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http://dx.doi.org/10.11108/kagis.2019.22.3.010

An Analysis on the Usability of Unmanned Aerial Vehicle(UAV) Image to Identify Water Quality Characteristics in Agricultural Streams  

Kim, Seoung-Hyeon (Dept. of Environmental Engineering, Changwon National University)
Moon, Byung-Hyun (School of Civil, Environmental and Chemical Engineering, Changwon National University)
Song, Bong-Geun (Industrial Technology Research Institute, Changwon National University)
Park, Kyung-Hun (School of Civil, Environmental and Chemical Engineering, Changwon National University)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.22, no.3, 2019 , pp. 10-20 More about this Journal
Abstract
Irregular rainfall caused by climate change, in combination with non-point pollution, can cause water systems worldwide to suffer from frequent eutrophication and algal blooms. This type of water pollution is more common in agricultural prone to water system inflow of non-point pollution. Therefore, in this study, the correlation between Unmanned Aerial Vehicle(UAV) multi-spectral images and total phosphorus, total nitrogen, and chlorophyll-a with indirect association of algal blooms, was analyzed to identify the usability of UAV image to identify water quality characteristics in agricultural streams. The analysis the vegetation index Normalized Differences Index (NDVI), the Normalized Differences Red Edge(NDRE), and the Chlorophyll Index Red Edge(CIRE) for the detection of multi-spectral images and algal blooms collected from the target regions Yang cheon and Hamyang Wicheon. The analysis of the correlation between image values and water quality analysis values for the water sampling points, total phosphorus at a significance level of 0.05 was correlated with the CIRE(0.66), and chlorophyll-a showed correlation with Blue(-0.67), Green(-0.66), NDVI(0.75), NDRE (0.67), CIRE(0.74). Total nitrogen was correlated with the Red(-0.64), Red edge (-0.64) and Near-Infrared Ray(NIR)(-0.72) wavelength at the significance level of 0.05. The results of this study confirmed a significant correlations between multi-spectral images collected through UAV and the factors responsible for water pollution, In the case of the vegetation index used for the detection of algal bloom, the possibility of identification of not only chlorophyll-a but also total phosphorus was confirmed. This data will be used as a meaningful data for counterplan such as selecting non-point pollution apprehensive area in agricultural area.
Keywords
Unmanned Aerial Vehicle; Water System Monitoring; Vegetation Index; Non-Point Pollution; Algal Bloom;
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Times Cited By KSCI : 4  (Citation Analysis)
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