대한원격탐사학회:학술대회논문집 (Proceedings of the KSRS Conference)
- 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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- Pages.543-546
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- 2006
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- 1226-9743(pISSN)
VALIDITY OF NDVI-BASED BIOPHYSICAL PARAMETERS FOR ECOSYSTEM MODELS
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Lee, Kyu-Sung
(Inha University, Department of Geoinformatic Engineering) ;
- Jang, Ki-Chang (Inha University, Department of Geoinformatic Engineering) ;
- Kim, Tae-Geun (Inha University, Department of Geoinformatic Engineering) ;
- Lee, Seung-Ho (Forestry Research Institute) ;
- Cho, Hyun-Guk (Forestry Research Institute)
- 발행 : 2006.11.02
초록
NDVI has been very frequently used to estimate several biophysical parameters that are required for ecosystem models. Leaf area index (LAI), canopy closure, and biomass are among those biophysical parameters that are estimated by empirical relationship with NDVI. However, the type of remote sensing signals (raw DN value, at-sensor radiance, atmospherically corrected reflectance) used can vary the calculation of NDVI. In this study, we tried to attempt to compare the influence of NDVI linked with forest LAI for the watershed-scale ecosystem models to estimate evapotranspiration. Landsat ETM+ data were used to obtain various NDVI values over the study area in central Korea. The NDVI-based LAI and the resultant evapotranspiration estimation were greatly varied by the remote sensing signal applied.