RainGain program - Work Package 2 - by Patrick Willems - KU Leuven

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Description of the Work Package 2

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RainGain program - Work Package 2 - by Patrick Willems - KU Leuven

  1. 1. <ul><li>WP2 : Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Objective: develop and implement a system for estimation and forecasting of fine-scale (100m, minutes) rainfall </li></ul><ul><li>Rainfall estimation : combining data from radars (X & C-band) and rain gauges </li></ul><ul><li>Rainfall forecasting : combining with numerical weather prediction </li></ul><ul><li>implement and test for pilot sites (Leuven, Paris, Rotterdam, London) </li></ul><ul><li>applicable for urban areas of North-West Europe: guidelines, demonstrations, training, … </li></ul>
  2. 2. <ul><li>WP2 : Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Applications (see WP3, WP4): </li></ul><ul><li>Rainfall estimation : enable city water managers to develop reliable urban water strategies, including plans for urban flood prevention and pollution management </li></ul><ul><li>Rainfall forecasting : allow local city managers to forecast, warn about and control urban pluvial impacts at street level in real time </li></ul>
  3. 3. WP2 : Fine-scale rainfall data acquisition and prediction : Actions:
  4. 4. <ul><li>WP2 : Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Actions: </li></ul><ul><li>WP2 A5 & A6: Rainfall estimation </li></ul><ul><li>A5: Leuven workshop on radar technology, calibration and rainfall estimation (M3) </li></ul><ul><ul><li>Outcome: recommended methods for fine-scale rainfall estimation </li></ul></ul><ul><li>A6: rainfall estimation in pilot sites </li></ul><ul><ul><li>Outcomes: fine-scale rainfall estimates for recent storms in pilot sites + comparison with traditional rainfall estimates (without radar) </li></ul></ul>
  5. 5. <ul><li>WP2 : Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Actions: </li></ul><ul><li>WP2 A5 & A6: Rainfall estimation </li></ul><ul><li>Subtopics addressed: </li></ul><ul><li>Radar calibration and adjustment based on rain gauge data </li></ul><ul><li>Different calibration/adjustment methods </li></ul><ul><li>Comparison & integration of fine-scale (X-band, city scale; super- resolution C-band) with rain gauge and coarser (NWE-scale) C-band radar data </li></ul><ul><li>Rainfall estimation error/uncertainty analysis </li></ul><ul><li>Interfacing with the applications in WP3 & WP4 </li></ul>
  6. 6. <ul><li>WP2 : Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Actions: </li></ul><ul><li>WP2 A7 & A8: Rainfall forecasting </li></ul><ul><li>A7: London workshop on rainfall forecasting (M6) </li></ul><ul><ul><li>Outcome: recommended methods for fine-scale rainfall forecasting </li></ul></ul><ul><li>A8: implementation for pilot sites </li></ul><ul><ul><li>Outcomes: operational system for fine-scale rainfall forecasting in pilot sites + results for min. 10 extreme storms </li></ul></ul>
  7. 7. <ul><li>WP2 : Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Actions: </li></ul><ul><li>WP2 A7 & A8: Rainfall forecasting (short-term forecasting = nowcasting) </li></ul><ul><li>Subtopics addressed: </li></ul><ul><li>Combination of (fine and coarse scale) radar data with Numerical Weather Prediction (provided by national meteo services) </li></ul><ul><li>Use of lightning detection data </li></ul><ul><li>Advective-statistical forecast model </li></ul><ul><li>Spatial and temporal downscaling </li></ul><ul><li>Error/uncertainty estimation in function of forecast lead time / probabilistic forecasts </li></ul><ul><li>Interfacing with the applications in WP3 & WP4 </li></ul>
  8. 8. <ul><li>WP2 : Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Actions: </li></ul><ul><li>WP2 A9: Guidelines </li></ul><ul><ul><li>Outcome: reference and user’s manuals on developed technologies for rainfall estimation and forecasting </li></ul></ul><ul><ul><li>Training and dissemination during National Observer Meetings </li></ul></ul>
