Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS

Flood simulation studies use spatial-temporal rainfall data input into distributed hydrological models. A correct description of rainfall in space and in time contributes to improvements on hydrological modelling and design. This work is focused on the analysis of 2-D convective structures (rain cel...

Descripción completa

Detalles Bibliográficos
Autores: Barnolas, M., Rigo, Tomeu, Llasat Botija, María del Carmen
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/47611
Acceso en línea:https://hdl.handle.net/2445/47611
Access Level:acceso abierto
Palabra clave:Hidrologia
Inundacions
Radar
Precipitacions (Meteorologia)
Sistemes d'informació geogràfica
Catalunya
Hydrology
Floods
Precipitations (Meteorology)
Geographic information systems
Catalonia
id ES_c944347dd0a3e819976dc64d5bc656f6
oai_identifier_str oai:diposit.ub.edu:2445/47611
network_acronym_str ES
network_name_str España
repository_id_str
spelling Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GISBarnolas, M.Rigo, TomeuLlasat Botija, María del CarmenHidrologiaInundacionsRadarPrecipitacions (Meteorologia)Sistemes d'informació geogràficaCatalunyaHydrologyFloodsRadarPrecipitations (Meteorology)Geographic information systemsCataloniaFlood simulation studies use spatial-temporal rainfall data input into distributed hydrological models. A correct description of rainfall in space and in time contributes to improvements on hydrological modelling and design. This work is focused on the analysis of 2-D convective structures (rain cells), whose contribution is especially significant in most flood events. The objective of this paper is to provide statistical descriptors and distribution functions for convective structure characteristics of precipitation systems producing floods in Catalonia (NE Spain). To achieve this purpose heavy rainfall events recorded between 1996 and 2000 have been analysed. By means of weather radar, and applying 2-D radar algorithms a distinction between convective and stratiform precipitation is made. These data are introduced and analyzed with a GIS. In a first step different groups of connected pixels with convective precipitation are identified. Only convective structures with an area greater than 32 km2 are selected. Then, geometric characteristics (area, perimeter, orientation and dimensions of the ellipse), and rainfall statistics (maximum, mean, minimum, range, standard deviation, and sum) of these structures are obtained and stored in a database. Finally, descriptive statistics for selected characteristics are calculated and statistical distributions are fitted to the observed frequency distributions. Statistical analyses reveal that the Generalized Pareto distribution for the area and the Generalized Extreme Value distribution for the perimeter, dimensions, orientation and mean areal precipitation are the statistical distributions that best fit the observed ones of these parameters. The statistical descriptors and the probability distribution functions obtained are of direct use as an input in spatial rainfall generators.European Geosciences Union (EGU)2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/47611Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://dx.doi.org/10.5194/hess-14-129-2010Hydrology and Earth System Sciences, 2010, vol. 14, p. 129-139http://dx.doi.org/10.5194/hess-14-129-2010cc-by (c) Barnolas, M. et al., 2010http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/476112025-07-25T16:43:42Z
dc.title.none.fl_str_mv Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS
title Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS
spellingShingle Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS
Barnolas, M.
Hidrologia
Inundacions
Radar
Precipitacions (Meteorologia)
Sistemes d'informació geogràfica
Catalunya
Hydrology
Floods
Radar
Precipitations (Meteorology)
Geographic information systems
Catalonia
title_short Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS
title_full Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS
title_fullStr Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS
title_full_unstemmed Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS
title_sort Characteristics of 2D convective structures in Catalonia (NE Spain): an analysis using radar data and GIS
dc.creator.none.fl_str_mv Barnolas, M.
Rigo, Tomeu
Llasat Botija, María del Carmen
author Barnolas, M.
author_facet Barnolas, M.
Rigo, Tomeu
Llasat Botija, María del Carmen
author_role author
author2 Rigo, Tomeu
Llasat Botija, María del Carmen
author2_role author
author
dc.subject.none.fl_str_mv Hidrologia
Inundacions
Radar
Precipitacions (Meteorologia)
Sistemes d'informació geogràfica
Catalunya
Hydrology
Floods
Radar
Precipitations (Meteorology)
Geographic information systems
Catalonia
topic Hidrologia
Inundacions
Radar
Precipitacions (Meteorologia)
Sistemes d'informació geogràfica
Catalunya
Hydrology
Floods
Radar
Precipitations (Meteorology)
Geographic information systems
Catalonia
description Flood simulation studies use spatial-temporal rainfall data input into distributed hydrological models. A correct description of rainfall in space and in time contributes to improvements on hydrological modelling and design. This work is focused on the analysis of 2-D convective structures (rain cells), whose contribution is especially significant in most flood events. The objective of this paper is to provide statistical descriptors and distribution functions for convective structure characteristics of precipitation systems producing floods in Catalonia (NE Spain). To achieve this purpose heavy rainfall events recorded between 1996 and 2000 have been analysed. By means of weather radar, and applying 2-D radar algorithms a distinction between convective and stratiform precipitation is made. These data are introduced and analyzed with a GIS. In a first step different groups of connected pixels with convective precipitation are identified. Only convective structures with an area greater than 32 km2 are selected. Then, geometric characteristics (area, perimeter, orientation and dimensions of the ellipse), and rainfall statistics (maximum, mean, minimum, range, standard deviation, and sum) of these structures are obtained and stored in a database. Finally, descriptive statistics for selected characteristics are calculated and statistical distributions are fitted to the observed frequency distributions. Statistical analyses reveal that the Generalized Pareto distribution for the area and the Generalized Extreme Value distribution for the perimeter, dimensions, orientation and mean areal precipitation are the statistical distributions that best fit the observed ones of these parameters. The statistical descriptors and the probability distribution functions obtained are of direct use as an input in spatial rainfall generators.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/47611
url https://hdl.handle.net/2445/47611
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.5194/hess-14-129-2010
Hydrology and Earth System Sciences, 2010, vol. 14, p. 129-139
http://dx.doi.org/10.5194/hess-14-129-2010
dc.rights.none.fl_str_mv cc-by (c) Barnolas, M. et al., 2010
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Barnolas, M. et al., 2010
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv European Geosciences Union (EGU)
publisher.none.fl_str_mv European Geosciences Union (EGU)
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1844155958112026624
score 15.638193

Similares en LA Referencia