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Estimation of the Effect of Water Quality Management Policy in Paldang Lake  

Choi, Jung-Hyun (Department of Environmental Science and Engineering, Ewha Womans University)
Ha, Joo-Hyun (Department of Environmental Science and Engineering, Ewha Womans University)
Park, Seok-Soon (Department of Environmental Science and Engineering, Ewha Womans University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.12, 2008 , pp. 1225-1230 More about this Journal
Abstract
A new approach based on the Seasonal Mann-Kendall Trend Analysis, was presented in this paper, in order to estimate effect of water quality management policy in Kyoungan Stream which is one of major tributaries into the Lake Paldang. The estimation was undertaken by comparing water quality trend slopes before and after implementation of the policy. The monthly water quality data of Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Nitrogen (TN) and Total Phosphorus (TP) measured from 1992 to 2005, were analyzed to determine the Kendall slopes before and after the Han River special policy implemented at 1998. The results indicated that the 1998 special policy would be effective in water quality improvement not at upstream but at downstream. This result agrees well with the previous water quality studies at Kyoungan stream. It was suggested that the presented approach could be an useful tool to estimate effect of a water quality management policy.
Keywords
Kyoungan Stream; Mann-Kendall Trend Analysis; Paldang Lake; Water Quality Management Policy;
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