development of fishway design criteria for floodplain species of the lower mekong basin

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: