nick van de giesen water for food
TRANSCRIPT
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Global Monitoring and Modeling of the Global Monitoring and Modeling of the Terrestrial Hydrological CycleTerrestrial Hydrological Cycle
Nick van de Nick van de GiesenGiesen
[email protected]@citg.tudelft.nl
Water Management Water Management Civil Engineering and GeosciencesCivil Engineering and Geosciences
Technical University DelftTechnical University Delft
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ChallengeChallenge
Source: B.Schultz UNESCO-IHE
Population: +40%
Agricultural water withdrawals: 70%
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The Green-Blue Revolution
will be knowledge intensive and location specific
ChallengeChallenge
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ChallengeChallenge
Knowledge generationKnowledge generation
Top down
Bottom up
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ChallengeChallenge
Knowledge generationKnowledge generation
Bottom up
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ChallengeChallenge
Knowledge generationKnowledge generationTop down
Source: Minnesota Historical Society, Wikimedia
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Top downTop down
Global hydrological model
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ApproachApproach
Global hydrological model
RemoteRemoteSensingSensing
ModelModel
Ground Ground ObservationsObservations
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ModelModel
Big machine:
100 T flops
Source: Argonne National Laboratory, Wikimedia
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World
ModelModel
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One pixel
• 1 ha (SRTM)
• 50 params
• 10 FLO/param
500 FLO / pixel evaluation
ModelModel
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One update
2*108 km2 * 100 pix/km2 * 500 FLO/pix
=
1013 FLO/Update
ModelModel
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One update per 1000 s
1013 / 1000 = 1010 FLOPS
ModelModel
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We have1014 FLOPS
10,000 runs in real time!
ModelModel
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ModelModel
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River runoff,Mm3/yr*pix @ 6’ resolution, PCGLOBWB, Marc Bierkens
ModelModel
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River runoff,Mm3/yr*pix @ 6’ resolution, PCGLOBWB, Marc Bierkens
ModelModel
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ApproachApproach
Global hydrological model
RemoteRemoteSensingSensing
ModelModel
Ground Ground ObservationsObservations
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Remote sensingRemote sensing
Prof. Wim Bastiaanssen, eLeaf
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ApproachApproach
Global hydrological model
RemoteRemoteSensingSensing
ModelModel
Ground Ground ObservationsObservations
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Ground observationsGround observations
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Ground observationsGround observations
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Ground observationsGround observations
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Ground observationsGround observations
Trans-African Hydro-Meteorological Observatory
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Ground observationsGround observations
Trans-African Hydro-Meteorological Observatory
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Ground observationsGround observations
Trans-African Hydro-Meteorological Observatory
20,000 stations
1 every 35 km
$200 / station
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Ground observationsGround observations
Trans-African Hydro-Meteorological Observatory
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Ground observationsGround observations
Coen Degen
Trans-African Hydro-Meteorological Observatory
Rain
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Ground observationsGround observations
Coen Degen
Trans-African Hydro-Meteorological Observatory
Rain
2( ) ( , , , )s dE x t dt f r v H
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Ground observationsGround observations
Coen Degen
Trans-African Hydro-Meteorological Observatory
Rain
10 7,348 10sE D
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Ground observationsGround observations
Trans-African Hydro-Meteorological Observatory
One sensor down…
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Ground observationsGround observations
http://tahmo.info
Trans-African Hydro-Meteorological Observatory
Crowd sourcing
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Approach (topApproach (top--down)down)
Global hydrological model
RemoteRemoteSensingSensing
ModelModel
Ground Ground ObservationsObservations
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Thank you for your attention!Thank you for your attention!
Nick van de Nick van de GiesenGiesen
[email protected]@citg.tudelft.nl
Water Management Water Management Civil Engineering and GeosciencesCivil Engineering and Geosciences
Technical University DelftTechnical University Delft