@article{ART001008775},
author={Kim Taekeun},
title={Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data},
journal={Journal of Environmental Impact Assessment},
issn={1225-7184},
year={2006},
volume={15},
number={2},
pages={121-127}
TY - JOUR
AU - Kim Taekeun
TI - Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data
JO - Journal of Environmental Impact Assessment
PY - 2006
VL - 15
IS - 2
PB - Korean Society Of Environmental Impact Assessment
SP - 121
EP - 127
SN - 1225-7184
AB - The conventional water quality measurements by point sampling provide only site specifictemporal water quality information but not the synoptic geographic coverage of water qualitydistribution. To circumvent these limitations in temporal and spatial measurements, the use ofremote sensing is increasingly involved in the water quality monitoring research. In other toassess a trophic state of Yongdam reservoir using satellite imagery data, I obtained LandsatETM data and water quality data on 16th September and 18th October 2001. The approachinvolved acquisition of water quality samples from boats at 33 sites on 16th September and 30sites on 18th October 2001, simultaneous with Landsat-7 satellite overpass. The correlationcoefficients between the DN values of the imagery and the concentrations of chlorophyll-a wereanalyzed. The visible bands(band 1,2,3) and near infrared band(band 4) data of Septemberimage showed the correlation coefficient values higher than 0.9. The October image showed thecorrelation coefficient values about 0.7 due to the atmospheric effect and low variation ofchlorophyll-a concentration. Regression models between the chrophyll-a concentration and DNvalues of the Landsat imagery data have been developed for each image. The regression modelwas determined based on the spectral characteristics of chlorophyll, so the green band(band 2)and near infrared band(band 4) were selected to generate a trophic state map. The coefficient ofdetermination(R2) of the regression model for 16th September was 0.95 and that of theregression model for 18th October was 0.55. According to the trophic state map made based onAizaki’s TSI and chlorophyll-a concentration, the trophic state of Yongdam reservoir wasmostly eutrophic state during this study.
KW - Remote Sensing;Trophic State;Landsat ETM;Yongdam ReservoirCorresponding Author: Kim Tae Geun;Dept. of Environmental Engineering;Cheongju University;36 Naeduk-dong;Cheongju;Chungbuk360-764;Korea Tel: 82-43-229-8575 Fax: 82-43-229-8575 E-mail
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Kim Taekeun. (2006). Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data. Journal of Environmental Impact Assessment, 15(2), 121-127.
Kim Taekeun. 2006, "Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data", Journal of Environmental Impact Assessment, vol.15, no.2 pp.121-127.
Kim Taekeun "Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data" Journal of Environmental Impact Assessment 15.2 pp.121-127 (2006) : 121.
Kim Taekeun. Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data. 2006; 15(2), 121-127.
Kim Taekeun. "Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data" Journal of Environmental Impact Assessment 15, no.2 (2006) : 121-127.
Kim Taekeun. Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data. Journal of Environmental Impact Assessment, 15(2), 121-127.
Kim Taekeun. Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data. Journal of Environmental Impact Assessment. 2006; 15(2) 121-127.
Kim Taekeun. Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data. 2006; 15(2), 121-127.
Kim Taekeun. "Assessment of Trophic State for Yongdam Reservoir Using Satellite Imagery Data" Journal of Environmental Impact Assessment 15, no.2 (2006) : 121-127.