  9. 9. <ul><li>WP2: Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Timing: </li></ul><ul><ul><li>WP2 A5: rainfall estimation workshop Leuven: autumn 2012 </li></ul></ul><ul><ul><li>WP2 A6: autumn 2012 – spring 2014: all pilot sites </li></ul></ul><ul><ul><li>WP2 A7: rainfall forecasting workshop London: spring 2014 </li></ul></ul><ul><ul><li>WP2 A8: spring 2014 – spring 2015: all pilot sites </li></ul></ul><ul><ul><li>WP2 A9: once a year: National Observer Meetings </li></ul></ul>
  10. 10. <ul><li>WP2: Fine-scale rainfall data acquisition and prediction : </li></ul><ul><li>Workshop participants: </li></ul><ul><ul><li>workshop Leuven: about 20 radar experts </li></ul></ul><ul><ul><li>workshop London: about 20 radar + NWP experts </li></ul></ul><ul><ul><li>local workshops pilot sites: about 20 end users: city flood managers, water managers, consultants and industrial partners </li></ul></ul>
  11. 11. Leuven case <ul><li>Aquafin & </li></ul><ul><li>K.U.Leuven </li></ul><ul><li>X-band radar installed </li></ul><ul><li>since 2008 </li></ul><ul><li>City LAWR (DHI) </li></ul><ul><li>Site selection based on clutter tests </li></ul><ul><li>Experience with calibration </li></ul>
  12. 12. Other fine-scale radar projects in Europe <ul><li>Denmark : </li></ul><ul><li>X-band LAWR radar Aalborg </li></ul><ul><li>Comparison of different calibration procedures (incl. dynamic calibration) </li></ul><ul><li>Impact on urban drainage </li></ul>
  13. 13. Other fine-scale radar projects in Europe <ul><li>France – Lyon : </li></ul><ul><li>C-band radar located in the close vicinity </li></ul><ul><li>Rain gauges vs. radar </li></ul><ul><li>Study of intense rain cells </li></ul><ul><li>Impact on urban drainage </li></ul>
  14. 14. Other fine-scale radar projects in Europe <ul><li>France – Southern Alps : ( RHyTMME project) </li></ul><ul><li>Local X band radar network (4 radars, 2 operational) </li></ul><ul><li>Installed in mountainous area prone to orographically-induced flooding </li></ul><ul><li>Gap filling function in ARAMIS (C and S band network) </li></ul>
  15. 15. Other fine-scale radar projects outside Europe <ul><li>USA : </li></ul><ul><li>CASA ( Collaborative Adaptive Sensing of the Atmosphere ) </li></ul><ul><ul><li>Local X band network (moving from Oklahoma “Tornado Alley” to Fort Dallas in 2012) </li></ul></ul>
  16. 16. Other fine-scale radar projects in Europe <ul><li>USA : </li></ul><ul><li>Comparison polarimetric X-band vs. S-band </li></ul><ul><li>Impact on catchment runoff </li></ul>
  17. 17. Other fine-scale radar projects outside Europe <ul><li>Japan : </li></ul><ul><li>X -NET </li></ul><ul><li>Nationwide X-band Polarimetric Radar Network (26 radars cover about 80% of the total population) </li></ul>
  18. 19. Leuven case BELGIUM <ul><li>Contributors from Belgium: </li></ul><ul><li>Patrick Willems, K.U.Leuven </li></ul><ul><li>Johan Van Assel, Aquafin </li></ul><ul><li>Maarten Reyniers, Laurent Delobbe, </li></ul><ul><li>Royal Meteorological Institute of Belgium </li></ul>
  19. 20. Leuven case City of Leuven: urban drainage system of the villages Herent, Wisele & Wijgmaal
  20. 21. Leuven case City of Leuven: urban drainage system of the villages Herent, Wisele & Wijgmaal <ul><li>Area: 9.13 km 2 </li></ul><ul><li># people: 16,100 </li></ul><ul><li>9 tipping bucket rain gauges </li></ul><ul><li>In-sewer measurements: </li></ul><ul><ul><li>Water level + velocity in 2 pipes </li></ul></ul><ul><ul><li>Water level at 3 overflows </li></ul></ul><ul><ul><li>+ water level in river </li></ul></ul>
  21. 22. Leuven case Tipping bucket rain gauges: calibration
  22. 23. Leuven case Tipping bucket rain gauges: correction wind influence: TBR 2 TBR 1
  23. 24. Leuven case X-band radar installed since 2008: City LAWR (DHI)
  24. 25. Leuven case Provinciehuis RWZI Bierbeek Res. Riverside Ecowerf Micro Radar Clutter tests
  25. 26. Leuven case Beam cut-off
  26. 27. Leuven case X-band radar image
  27. 28. Leuven case X-band radar calibration
  28. 29. Leuven case X-band radar calibration G (mm/h)
  29. 30. Leuven case <ul><li>SP C-band radars </li></ul><ul><ul><li>Wideumont (RMI) </li></ul></ul><ul><ul><li>Zaventem (Belgocontrol) </li></ul></ul><ul><li>DP C-band radar: </li></ul><ul><ul><li>from beginning 2012 in Jabbeke </li></ul></ul>(Delobbe et al., 2006)

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