日本リモートセンシング学会誌
Online ISSN : 1883-1184
Print ISSN : 0289-7911
ISSN-L : 0289-7911
SPOT/HRVデータによるアオコ発生時の宍道湖表層クロロフィルa濃度分布の推定
作野 裕司松永 恒雄中山 大介六川 修一高安 克己國井 秀伸中村 幹雄山室 真澄
著者情報
ジャーナル フリー

1999 年 19 巻 2 号 p. 132-148

詳細
抄録

The objective of this study was to map the horizontal distribution of water-bloom, or "Aoko", in Lake Shinji, Shimane Prefecture, using SPOT HRV and concurrent field survey data. Surface chlorophyll-a concentration (C) was adopted as a measure of Aoko amount in lake surface water. Two kinds of empirical algorithms, single band regression and band ratio regression algorithms, were used to estimate C from SPOT HRV and in-situ C data acquired in the morning of October 9, 1997. The C distribution patterns derived from satellite data were compared with aerial photographs taken 1.5 hour prior to satellite overpass. Also, various options to determine path radiance values using "Dark pixel" method were examined. The following results were obtained : 1) Surface suspended solid concentration (SSC) affected the accuracy of the estimated C when single band algorithms were applied, 2) The ratio algorithm using HRV band 1 and 2, after path radiance removal, could reduce the influence of SSC and improved the accuracy of C estimation considerably, and 3) Aoko was found along the north shore of the lake with 4-8 km length, and it covered about 7% of the lake surface.

著者関連情報
© 社団法人 日本リモートセンシング学会
前の記事 次の記事
feedback
Top