Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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The Distribution of Chironomids by Flow Mechanisms - Artificial Channel Measurement -

흐름 메카니즘에 의한 깔따구들의 분포(I) - 인공수로 실험 -

  • Lee, Sang-Ho (Department of Civil and Construction Engineering, Pukyong National University) ;
  • Lee, Jung-Min (Department of Civil and Construction Engineering, Pukyong National University) ;
  • Park, Jae-Hyun (Department of Civil Engineering, Inje university) ;
  • Song, Mi-Young (Department of Biology, Pusan National University)
  • Received : 2005.10.25
  • Accepted : 2005.11.23
  • Published : 2006.01.30
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Abstract

Over the past few years, many studies have been conducted on the flow, sediment movement, pollution transportation and scour etc. However, very few attempts have been made at the hydraulic studies reflecting upon the ecological function. The objective of this study is to examine the structures of the flow and turbulence in an open circular channel and their relationship to distribution of the organisms and chironomids. Under different flow conditions, the organic matter and some chironomids were injected into the channel. Using the obtained velocity data, the flow mechanisms and the turbulent shear stresses were analyzed. Organic matters and chironomids were distributed on the region that the velocity was slower and the turbulent shear stresses were smaller. Some habitat moved even though chironomids were inhabited. This phenomenon has relationship with the flow mechanism. Some chironomids have distributed around the habitat structure of a hemisphere. The secondary flow has affected the deposition of the organic matters and the distribution of chironomids.

Keywords

Acknowledgement

Supported by : 한국과학재단

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