Laguna : 汽水域研究

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Laguna : 汽水域研究 8
2001-03 発行

衛星リモートセンシングによる宍道湖の一次生産量モニタリングの試み

Monitoring Primary Production in Lake Shinji Using Satellite Remote Sensing
作野 裕司
松永 恒雄
髙安 克已
國井 秀伸
中村 幹雄
六川 修一
ファイル
内容記述(抄録等)
To monitor the gross primary production(P_g) in Lake Shinji, a simple algorithm of the Pg estimation using chlorophyll-a(Chl.a) derived from satellite remote sensing data and the maximum primary production per Chl.a(P^Bm) derived from the in-situ water temperature (Tw) was proposed. Some assumptions for developing the algorithm were verified using field survey data obtained in the lake, 1995-1998. And the algorithm was applied to images and Tw data of different dates in the Lake. The following results were obtained. 1) The area average SPOT/HRV band ratio after offset removal showed high correlation (R = 0.98) for the area average in-situ Chl.a. 2) The primary production per Chl-a (P^B) almost reached saturation (≒P^Bm) under the irradiance below 400μEin/^m2/s condition. 3) The P^Bm showed relative high correlation(R = 0.71-0.73) for Tw. 4) The estimated P_g using the algorithm changed within the range of about 50-700mgC/m^3/hr in the lake.