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    WiBasin: basin management through an integrated platform  Open access

     Llort Pavon, Xavier; Sánchez-Diezma Guijarro, Rafael; Rodríguez, Álvaro; Sancho, David; Berenguer Ferrer, Marc; Sempere Torres, Daniel
    International Conference on Hydroinformatics
    p. 1-8
    Presentation's date: 2014-08-17
    Presentation of work at congresses

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    In this work we present WiBasin, a cloud platform for basin and dam management. It includes different sources of precipitation (both observed and forecasted), integration over the catchment domain (to provide an aggregated value of potential rainfall accumulated over the basin) , and a complete dissemination environment (web-viewer, capability of issuing hazard warnings with configurable thresholds, SMS, mails, etc.)

    In this work we present WiBasin, a cloud platform for basin and dam management. It includes different sources of precipitation (both observed and forecasted), integration over the catchment domain (to provide an aggregated value of potential rainfall accumulated over the basin) , and a complete dissemination environment (web-viewer, capability of issuing hazard warnings with configurable thresholds, SMS, mails, etc.)

    Postprint (author’s final draft)

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    FloodAlert: a simplified radar-based EWS for urban flood warning  Open access

     Llort Pavon, Xavier; Sánchez-Diezma Guijarro, Rafael; Rodríguez, Álvaro; Sancho, David; Berenguer Ferrer, Marc; Sempere Torres, Daniel
    International Conference on Hydroinformatics
    p. 1-8
    Presentation's date: 2014-08-17
    Presentation of work at congresses

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    In this work we present FloodAlert, a simplified flood Early Warning System [EWS] based on the use of radar observations and radar nowcasting to issue local flood warnings. It is a web-based platform and it is complemented with a flexible and powerful dissemination module.

    In this work we present FloodAlert, a simplified flood Early Warning System [EWS] based on the use of radar observations and radar nowcasting to issue local flood warnings. It is a web-based platform and it is complemented with a flexible and powerful dissemination module.

    Postprint (author’s final draft)

  • A simplified radar-based EWS for urban flood warning

     Llort Pavon, Xavier; Sánchez-Diezma Guijarro, Rafael; Rodríguez, Álvaro; Ferrer Sumsi, Miquel; Berenguer Ferrer, Marc; Sempere Torres, Daniel
    European Conference on Radar in Meteorology and Hydrology
    p. 159 HS-
    Presentation's date: 2012-06-27
    Presentation of work at congresses

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  • Dam and basin management through an integrated platform

     Llort Pavon, Xavier; Sánchez-Diezma Guijarro, Rafael; Sancho, David; Ferrer Sumsi, Miquel; Hernández, Olver; Berenguer Ferrer, Marc; Sempere Torres, Daniel
    European Conference on Radar in Meteorology and Hydrology
    p. 160 HS-
    Presentation's date: 2012-06-27
    Presentation of work at congresses

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  • Implications of radar rainfall estimates uncertainty on distributed hydrological model predictions

     Schröter, Michael; Llort Pavon, Xavier; Velasco Forero, Carles; Ostrowski, M.; Sempere Torres, Daniel
    Atmospheric research
    Vol. 100, num. 2-3, p. 237-245
    DOI: 10.1016/j.atmosres.2010.08.014
    Date of publication: 2011-05
    Journal article

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  • Radar rainfall: separating signal and noise fields to generate meaningful ensembles

     Pegram, Geoff; Llort Pavon, Xavier; Sempere Torres, Daniel
    Atmospheric research
    Vol. 100, num. 2-3, p. 226-236
    DOI: 10.1016/j.atmosres.2010.11.018
    Date of publication: 2011-05
    Journal article

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    For the purpose of generating meaningful stochastic ensembles of radar estimates of rainfall, a relatively simple and objective method of separating a radar rainfall image into signal and noise is described. An alternative noise field, with the same spectrum as the original noise, can then be simulated and combined with the signal field of each successive image, to generate an ensemble member for performing sensitivity studies. The method is based on identifying the appropriate wavelength in the power spectrum which defines the variance threshold used to separate noise from signal. The algorithm is explained and figures illustrate the efficacy of the procedure.

