報告書番号

U98013

タイトル（和文）

衛星データによる森林計測手法の開発（その２）－葉面積指数ＬＡＩの推定－

タイトル（英文）

DEVELOPEMENT OF FOREST OBSERVATION METHOD USING REMOTE SENSING DATA - ESTIMATION OF LEAF AREA INDEX-

概要 （図表や脚注は「報告書全文」に掲載しております）

リモートセンシングによる森林植生の定量化を検討する観点から，葉面積指数の実測手法の比較と衛星データによる推定手法について検討し，光学式測定器による葉面積指数の間接測定法の適用性や，衛星データによる葉面積指数の遠隔観測手法の適用性が明らかになり，わが国の代表的な植生タイプを対象に，森林の葉面積指数の定量的な観測データを得ることが可能となった。

概要 （英文）

THE ESTIMATION OF THE LEAF AREA INDEX (LAI) BASED ON SATELLITE DATA WAS EXAMINED IN ORDER TO OBSERVE THE AMOUNTS OFFOREST LEAF.THE MAIN RESULTS ARE SUMMARIZED AS BELOW. (1) A COMPARISONOF DIRECT AND INDIRECT MEASUREMENTS OF LAI FOR TWO ARTIFICIAL FOREST STANDS AND DECIDUOUS TREE STANDS WAS CONDUCTED TO EXAMINE THE APPLICABILITY OF THE INDIRECT METHOD USING PLANT CANOPY ANALYZER. THE RESULT SHOWS THAT INDIRECT METHOD TENDS TO UNDERESTIMATE LAI AS COMPARED WITH DIRECT METHOD. HOWEVER, INDIRECT METHOD CAN BE APPLICABLE TO PRACTICAL USE BY USING COEFFICIENTS FOR EACH STAND. (2) COMPARISON WITH NORMALIZED VEGETATION INDEX (NVI) BASED ON THE SATELLITE DATA AND LAI BASED ON INDIRECT METHOD SHOWS GOOD RELATIONSHIP FOR BROAD RANGE OF LAI. (3) THE LAI MAP IN JAPAN ESTIMATED FROM NOAA DATA SHOWS GOOD AGREEMENT WITH LITERATURE DATA FOR SEVERAL FOREST TYPES. THIS LAI MAP HAS THE HIGHEST RESOLUTION (1-KM) IN JAPAN. FROM THE ABOVE RESULTS, IT WAS FOUND THAT THE INDIRECT MEASUREMENT IS APPLICABLE TO THE OBSERVATION OF LAI, AND LAI ESTIMATION USING SATELLITE DATA IS RELIABLE AS COMPARED WITH LITERATURE DATA.

報告者

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