral curve; in addition, the spectral bands of hyperspectral sensors are often If there are more than 100 spectral resolutions, the data redundancy will be increased if the spectral resolution is too high. Step-by-step screening and modeling for all spectral segments is often time-consuming and labor-intensive, and accurate inversion results cannot be obtained.

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