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WP6: Perception of changes by populations and adaptation
Centre for Himalayan Studies
Olivia AubriotJoëlle Smadja
Ornella Puschiasis (Ph D student)
Objectives:
To study the socio-economic impact of climate change, its consequences on water availability & population practices
Impact of variability of water availability on practices: studied in the three main landscape units
Study areas
Geographical units Origin of water
Meltingof glaciers
Melting of snow
Rain
Springstorms
Monsoon
High mountains x x (x) (x)
Middle mountains x xx xxx
Low mountains or hills (x) xxx
Terai plain areas drained by rivers flowing - from the high chain
x x (x) xxx - from the Mahabharat (x) xxx
Table: Hydrological resources in the four geographical units of Nepal
High mountain case study: Pangboche and his territory
Middle mountain: Kharekhola-Jhubing
* Main economic activities are/ were – Cattle husbandry– Agriculture
* Many changes occured during the last 20-30 years : - Tourism
- Sagarmatha National Park- Lukla Airport- Water supply and hydro-electricity plants– Vegetable production (water consuming)– Political changes
Water mill supplied by the melting of a glacier+ melting of the snow
Water use
Hydro-electricity
Mills, pipes, fountains, sprinklers…
Water collected from other side of the river
The « kharka » : upland grazing area with a shelter + an enclosured field to produce fodder (not ploughed but receive manure)
The Koshi area
Flooded area in feb. 2010
Canal not completed
Changing course of the Koshi (120 km in 200 years)
3 main changes within the last 50 years in the Eastern part of the Koshi :
1. Clearing of the forest quite recent
US Army maps 1962 (western part) & 1959 (eastern)
Casestudies
2. Massive migration from the hills from the end of the 1960s -1970s
Inside the Koshi area:Grazing area
Serves as a road
3. Hydraulic infrastructures:
a. Koshi embankment (1964)
b. Canal irrigation systems from Koshi -Sunsari Morang Irrigation System= 61 000 ha, the largest of Nepal (1964 + 1978-2002)- Western koshi canal (1986). In Nepal : 13 800 ha lift irrigation and 13 100 ha canal
irrigation
Koshi water divertedin Chatara
Looking towards North
Looking towards South
Canal gates viewed from other bank
East canal gatesWest canal from dam
c. KOSHI BARRAGE(1959-1965)
OnlyFor India
27000 haIn Nepal
THANK YOU