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Universitat de les Illes Balears. Reunión PREDIMED 2014A 5-6 Junio. Implementation of the fully-distributed and physically-based FEST-WB model. A. Amengual. Grup de Meteorologia, Departament de Física, Universitat de les Illes Balears, Palma, Mallorca, Spain - PowerPoint PPT Presentation
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Montserrat flash-flood event
Implementation of the fully-distributed and physically-based FEST-WB modelA. AmengualGrup de Meteorologia, Departament de Fsica, Universitat de les Illes Balears, Palma, Mallorca, Spaine-mail: [email protected]
Universitat de les Illes BalearsReunin PREDIMED 2014A5-6 Junio1Implementation of the physically-based distributed FEST-WB modelOverview of the FEST-WB model
The Serpis flash-flood event
Preliminary results
Future tasks
2
1. Overview of the FEST-WB model Flash-flood Event-based Spatially-distributed rainfall-runoff Transformation including Water Balance Computes the main processes of the hydrological cycle:
EvapotranspirationInfiltrationSurface runoffFlow routingSubsurface flowGroundwater flow Snow dynamics1. Overview of the FEST-WB model
41. Overview of the FEST-WB model Computational domain is meshed with a net regular square cells (200 meters) Continuous soil moisture accounting:
Runoff is computed according to a modified SCS-CN method. Potential maximum retention, S, is updated as a linear function of the degree of saturation ():
Actual evapotranspiration, EVT, calculated using the Hargreaves equation
Surface and sub-surface routing: Muskingum-Cunge method in its non-linear form
Reservoir: Flow routing is described using the level pool scheme.
2. The Serpis flash-flood event: synoptic situation
1. Upper-level closed trough
2. Strong high pressures over Western Europe
3. Low pressures overnorthern Africa
4. Low-level jet: advection of warm and moist air toward Valencia from the Mediterranean
5. Orographic lifting(Sierra de Aitana) 6
2. The Serpis flash-flood event: synoptic situationQuasi-stationary MCSs7 Torrential precipitation took place on 11 and 12 October 2007 Accumulated precipitation amounts above 400 mm
The Serpis catchment is a small size basin with an area of 752.8 km2 and a length close to 74.5 km. Accumulated rainfall above 300 mm from 00 to 12 UTC 12 October 2007 inside this basin
2. The Serpis flash-flood event: observations8Peak discharges:
Vernissa: Qp=315 m3s-1Beniarrs: Qp=260 m3s-1Carrs: Qp=200 m3s-1
1 fatality. 200 people evacuated
2. The Serpis flash-flood event: observations9
3. Preliminary results103. Preliminary results
3. Preliminary results
3. Preliminary results
3. Preliminary results
11-12 Oct 2007
VernissaBeniarrsCarrsNSE0.010.500.79RMSE (m3s-1)59.537.020.8Error V 1.390.800.01Error Qp -0.26-0.02-0.06Error Tp (h)-1.0-1.0-5.0143. Preliminary results
11-12 Oct 2007
VernissaBeniarrsCarrsNSE0.010.500.79RMSE (m3s-1)59.537.020.8Error V 1.390.800.01Error Qp -0.26-0.02-0.06Error Tp (h)-1.0-1.0-5.0153. Preliminary results
11-12 Oct 2007
VernissaBeniarrsCarrsNSE0.010.500.79RMSE (m3s-1)59.537.020.8Error V 1.390.800.01Error Qp -0.26-0.02-0.06Error Tp (h)-1.0-1.0-5.0163. Preliminary results
174. Future tasksHow can we improve flash-flooding process knowledge and forecasting?
1. Which are the hydrological characteristics of extreme floods in the semi-arid Mediterranean environment? 1.1 To determine which are the main hydrological processes involved in flash-flooding for semi-arid river basins in the Mediterranean.
1.2 To assess which is the specific role of the infiltration mechanism, soil moisture content and Hortonian flow before flash-floods in semi-arid river basins.
2. How can we improve the hydrometeorological forecasting of flash-floods?
2.1 To study the predictability of high impact weather related to intense rainfall and flash-flooding.
2.2 To assess how meteorological uncertainties propagate through the hydrological models.
2.3 To examine flash-flood predictability through advanced ensemble prediction hydrometeorological systems.18