Use of raingauges network data in the short term prediction of urban pluvial floods
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Use of raingauges network data in the short term prediction of urban pluvial floods. Methods of interpolation Cloud tracking Future Work : radar images & Flood modelling. Maureen Coat ENSTA Paristech. Rainfall Data. Database available : 88 Raingauge Stations

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Use of raingauges network data in the short term prediction of urban pluvial floods

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Use of raingauges network data in the short term prediction of urban pluvial floods

Use of raingauges network data in the short termprediction of urban pluvial floods

Methods of interpolation

Cloud tracking

Future Work : radar images & Flood modelling

Maureen Coat

ENSTA Paristech


Rainfall data

Rainfall Data

  • Databaseavailable :

    • 88 Raingauge Stations

    • Rainfall Rate every 30 min

    • Between 06/06/2006 and 19/10/2009


42 raingauge stations in london

42 Raingauge stations in London :


Use of raingauges network data in the short term prediction of urban pluvial floods

  • Code in SQL , easyselection of rainfall rate:

    • Atany date

    • Atany time

    • In London

  • Only a discrete set of data…

  • But rainfallis a continuousphenomenon

  • => Interpolation in regulargridcells


  • Methods of interpolation

    Methods of interpolation

    • Manymethodsexist :

      • Inverse Distance Weight

      • Liska’sMethod

      • Polygone of Thiessen

  • The more efficient : KrigingMethod :

    • Designed for geophysical variables with a continuous distribution

    • Based on statistics

    • => Many data are required (Database)

    • WithMatlab


  • Use of raingauges network data in the short term prediction of urban pluvial floods

    Rainfall Rate Interpolation in London : (07/07/2009)


    Cloud tracking

    Cloud Tracking ?

    • The 07/07/2009 : Flash flood in London

    • Victoria Station , Edgware road, and Paddington have been evacuated


    Use of raingauges network data in the short term prediction of urban pluvial floods

    Rainfall Rate (mm/h) in London (07/07/2009) :

    Victoria Station

    Latitude : 51.5104444 Longitude : 0.1872222


    Use of raingauges network data in the short term prediction of urban pluvial floods

    Rainfall Rate (mm/h) in London (07/07/2009) :


    Use of raingauges network data in the short term prediction of urban pluvial floods

    Rainfall Rate (mm/h) in London (07/07/2009) :


    Use of raingauges network data in the short term prediction of urban pluvial floods

    Rainfall Rate (mm/h) in London (07/07/2009) :


    Use of raingauges network data in the short term prediction of urban pluvial floods

    Rainfall Rate (mm/h) in London (07/07/2009) :


    Future work comparison with radar images

    Future work :Comparisonwith radar images

    • Weather radar :

      • Estimated rainfall rates are derived indirectly from measurements of reflectivity

      • => subject to a combination of systematic and random errors

      • Conditional Merging ?

    Flood modelling :

    • Bemus (Belgrade Model of UrbanSewers) :

    • Rainfall Data is in Input

      • Influence of intensity

      • Influence of interpolation Method


    Thank you for your attention

    Thankyou for your attention

    Maureen Coat

    [email protected]


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