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http://dx.doi.org/10.17663/JWR.2021.23.4.296

Spatio-temporal Evaluation of Air Temperature-Water Quality Elasticity in Tributary Streams According To Climate Change  

Park, Jaebeom (Daon Solution co., Ltd.)
Kal, Byungseok (Daon Solution co., Ltd.)
Kim, Seongmin (Nakdong River Environment Research Center, National Institute of Environmental Research)
Publication Information
Journal of Wetlands Research / v.23, no.4, 2021 , pp. 296-306 More about this Journal
Abstract
Elasticity is a statistical technique that interprets the changing pattern of another variable according to a change in one variable as a quantitative numerical value and provides more information than correlation analysis and is widely used in climate change research. In this study the elasticity was calculated and sensitivity analysis was performed using air temperature and water quality data of the major tributaries of the Nakdong River. In addition the confidence interval for the elasticity was calculated using the T-Test and the validity of the elasticity was examined. The strength of elasticity shows high strength in the order of summer>fall>spring>winter and the direction shows regional characteristics with both negative and positive elasticity. After performing hierarchical cluster analysis on monthly observation data they were classified into 5 clusters and the characteristics of each cluster were visually analyzed using a parallel coordinate graph. The direction and intensity of the air temperature elasticity show regional characteristics due to the relatively high population density and complex influencing factors such as sewage treatment plants, small-scale livestock houses and agricultural activities. In the case of TP it shows great regional variability according to the circulation of nutrients in the ecosystem caused by algae growth and death according to temperature changes. Since the air temperature elasticity of the major tributaries of the Nakdong River is over weak and is valid at the significance level of 5%, it was analyzed that there is a change in water quality according to the air temperature change.
Keywords
Tributary; Water Quality Elasticity; Confidence Interval; Climate Change;
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Times Cited By KSCI : 1  (Citation Analysis)
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