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Development of Fishway Design Criteria for floodplain Species of the Lower Mekong Basin
Khampheng Homsombath, Lee Baumgartner, Jarrod McPherson, Tim Marsden, Garry Thorncraft, Oudom Phonekhampeng; Douangkham
Singhanouvong; Ubolratana Suntornratana
AFSPortland, 2015
The Mekong Catchment
Many different landscapes: China
Yunnan
Many different landscapes: Northern Laos
Luangprabang, Laos
Many different landscapes: Central/Southern
Many different landscapes: Cambodia border
Many different landscapes: Delta
Dry Season
Wet Season
Home of charismatic Megafauna!
And many small fish (over 900 species)
LMB – approx 2.2 million tonnes per annumAbout 2% of total world fish catch, 900 spp
Fish Beef Pork Chicken
kg/person/year kg/person/year kg/person/year kg/person/year
Lao PDR 29(48% animal
protein)
5 6 5
Cambodia 37(79% animal
protein)
2 3 2
Social Importance of fish
Importance of fish in sustenance diets
Importance of fish
Floodplain species
Floodplain development is increasing at an alarming rate
Fish Migration Concept
Regulator
Fish Migration Concept
Fishway
Fish Migration Concept
14 mainstem
dams proposed
Four stage project
Construct
Scope/research
Assess
Regulator (Study site)
Research different design aspects
Slope, turbulence, slot width etc
Different designs
Different designs
Future need: 1. Improved understanding of local physiology and ecology
Future need: 2. Ensuring developers and managers have the information!
Future need: 3. Putting it all into practice in a coordinated way
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Acknowledgements: