Inversion method and apparatus for water quality parameter concentration based on optimal combination of multiple bands

Abstract

The invention provides an inversion method and apparatus for water quality parameter concentration based on an optimal combination of multiple bands. The method comprises the following steps: acquiring the measured water quality parameter concentration at a sampling site and the hyperspectral reflectance data of a water body at the sampling point; screening the bands of the hyperspectral reflectance data by using a continuous projection algorithm so as to obtain a first band set; constructing a first partial least square inversion model according to the measured concentration and the corresponding hyperspectral reflectance data of the first band set; calculating the contribution value of the corresponding hyperspectral reflectance data of the first band set in the first partial least square inversion model; screening the first band set of the hyperspectral reflectance data according to the contribution value so as to obtain a corresponding second band set; constructing a second partial least square inversion model by using a partial least square algorithm and according to the measured water quality parameter concentration and the corresponding hyperspectral reflectance data of the second band set; and inputting the corresponding hyperspectral reflectance data of the second band set into the second partial least square inversion model for concentration inversion so as to obtain the inversion value of water quality parameter concentration.

Description

technical field [0001] The invention relates to the technical field of water quality remote sensing monitoring, in particular to a water quality parameter concentration inversion method and device with multi-band optimal combination. Background technique [0002] Lake-reservoir-type water sources not only provide a large amount of water resources for human beings, but also have important ecosystem functions, and are an important component of the global carbon cycle and nutrient cycle. However, with the intensification of human activities, lake-type water sources are constantly threatened by organic and inorganic pollution, and water environment problems are becoming more and more serious. The management and protection of the water environment requires large-scale, continuous water quality monitoring to support, and conventional water quality monitoring mostly uses laboratory analysis methods, which is not only time-consuming and laborious, but also can only obtain the water ...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a water quality parameter concentration inversion method and device with multi-band optimization combination to solve the problem of collinearity between spectra existing in the prior art when partial least squares model is used to invert the concentration of water quality parameters influence, which leads to the problem of strong uncertainty in the partial least squares model used

Images