title: [Construction of semi-analytical model for inversing total suspended matter in Lake Taihu and Chaohu and assessment of its applicability].
abstract: Total suspended matter is an important water quality parameter. Firstly, a semi-analytical model for inversing concentration of total suspended matter was constructed by simplifying the bio-optical model, using the in-situ data of Lake Taihu in spring and autumn and that of Lake Chaohu in summer. And then, its applicability was validated by MERIS and HJ-1 HSI data. The results showed that: (1) The optical range for inversing total suspended matter in Lake Taihu and Chaohu was between 730 nm and 832 nm except the oxygen absorption bands. (2) According to MERIS data, bands centered at 754 nm and 779 nm were both suitable for inversing total suspended matter in Lake Taihu whereas the band centered at 761 nm was not suitable due to the influence of oxygen absorption. (3) According to MERIS data, the relative error of this model increased with the time difference after satellite transit time. The relative errors of inversion results of this model were below 50% when the time difference was less than 3 hours, while they increased to more than 50% when the time difference exceeded 3 hours. (4) The seventeen bands of HJ-1 HSI data were all suitable for inversing total suspended matter in Lake Chaohu and its result was better than that in Lake Taihu using MERIS data.
authors.affiliation: Key Laboratory of Virtual Geographic Environment of Education Ministry, School of Geographic Science, Nanjing Normal University, Nanjing 210046, China. liuzhonghua1987@yeah.net
authors.forename: Zhong-Hua
authors.initials: ZH
authors.lastname: Liu
authors.forename: Yun-Mei
authors.initials: YM
authors.lastname: Li
authors.forename: Jing
authors.initials: J
authors.lastname: Tan
authors.forename: Yu-Long
authors.initials: YL
authors.lastname: Guo
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.forename: Ge
authors.initials: G
authors.lastname: Liu
mesh_terms: D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D005618:Fresh Water / Q000032:analysis; D019015:Geologic Sediments / Q000737:chemistry*; D060106:Lakes / Q000737:chemistry*; D008962:Models, Theoretical; D010316:Particle Size; D058998:Remote Sensing Technology; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical