| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Sao Paulo State Univ Unesp, Dept Cartog, BR-19063841 Presidente Prudente, SP - Brazil
[2] Nanyang Technol Univ, Natl Inst Educ, Singapore 639798 - Singapore
[3] Sao Paulo State Univ Unesp, Dept Environm Engn, BR-12247004 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 3
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| Document type: | Journal article |
| Source: | REMOTE SENSING; v. 11, n. 19 OCT 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Suspended particulate matter (SPM) directly affects the underwater light field and, as a consequence, changes the water clarity and can reduce the primary production. Remote sensing-based bio-optical modeling can provide efficient monitoring of the spatiotemporal dynamics of SPM in inland waters. In this paper, we present a novel and robust bio-optical model to retrieve SPM concentrations for inland waters with widely differing optical properties (the Tiete River Cascade System (TRCS) in Brazil). In this system, high levels of Chl-a concentration of up to 700 mg/m(3), turbidity up to 80 NTU and high CDOM absorption highly complicate the optical characteristics of the surface water, imposing an additional challenge in retrieving SPM concentration. Since K-d is not susceptible to the saturation issue encountered when using remote sensing reflectance (R-rs), we estimate SPM concentrations via K-d. K-d was derived analytically from inherent optical properties (IOPs) retrieved through a re-parameterized quasi-analytical algorithm (QAA) that yields relevant accuracy. Our model improved the estimates of the IOPs by up to 30% when compared to other existing QAAs. Our developed bio-optical model using K-d(655) was capable of describing 74% of SPM variations in the TRCS, with average error consistently lower than 30%. (AU) | |
| FAPESP's process: | 15/21586-9 - Re-parametrization of a Quasi-Analytical Algorithm (QAA) to estimating the inherent optical properties in reservoirs of Tietê River |
| Grantee: | Enner Herenio de Alcântara |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 12/19821-1 - Bio-optical model parametrization to study the chlorophyll-A concentration along a cascade of reservoirs |
| Grantee: | Enner Herenio de Alcântara |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 19/00259-0 - Algorithms development to retrieve water quality parameters from space |
| Grantee: | Enner Herenio de Alcântara |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 15/18525-8 - Inversion model based on radiactive transfer equation for estimating the chlorophyll-a concentration in productive waters - Barra Bonita reservoir, Tietê River, SP |
| Grantee: | Fernanda Sayuri Yoshino Watanabe |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |