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WP2 : Fine-scale rainfall data acquisition and prediction :

WP2 : Fine-scale rainfall data acquisition and prediction : Objective: develop and implement a system for estimation and forecasting of fine-scale (100m, minutes) rainfall Rainfall estimation : combining data from radars (X & C-band) and rain gauges

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WP2 : Fine-scale rainfall data acquisition and prediction :

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  1. WP2 : Fine-scale rainfall data acquisition and prediction : • Objective: develop and implement a system for estimation and forecasting of fine-scale (100m, minutes) rainfall • Rainfall estimation: combining data from radars (X & C-band) and rain gauges • Rainfall forecasting: combining with numerical weather prediction • implement and test for pilot sites (Leuven, Paris, Rotterdam, London) • applicable for urban areas of North-West Europe: guidelines, demonstrations, training, …

  2. WP2 : Fine-scale rainfall data acquisition and prediction : • Applications (see WP3, WP4): • Rainfall estimation: enable city water managers to develop reliable urban water strategies, including plans for urban flood prevention and pollution management • Rainfall forecasting: allow local city managers to forecast, warn about and control urban pluvial impacts at street level in real time

  3. WP2 : Fine-scale rainfall data acquisition and prediction : Actions:

  4. WP2 : Fine-scale rainfall data acquisition and prediction : • Actions: • WP2 A5 & A6: Rainfall estimation • A5: Leuven workshop on radar technology, calibration and rainfall estimation (M3) • Outcome: recommended methods for fine-scale rainfall estimation • A6: rainfall estimation in pilot sites • Outcomes: fine-scale rainfall estimates for recent storms in pilot sites + comparison with traditional rainfall estimates (without radar)

  5. WP2 : Fine-scale rainfall data acquisition and prediction : • Actions: • WP2 A5 & A6: Rainfall estimation • Subtopics addressed: • Radar calibration and adjustment based on rain gauge data • Different calibration/adjustment methods • Comparison & integration of fine-scale (X-band, city scale; super- resolution C-band) with rain gauge and coarser (NWE-scale) C-band radar data • Rainfall estimation error/uncertainty analysis • Interfacing with the applications in WP3 & WP4

  6. WP2 : Fine-scale rainfall data acquisition and prediction : • Actions: • WP2 A7 & A8: Rainfall forecasting • A7: London workshop on rainfall forecasting (M6) • Outcome: recommended methods for fine-scale rainfall forecasting • A8: implementation for pilot sites • Outcomes: operational system for fine-scale rainfall forecasting in pilot sites + results for min. 10 extreme storms

  7. WP2 : Fine-scale rainfall data acquisition and prediction : • Actions: • WP2 A7 & A8: Rainfall forecasting (short-term forecasting = nowcasting) • Subtopics addressed: • Combination of (fine and coarse scale) radar data with Numerical Weather Prediction (provided by national meteo services) • Use of lightning detection data • Advective-statistical forecast model • Spatial and temporal downscaling • Error/uncertainty estimation in function of forecast lead time / probabilistic forecasts • Interfacing with the applications in WP3 & WP4

  8. WP2 : Fine-scale rainfall data acquisition and prediction : • Actions: • WP2 A9: Guidelines • Outcome: reference and user’s manuals on developed technologies for rainfall estimation and forecasting • Training and dissemination during National Observer Meetings

  9. WP2: Fine-scalerainfall data acquisition and prediction: • Timing: • WP2 A5: rainfall estimation workshop Leuven: autumn 2012 • WP2 A6: autumn 2012 – spring 2014: all pilot sites • WP2 A7: rainfall forecasting workshop London: spring 2014 • WP2 A8: spring 2014 – spring 2015: all pilot sites • WP2 A9: once a year: National Observer Meetings

  10. WP2: Fine-scalerainfall data acquisition and prediction: • Workshop participants: • workshop Leuven: about 20 radar experts • workshop London: about 20 radar + NWP experts • local workshops pilot sites: about 20 end users: city flood managers, water managers, consultants and industrial partners

  11. Aquafin & • K.U.Leuven • X-band radar installed • since 2008 • City LAWR (DHI) • Site selection based on clutter tests • Experience with calibration Leuven case

  12. Denmark: • X-band LAWR radar Aalborg • Comparison of different calibration procedures (incl. dynamic calibration) • Impact on urban drainage Other fine-scale radar projects in Europe

  13. France – Lyon: • C-band radar located in the close vicinity • Rain gauges vs. radar • Study of intense rain cells • Impact on urban drainage Other fine-scale radar projects in Europe

  14. France – Southern Alps: (RHyTMME project) • Local X band radar network (4 radars, 2 operational) • Installed in mountainous area prone to orographically-induced flooding • Gap filling function in ARAMIS (C and S band network) Other fine-scale radar projects in Europe

  15. USA: • CASA (Collaborative Adaptive Sensing of the Atmosphere) • Local X band network (moving from Oklahoma “Tornado Alley” to Fort Dallas in 2012) Other fine-scale radar projects outside Europe

  16. USA: • Comparison polarimetric X-band vs. S-band • Impact on catchment runoff Other fine-scale radar projects in Europe

  17. Japan: • X-NET • Nationwide X-band Polarimetric Radar Network (26 radars cover about 80% of the total population) Other fine-scale radar projects outside Europe

  18. Leuven case BELGIUM Contributors from Belgium: Patrick Willems, K.U.Leuven Johan Van Assel, Aquafin Maarten Reyniers, Laurent Delobbe, Royal Meteorological Institute of Belgium

  19. City of Leuven: urban drainage system of the villages Herent, Wisele & Wijgmaal Leuven case

  20. City of Leuven: urban drainage system of the villages Herent, Wisele & Wijgmaal Leuven case • Area: 9.13 km2 • # people: 16,100 • 9 tippingbucketraingauges • In-sewermeasurements: • Water level + velocity in 2 pipes • Water level at 3 overflows • + water level in river

  21. Tipping bucket rain gauges: calibration Leuven case

  22. Tipping bucket rain gauges: correction wind influence: TBR 1 Leuven case TBR 2

  23. X-band radar installed since 2008: City LAWR (DHI) Leuven case

  24. Clutter tests Micro Radar RWZI Bierbeek Provinciehuis Ecowerf Res. Riverside Leuven case

  25. Beam cut-off Leuven case

  26. X-band radar image Leuven case

  27. X-band radar calibration Leuven case

  28. X-band radar calibration Leuven case G (mm/h)

  29. SP C-band radars • Wideumont (RMI) • Zaventem (Belgocontrol) • DP C-band radar: • frombeginning 2012 in Jabbeke Leuven case (Delobbe et al., 2006)

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