Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
권호 표지

Lake Water Quality Modelling Considering Rainfall-Runoff Pollution Loads

강우유출오염부하를 고려한 호수수질모델링

  • Cho, Jae-Heon (Department of Health and Environmental Hygiene, Kwandong University) ;
  • Kang, Sung-Hyo (Department of Health and Environmental Hygiene, Kwandong University)
  • 조재현 (관동대학교 보건환경위생학과) ;
  • 강성효 (관동대학교 보건환경위생학과)
  • Received : 2008.12.10
  • Accepted : 2008.12.29
  • Published : 2009.04.30
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Abstract

Water quality of the Lake Youngrang in the Sokcho City is eutrophic. Jangcheon is the largest inflow source to the lake. Major pollutant sources are stormwater runoff from resort areas and various land uses in the Jangcheon watershed. A storm sewer on the southern end of the lake is also an important pollution source. In this study, water quality modelling for Lake Youngrang was carried out considering the rainfall-runoff pollution loads from the watershed. The rainfall-runoff curves and the rainfall-runoff pollutant load curves were derived from the rainfall-runoff survey data during the recent 4 years. The rainfall-runoff pollution loads and flow from the Jangcheon watershed and the storm sewer were estimated using the two kinds of curves, and they were used as the flow and the boundary data of the WASP model. With the measured water quality data of the year 2005 and 2006, WASP model was calibrated. Non-point pollution control measures such as wet pond and infiltration trench were considered as the alternative for water quality management of the lake. The predicted water quality were compared with those under the present condition, and the improvement effect of the lake water quality were analyzed.

Keywords

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