Remote sensing indirect monitoring method of total amount of alga outside euphotic layer for eutrophiclake

Abstract

The invention provides a remote sensing indirect monitoring method of total amount of algae outside euphotic layer for an eutrophiclake. The method comprises the following steps: building a quantitative relationship between average concentration of alga chlorophyll a outside the euphotic layer and average concentration of alga chlorophyll a inside the euphotic layer or depth of the euphotic layerthrough Ecolight radiation transmission simulation on the basis of simulating vertical distribution of algae of algal bloom and non-algal bloom types; then indirectly realizing remote sensing monitoring of the total amount of the algae outside the euphotic layer subsequently based on known average concentration of the chlorophyll a inside the euphotic layer or euphotic layer depth remote sensing retrieval. Based on the method, interannual and monthly variation rules and space distribution of the alga total amount in water columns of the eutrophiclake even in the whole lakes can be finally accurately acquired.

Description

technical field [0001] The invention relates to the technical field of remote sensing, in particular to a remote sensing indirect monitoring method for the total amount of algae in the euphotic zone of eutrophic lakes. Background technique [0002] Remote sensing technology provides the possibility of rapid and large-scale monitoring of cyanobacteria. When cyanobacteria blooms broke out, the chlorophyll content in the water body increased significantly, resulting in changes in the spectral characteristics of the water body. Usually, the spectral characteristics of areas covered by cyanobacteria are significantly different from those of algae-free lakes. Remote sensing of water color in lakes can use diversity in sensor detection and inversion of water color parameters such as chlorophyll in inland water bodies. Therefore, satellite remote sensing data can be used to monitor cyanobacterial blooms. Currently MODIS, CBERS-1, TM, ETM, IRS-P6, LISS-3 and other remote sensing da...

AI Technical Summary

Problems solved by technology

[0005] However, the total amount of algae information in the entire water column is composed of two parts in the euphotic zone and outside the euphotic zone. Since remote sensing can hardly detect the water body information outside the euphotic zone, only the algae in the euphotic zone that can be monitored by remote sensing can only be considered. information or the apparent parameters of the water body to indirectly estimate the total algae information outside the euphotic zone

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