  • Hydrometeorological value of X-band radar RAINSCANNER® observations

     Park, Shinju; Berenguer Ferrer, Marc; Sempere Torres, Daniel; Llort Pavon, Xavier; Didszun, Jens; Pfeifer, Monika
    Conference on Radar Meteorology
    p. 140-
    Presentation's date: 2011-10-27
    Presentation of work at congresses

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  • A study of the structure of radar rainfall and its errors  Open access

     Llort Pavon, Xavier
    Department of Geotechnical Engineering and Geo-Sciences, Universitat Politècnica de Catalunya
    Theses

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    Els objectius principals d’aquesta tesi són dos: d’una banda estudiar l’estructura de la variabilitat de la precipitació a diferents escales espacials i temporals, i de l’altra, estudiar l’estructura dels errors en les estimacions quantitatives de precipitació a través de radar. Pel que fa a l’estudi de l’estructura de la precipitació es proposa un marc de comparació per a mètodes de downscaling basat en valorar el grau amb què cada mètode és capaç de reproduir la variabilitat observada a les diferents escales de la pluja i la seva estructura multifractal. Finalment es proposa un mètode de downscaling tridimensional per a generar camps de precipitació d’alta resolució. Partint de dades mesurades amb radar, és capaç de reproduir la variabilitat a totes les escales de la pluja, i a la vegada, conservar l’estructura vertical de la precipitació observada pel radar. En aquesta tesi s’estudia també l’estructura dels errors associats a les mesures de radar, tant terrestre com embarcat en satèl·lit, que queden després de la cadena de correcció. Es realitza un estudi mitjançant simulació física de les observacions del radar, sobre un camp de precipitació d’alta resulució, per caracteritzar l’error relacionat amb la distància d’observació. També es caracteritza l’error total en les estimacions quantitatives de pluja dels radars terrestres mitjançant comparació contra un producte de referència basat en la combinació de radar i pluviòmetres. L’estructura de l’error trobada ha estat usada per generar un ensemble d’estimacions de pluja, que representa la incertesa en les estimacions, i pot ser emprat per aplicacions probabilístiques. Pel que fa a l’estudi de l’estructura de l’error associat a les estimacions de radar embarcat en satel·lit, s’han realitzat comparacions del radar embarcat en el satèl·lit TRMM contra equipament terrestre, per tal de caracteritzar, sota diverses condicions, les diferències en les mesures de precipitació.

    The principal objectives of this thesis are two: on one hand study the structure of the precipitation’s variability at different spatial and temporal scales, and on the other hand study the structure of the errors in the quantitative precipitation estimates by radar. In relation to the precipitation structure, a comparison framework for downscaling methods is proposed. Within this framework, the capability of each method reproducing the variability and multifractal behaviour observed in rainfall can be tested. A three-dimensional downscaling method to generate high-resolution precipitation fields from radar observations is proposed. The method is capable to reproduce the variability of rainfall at all scales and, at the same time, preserve the vertical structure of precipitation observed by the radar. In this thesis the structure of the errors that remain after the correction chain in radar measurements (both ground- and space-borne) is also studied. Simulation of the radar physical measurement process over high-resolution precipitation fields is performed to characterize the error related with range. The overall error in quantitative precipitation estimates by radar is characterized through comparison of radar estimates with a reference product based on a radar-raingauges merging. The error structure is used to generate a radar ensemble of precipitation estimates that represents the uncertainty in the measurements and can be used in probabilistic applications. Regarding the study of the errors associated to spaceborne radar measurements, comparisons of TRMM Precipitation Radar with ground equipment are performed to characterize the discrepancies between the precipitation estimates under different conditions.

