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Research Article

Analysis of Eutrophication Patterns of Mid- and Downstream Regions of the Urban Gongji Stream during the Dry Season

춘천 도시하천 공지천의 중ㆍ하류 갈수기 부영양화 특성 분석

D. S. Jeong1
,
E. M. Hong2†
정 동성1
,
홍 은미2†
1Undergraduate Student, Department of Environmental Science, Kangwon National Unmiversity
2Assistant Professor, School of Natural Resources and Environmental Science, Kangwon National Unmiversity
1강원대학교 환경학과 학부생
2강원대학교 환경융합학부 조교수
*eunmi.hong@kangwon.ac.kr
31 December 2020. pp. 332-344
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Abstract

As urban river basins are exposed to various sources of pollution, their water quality may change rapidly. In particular, during the dry season, when the flow rate is reduced, eutrophication may easily lead to water pollution. Spatial variations in eutrophication patterns between the mid- and downstream regions of the urban Gongji stream, located at the center of Chuncheon, have been reported. Therefore, it is essential to assess the spatial characteristics through frequent on-site monitoring for efficient water quality management. In this study, eutrophication patterns of the mid- and downstream regions of the Gongji stream during dry season were assessed through on-site monitoring and water quality parameters were analyzed. Following eutrophication, overgrowth of attached algae occurred due to increased water temperature in the midstream region and overgrowth of phytoplankton due to altered hydraulic residence time occurred in the downstream region. Specifically, DO supersaturation caused by the overgrowth of attached algae in the midstream region reflected high diurnal DO fluctuations. Despite its similarity in shape with the nearby Uiam Lake, the downstream region showed differences in eutrophication patterns. Additional studies and management plans are warranted to control eutrophication of urban streams.

Keywords
Chlorophyll-a
Dry season
Eutrophication
Supersaturation
Urban stream
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Information
  • Publisher :Agriculture and Life Sciences Research Institute, Kangwon National University
  • Publisher(Ko) :None
  • Journal Title :Journal of Agricultural, Life and Environmental Sciences
  • Volume : 32
  • No :3
  • Pages :332-344
  • Received Date : 2020-07-02
  • Revised Date : 2020-08-24
  • Accepted Date : 2020-09-04
  • DOI :https://doi.org/10.22698/jales.20200027
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