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D-1.3.3 Estimation of Environmental Load Through Large River in East China Sea

[Contact Person]

Masataka Watanabe
Director,
Division of Water and Soil Environment
National Institute for Environmental Studies
Environment Agency
16-2 Onogawa, Tsukuba, Ibaraki 305, Japan
Tel.: 81-298-50-2338, Fax: 81-298-50-2576
E-mail: masawata@nies.go.jp

Total Budget for FY1997-FY1998

3,525,000 Yen (FY1998; 1,765,000 Yen)

Abstract

The research focuses on using TM data to monitor water quality in the Changjiang estuarine region. Two representative water quality parameters, chlorophyll-a and suspended solids, are estimated from the TM 117-38,39 on Oct.13, 1997. 6S code is applied to do atmosphere correction for TM visible bands which is taking gaseous absorption, atmosphere scattering and sun glint into account. The relation analysis suggests the band ratio of log(TM1/TM2) has the largest coefficient with the log(Chlorophyll-a) provided by SeaWiFs on Oct. 9, 1997. Based on this, the linear regression equation: log(chlorophyll-a) = 0.752 - 4.79 * log (TM1/TM2) (R = -0.697) is applied to the whole two scenes. Similarly, the commonly used equation log (S) = 2.7 + 1.06 log R(660, TM4) is applied to estimate the suspended solids.

[Key Words]

TM, Chlorophyll-a, Suspended Solids, 6S