Laguna : 汽水域研究

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Laguna : 汽水域研究 11
2004-06 発行

多時期ASTER データを用いた宍道湖・中海の濁度・クロロフィルa 濃度推定

Estimation of turbidity and chlorophyll-a concentration in Lakes Shinji and Nakaumi using multi-date ASTER data
Sakuno, Yuji
Yamamoto, Masatomo
Yoshida, Takeshi
Matsunaga, Tsuneo
Kozu, Toshiaki
Takayasu, Katsumi
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Description
The high-resolution satellite sensor ASTER should be a useful tool for the monitoring of water quality in Lake Shinji and Lake Nakaumi. However, the method for extracting water quality information from ASTER data has not been established. This study presents a model for estimating turbidity and chlorophyll-a concentration(Chl-a)in these lakes using ASTER/in-site data sets. The validity of the model was checked using data from water quality surveys conducted simultaneously with satellite observation in these lakes. Consequently, the feasibility of quantifying turbidity and Chl-a with sufficient accuracy was shown using data of bands 1, 2, and 3 of ASTER. However, an accurate result could not be obtained without field validation of the model.