Retrieval of Suspended Particulate Matter in Inland Waters with Widely Differing Optical Properties Using a Semi-Analytical Scheme

Autor(es)

Bernardo, Nariane ^[1] ; do Carmo, Alisson ^[1] ; Park, Edward ^[2] ; Alcantara, Enner ^[3]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: REMOTE SENSING; v. 11, n. 19 OCT 2019.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 15/21586-9 - Re-parametrização do algoritmo quase-analítico (QAA) para estimativa das propriedades ópticas inerentes nos reservatórios do Rio Tietê
• Beneficiário: Enner Herenio de Alcântara
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/19821-1 - Parametrização de modelo bio-óptico para o estudo da concentração de clorofila-A ao longo de reservatórios em cascata
• Beneficiário: Enner Herenio de Alcântara
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/00259-0 - Desenvolvimento de algoritmos para estimativa de parâmetros de qualidade de água via espaço
• Beneficiário: Enner Herenio de Alcântara
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/18525-8 - Inversão de modelo baseado na equação de transferência radiativa para estimar a concentração de clorofila-a em águas produtivas - reservatório de Barra Bonita, Rio Tietê, SP
• Beneficiário: Fernanda Sayuri Yoshino Watanabe
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado