Event Title

Session D7: Efficiency of Two Different Types of Fishway, Ice-Harbor and Complex Type, Installed in the Gongju Weir, South Korea

Location

Groningen, The Netherlands

Event Website

http://fishpassage.umass.edu/

Start Date

24-6-2015 10:50 AM

End Date

24-6-2015 11:05 AM

Description

Abstract:

As weirs block the longitudinal connectivity of stream, fishway is normally installed to overcome blockage of migration and movement of aquatic organisms. Recently, three large weirs with fishways were constructed for efficient use of water in the Geum River which is one of the major rivers in South Korea. In this study, we monitored two types of fishway, Ice-harbor and complex type, installed at both ends of the Gongju weir in the Geum River using traps and PIT telemetry for three years (2012 – 2014). The complex type fishway consists of ice-harbor type and nature-like type fishway. The results showed that each species used fishway at different time, and it was related with ecological characteristics of each species. Attraction rate was higher at the Ice-Harbor type (8.9%) than complex type (4.2%). Passing rate was also higher at Ice- Harbor type (45.1%) than complex type (10.8%). Higher attraction rate of the iceharbor type may relate with large amount of water release from hydropower generator just beside of the Ice-harbor type. There were quite big difference between the passing rate of the Ice-habor type and complex type. The complex type fishway is three times longer than Ice-Harbor type, and this could be one of the factors that affect passing rate.

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Jun 24th, 10:50 AM Jun 24th, 11:05 AM

Session D7: Efficiency of Two Different Types of Fishway, Ice-Harbor and Complex Type, Installed in the Gongju Weir, South Korea

Groningen, The Netherlands

Abstract:

As weirs block the longitudinal connectivity of stream, fishway is normally installed to overcome blockage of migration and movement of aquatic organisms. Recently, three large weirs with fishways were constructed for efficient use of water in the Geum River which is one of the major rivers in South Korea. In this study, we monitored two types of fishway, Ice-harbor and complex type, installed at both ends of the Gongju weir in the Geum River using traps and PIT telemetry for three years (2012 – 2014). The complex type fishway consists of ice-harbor type and nature-like type fishway. The results showed that each species used fishway at different time, and it was related with ecological characteristics of each species. Attraction rate was higher at the Ice-Harbor type (8.9%) than complex type (4.2%). Passing rate was also higher at Ice- Harbor type (45.1%) than complex type (10.8%). Higher attraction rate of the iceharbor type may relate with large amount of water release from hydropower generator just beside of the Ice-harbor type. There were quite big difference between the passing rate of the Ice-habor type and complex type. The complex type fishway is three times longer than Ice-Harbor type, and this could be one of the factors that affect passing rate.

https://scholarworks.umass.edu/fishpassage_conference/2015/June24/68