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Get Together Meeting, 7 – 11 May 2006, Haifa, Israel

GABARDINE. Get Together Meeting, 7 – 11 May 2006, Haifa, Israel. WP 2 - Rainfall Uncertainty Model.

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Get Together Meeting, 7 – 11 May 2006, Haifa, Israel

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  1. GABARDINE Get Together Meeting, 7– 11 May 2006, Haifa, Israel WP 2 - Rainfall Uncertainty Model Haim Kutiel, Shlomit Paz, Lea Wittenberg(kutiel@geo.haifa.ac.il, shlomit@geo.haifa.ac.il, leaw@geo.haifa.ac.il)&Hadas Reiser(hraiser@geo.haifa.ac.il)Laboratory of Climatology,Department of Geography & Environmental Studies,University of Haifa

  2. GABARDINE Deliverables & Milestones

  3. GABARDINE D21 - Parameters of the Most Expected Rainfall Regime TOTAL(d)-Total rainfall [mm] accumulated from all rain spells of a given duration [days]

  4. RSL GABARDINE Example from Brindisi Sorted Accumulated Rainfall Sorted Rainfall Percentage

  5. GABARDINE D21 - Parameters of the MERR (Cont.) Parameters dealing with the rainy Season length: DAP (k)- Median Dateof Accumulated Percentage (k=10, 20, … ,90) of an annual rainfall [days, since September, 1] RSL - Rainy Season Length[days] from the date when 10% of the annual rainfall amount until the date of 90% were accumulated RSL=DAP(90)-DAP(10)

  6. GABARDINE Example from Brindisi

  7. GABARDINE D21 - Parameters of the MERR (Cont.) Parameters dealing with the Rain Spells: NRS(d)- Numberof Rain Spellsof a given duration [days]. Dividing TOTAL(d) by NRS(d) yields: TOTAL(d:/NRS(d)=RSY(d) RSY(d)-Rain Spell Yield [mm]. The average rainfall accumulated during all rain spells of a given duration [days]

  8. GABARDINE Example from Brindisi

  9. GABARDINE D21 - Parameters of the MERR (Cont.) Extreme values will be analyzed using two ratios: AMED(d) – Average:Median Ratio. AMED(d) = (Average(d)-Median(d))*100/Median(d) For a symmetrical distribution this parameter equals 0. High values of this ratio mean a positively skewed distribution caused by few extreme cases. (50R:50D)(d)-50% Rainfall:50% Rainspells Ratio. For a perfect fit, this ratio equals 1. High values of this ratio mean that very few rain spells contributed most of the rainfall.

  10. GABARDINE Example from Brindisi

  11. GABARDINE D21 - Parameters of the MERR (Cont.) Parameters dealing with the Dry Spells: DSD(j,r,p) – Dry Spells Distribution. This parameter calculates the time [days] elapsed from the last rainy day. DSD is calculated for each Julian day for any given daily rainfall threshold and any desired probability.

  12. GABARDINE Example from Brindisi

  13. GABARDINE Work to do All the MERR parameters described above, will be calculated for each of the four test sites: Algarve – Portugal Low Llobregat River area – Spain Thessaloniki Basin – Greece Southern Coastal Aquifer – Israel/Gaza

  14. Source: Lobo-Ferreira J.P.et al., 2006 - GABARDINE Test Site Characterization GABARDINE Algarve region - Portugal Raingauges’ Locations

  15. GABARDINE Low Llobregat River area - Spain Raingauges’ Locations Source: Sanchez-Vila X. et al., 2006 - GABARDINE Test Site Characterization

  16. GABARDINE The Thessaloniki Basin- Greece

  17. GABARDINE Southern Coastal Aquifer – Israel/Gaza

  18. GABARDINE Acknowledgements We would like to thank all those who helped us to obtain the required rainfall data: LNEC, Portugal, thanks are due mainly to Catarina Diamantino UPC, Spain, thanks are due mainly to Manuela Barbieri AUTH, Greece, thanks are due mainly to Christina Anagnostopoulou Israel Meteorological Service (IMS), thanks are due mainly to Ilana Cohen

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