A Remote Sensing Research Of Tai's Water Parameters Based On Semi-analytical Model

Affected by the economic development and human activities,the lake water environment problem increasingly prominent,has become the current human society cannot be ignored.In view of the lake water environment problems,lake water color remote sensing has been becoming more and more important research direction currently.In this paper,to investigate the causes of Taihu Lake's chlorophyll concentration distribution,and on the basis of the combination of MERIS remote sensing image,explore the category in Taihu Lake water chlorophyll of hyperspectral remote sensing image of suitability model by a new type of half analysis model.The Apple model,combined with atmospheric correction MERIS hyperspectral remote sensing data and Taihu Lake quasi-synchronous monitoring data,constructed the inversion model,and deeply discussed the applicability and practicability of the model from the relative line obtained by the inversion model.The main research contents and conclusions of this paper are as follows.(1)Work before modeling.Because of the influence of atmospheric material,such as water vapor,aerosol.MERIS remote sensing image is subject to a certain degree of interference,the result of the experiment accuracy can cause larger error.Modeling for correction of MERIS is crucial step before using BEAM software.For MERIS remote sensing image preprocessing,reduce the influence of atmosphere,with the result of the experiment using the MERIS of atmospheric radiation correction calibration image cutting data to build the inversion model of chlorophyll concentration,for improving the accuracy of research's results?(2)Constructed MERIS inversion model.Using remote sensing data and quasi synchronous monitoring data of water quality in Taihu Lake,is divided into the global random sampling points in Taihu Lake.Taihu partition sampling and suspended matter concentration as boundary of random sampling,respectively to three conditions of Taihu Lake build Apple model and normalized index model,with the data obtained from the information in the analysis of the Apple model suitability,accuracy,and is suitable for use in a study class II water in Taihu Lake,results show that the Apple model is superior to the normalized index model,more suitable for application in the Taihu Lake basin,but the accuracy of the model need to further optimize and improve.(3)Analysis of Taihu in time and space.The eutrophication degree of Taihu Lake was evaluated and analyzed.The results show that the measured values of algae in Taihu Lake in recent years are analyzed.In terms of time,due to the influence of temperature and wind,the chlorophyll concentration in spring and winter is low,and the chlorophyll concentration in summer is the highest.Spatially,Taihu Lake is lighter in the southeast than in the northwest,and lighter in the center than in the coastal waters.