An Investigation of Flora and Fauna in Upper streams and Lower streams of
Weirs with and without a Fish-Way in Ham-an Stream |
Dong Wook Kim1, Je Chul Park1, and Jae Keun Ryu2† |
1Department of Environmental Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk 730-701, Korea 2Department of Environmental Engineering, Chungju National University, Chungju, Chungbuk 380-702, Korea |
Corresponding Author:
Jae Keun Ryu ,Tel: +82-02-383-0694, Fax: +82-02-383-0693, Email: ryu1773@naver.com |
Received: May 12, 2008; Accepted: September 5, 2008. |
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ABSTRACT |
The purpose of this study was, as a preliminary step for understanding the whole aspects of the impacts of a weir on the ecosystems in upper and
lower streams, to find out the impacts of the weirs with and without a fish-way. A survey on the aquatic ecosystem of upper and lower streams of
weirs in Ham-an Stream was carried out from June to October, 2006. Results of the investigation showed that some meaningful effects on the ecosystems
had occurred by the weirs.
The fish fauna in upper stream of the weir with a fish-way appeared to include 3 families, 8 species, and 184 individuals, while that in the lower
stream of the weir appeared to include 5 families, 14 species, and 664 individuals. The fish fauna in the upper stream of the weir without a fish-way
appeared to include 3 families, 9 species, 107 individuals, while that in the lower stream of the weir appeared to include 9 families, 19 species, 520
individuals, disclosing that, no matter with or without a fish-way, fish fauna species diversity and size of population were more abundant and bigger
in the lower stream than in the upper stream, but that difference of fish fauna species diversities between upper and lower streams of the weirs appeared
to be bigger for the weir with a fish-way than for the weir without a fish-way.
Benthos species diversity and size of population were found to be more abundant and bigger in lower stream than in upper stream, and in wet
season than in dry season. |
Keywords:
Weir | Upper stream | Lower stream | Flora | Fauna |
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