  • Comparison of two rainfall downscaling methods

     Llort Pavon, Xavier; Berenguer Ferrer, Marc; Sempere Torres, Daniel; Zawadzki, Isztar
    European Conference on Radar in Meteorology and Hydrology
    Presentation's date: 2010-09-09
    Presentation of work at congresses

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  • Comparison of TRMM Radar Rainfall Estimates with NOAA Next Generation QPE

     Amitai, Eyal; Llort Pavon, Xavier; Sempere Torres, Daniel
    Journal of the Meteorological Society of Japan
    Vol. 87A, p. 109-118
    DOI: 10.2151/jmsj.87A.109
    Date of publication: 2009-01
    Journal article

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  • Error structure in radar-based precipitation estimates

     Llort Pavon, Xavier; Sempere Torres, Daniel; Berenguer Ferrer, Marc; Zawadzki, Isztar; Germann, Urs
    European Geosciences Union General Assembly
    Presentation's date: 2007-04-18
    Presentation of work at congresses

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  • Study of the attenuation error structure

     Llort Pavon, Xavier; Berenguer Ferrer, Marc; Sempere Torres, Daniel; Zawadzki, Isztar
    Conference on Radar Meteorology
    Presentation's date: 2007-08-07
    Presentation of work at congresses

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  • A comparison of precipitation downscaling methods

     Llort Pavon, Xavier; Berenguer Ferrer, Marc; Sempere Torres, Daniel; Zawadzki, Isztar
    European Geosciences Union General Assembly
    Presentation's date: 2007
    Presentation of work at congresses

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    3D downscaling model for radar-based precipitation fields  Open access

     Llort Pavon, Xavier; Berenguer Ferrer, Marc; Franco Lanao, Maria; Sanchez-Diezma Guijarro, Rafael; Sempere Torres, Daniel
    Meteorologische zeitschrift
    Vol. 15, num. 5, p. 505-512
    DOI: 10.1127/0941-2948/2006/0152
    Date of publication: 2006-10
    Journal article

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  • Analysis of the radar distance error structure through a simulation approach

     Llort Pavon, Xavier; Berenguer Ferrer, Marc; Sanchez-Diezma Guijarro, Rafael; Sempere Torres, Daniel
    European Conference on Radar in Meteorology and Hydrology
    p. 567-570
    Presentation's date: 2006-09
    Presentation of work at congresses

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  • Precipitation estimation by radar: introducing a probabilistic approach using ensembles : potential application to GPM validation

     Sempere Torres, Daniel; Berenguer Ferrer, Marc; Sanchez-Diezma Guijarro, Rafael; Llort Pavon, Xavier; Germann, Urs; Zawadzki, Isztar; Geoffrey, Pegram; Alan, Seed
    European Geosciences Union General Assembly
    p. 10092
    Presentation's date: 2006-04
    Presentation of work at congresses

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  • 3D radar data downscaling

     Llort Pavon, Xavier; Berenguer Ferrer, Marc; Franco Lanao, Maria; Sanchez-Diezma Guijarro, Rafael; Sempere Torres, Daniel
    Conference on Radar Meteorology
    p. 1
    Presentation's date: 2005-10
    Presentation of work at congresses

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  • Are Radar rainfall estimates ready for hydrologycal applications? Some reflections from the experience at Catalunya

     Sempere Torres, Daniel; Corral Alexandri, Carlos; Sanchez-Diezma Guijarro, Rafael; Berenguer Ferrer, Marc; Velasco Forero, Carlos Alfonso; Franco Lanao, Maria; Llort Pavon, Xavier; Pastor, J J
    European Conference on Radar in Meteorology and Hydrology
    p. 30
    Presentation of work at congresses

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  • Preparing GPM: A comparison of radar rainfall measurements in a simulation framework

     Llort Pavon, Xavier; Sanchez-Diezma Guijarro, Rafael; Sempere Torres, Daniel
    European Conference on Radar in Meteorology and Hydrology
    p. 34
    Presentation of work at congresses

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  • Validation of Multisensors precipitation fields and numerical modelling in Mediterranean test sites (VOLTAIRE)

     Sempere Torres, Daniel; Sánchez-Diezma Guijarro, Rafael; Llort Pavon, Xavier; Berenguer Ferrer, Marc
    Competitive project

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