Home >Documents >Tibetan Plateau as Asian water tower

Tibetan Plateau as Asian water tower

Date post:24-Feb-2016
Category:
View:47 times
Download:0 times
Share this document with a friend
Description:
Transboundary Observation Programme on Water and Hazards to the Third Pole Environment Hua Ouyang. Tibetan Plateau as Asian water tower. . Xiangde Xu et al.: World Water Tower, an atmospheric perspective. Geophysical Research Letters ,2008. The ‘Third Pole’. The Big Melt: - PowerPoint PPT Presentation
Transcript:

ICIMOD

Transboundary Observation Programme on Water and Hazards to the Third Pole Environment

Hua OuyangInternational Centre for Integrated Mountain DevelopmentKathmandu, NepalInternational Centre for Integrated Mountain DevelopmentKathmandu, Nepal1Tibetan Plateau as Asian water tower

.Xiangde Xu et al.: World Water Tower, an atmospheric perspective. Geophysical Research Letters ,2008.2The Third PoleThe Big Melt: Glaciers in the high heart of Asia feed its greatest rivers, lifelines for two billion people. Now the ice and snow are diminishing.

April 2010Water: a key resourceRiverArea sq kmMean discharge (m3/s)% of glacier melt in river flowPopulation x1000Population densityWater per person m3/yearIndus1,081,718553344.8178,483165830Ganges1,016,124186919.1407,466401~2500Brahmaputra651,3351982412.3118,543182~2500Irrawaddy413,71013565unknown33,0978018,614Salween271,91414948.85,9822223,796Mekong805,604110486.657,198718934Yangtze1,722,1933400018.5368,5492142265Yellow 944,97013651.3147,415156361Tarim1,152,44840.28,0677754Total1,324,800Possibly up to 70% in the dry season4Disasters in South Asia (1975-2005)

Source: OFDA/Cred Database

South Asian countries are most vulnerable to floodsSocial-economic stress

Population growthFood securityHuman health

Climate change will depress agricultural yields most in HKH region in 2050

Sources: Mller and others 2009; World Bank 2008c. The figure shows the projected percentage change in yields of 11 major crops (wheat, rice, maize, millet, field pea, sugar beet, sweet potato, soybean, groundnut, sunflower, and rapeseed) from 2046 to 2055, compared with 19962005. The yield-change values are the mean of three emission scenarios across five global climate models, assuming no CO2 fertilization (a possible boost to plant growth and water-use efficiency from higher ambient CO2 concentrations). The numbers indicate the share of GDP derived from agriculture in each region. (The share for Sub-Saharan Africa is 23 percent if South Africa is excluded.) Large negative yield impacts are projected in many areas that are highly dependent on agriculture.8Gaps and ChallengesData availability and data sharing is constrainedFew observation stations in high altitudeOperation and Quality of the existing stations

Himalayas: A blank spot in IPCC AR4Reducing scientific uncertainty

We need to reduce scientific uncertainty!10As a regional organization ICIMOD is well placed to share data and information among scientists and policy makes and contribute t reduce the scientific uncertainty.Under-representation of meteorological stations in the high HimalayasElevation (m)Area ( 10,000 km2)No. met stationsDensity (No./10,000 km2)Below 30017.3641924.13300-1000175.491460.831000-2000175.122661.522000-300084.95530.623000-400072.17741.034000-5000141.73580.41>500072.00160.22

11Transboundary Observation Plan

Priorities: Transboundary CooperationRiver basin approaches (transboundary): East : Yaluzangbu-BrahmputureMiddle: Koshi river basin--GangesWest: Indus river basin

Site monitoring and integrated analysisExisting sitesNews sites: high elevation

Wetlands: Upstream-downstream LinkageAfter Falkenmark, 1999Relevant Projects Indus water availability, GTZ, from 2009-2011HYCOS, 2010-2012SRE-Himala, USAID/NASA, from 2010-2013Cryosphere, 2011-2015Kosi water resource and poverty reduction, CAS, from 2009-20011, ESPA/DFID

Scientific visionCapacity building for improved monitoring of ice and water resources in the region:Establish systems for monitoring the status and changes over time of snow, ice and water resources in the regionBuild capacity of relevant key institutions on monitoring of snow, ice and water resources using remote sensing and field based techniquesDevelop water availability scenarios for river basinsPromote data and information sharing

Thank youThank you

Popular Tags:

Click here to load reader

Embed Size (px)
Recommended