GIUV2013-089
The study of floods in watercourses is one of the key pillars for understanding flood risk in Mediterranean environments. These are small basins, with ephemeral circulation, whose configuration is determined by a few high-energy events, where certain hydrogeomorphological thresholds are exceeded, which cause the greatest changes in the fluvial system and the main dangers for man. Establishing the risk pattern of these basins implies knowing from which rainfall thresholds (quantity, intensity and spatial distribution) surface runoff occurs, and which flow thresholds generate the main problems in the floodplain. Our group is dedicated to estimating these hydrogeomorphological thresholds, based on the detailed study of extreme events. The analysis contemplated three scales of work: a) a general scale, which encompasses the territory assigned to the Júcar Hydrographic Confederation (43. 000 km2), where precipitation thresholds are addressed in relation to the synoptic situation, relief and sea temperature; b) a basin scale (pilot basins of Carraixet, Poyo, La Rambla de la Castellana, Rambla de Gallinera and Riu Vernissa), where runoff production thresholds are studied, in relation to...The study of floods in watercourses is one of the key pillars for understanding flood risk in Mediterranean environments. These are small basins, with ephemeral circulation, whose configuration is determined by a few high-energy events, where certain hydrogeomorphological thresholds are exceeded, which cause the greatest changes in the fluvial system and the main dangers for man. Establishing the risk pattern of these basins implies knowing from which rainfall thresholds (quantity, intensity and spatial distribution) surface runoff occurs, and which flow thresholds generate the main problems in the floodplain. Our group is dedicated to estimating these hydrogeomorphological thresholds, based on the detailed study of extreme events. The analysis contemplated three scales of work: a) a general scale, which encompasses the territory assigned to the Júcar Hydrographic Confederation (43. 000 km2), where precipitation thresholds are addressed in relation to the synoptic situation, relief and sea temperature; b) a basin scale (pilot basins of Carraixet, Poyo, La Rambla de la Castellana, Rambla de Gallinera and Riu Vernissa), where runoff production thresholds are studied, in relation to the hydrogeomorphological configuration and land uses; c) a more detailed scale (pilot basins of Carraixet, Poyo, La Rambla de la Castellana, Rambla de Gallinera and Riu Vernissa), where runoff production thresholds are studied in relation to the hydrogeomorphological configuration and land uses; and c) a more detailed, flood plain scale, where risk levels are analysed in relation to overflow, natural hazard and vulnerability thresholds. The study of specific episodes is based on data from the SAIH-Júcar (Automatic Hydrological Information System), since 1989. Based on this data, a system for storing and filtering the information has been developed that allows working on different time scales, from five minutes to the annual scale. With these records, rainfall episodes are defined and characterised with indicators of accumulated rainfall, intensity, duration, torrential rainfall, irregularity and persistence. The behaviour of extreme rainfall is analysed for different time scales of observation (5', 15', 30', 1 h, 2h, 3h, 4h, 6h, 12 h and 24h) and its spatial distribution in the territory of the CHJ. The maxima are studied in relation to the geographical factors of altitude, orientation and distance from the sea. Risk patterns are also studied in terms of hazard and vulnerability factors of the population, taking into account their spatial distribution and according to the characteristics of spatial occupation, in terms of temporal patterns (days, nights, working hours and public holidays). All the information is crossed with the data provided by the Civil Protection Services and the Insurance Compensation Consortium in order to obtain relationships between the rainfall indicators and the categories of damage caused by the episodes. This joint study allows us to evaluate the degree of adequacy of the rainfall thresholds in force in the National Plan for the Prediction and Monitoring of Adverse Phenomena, METEOALERTA. In addition, thanks to a research agreement with the Valencian Agency for Security and Emergency Response, intense episodes are analysed in relation to the calls to 1.1.2 CV (with special attention to on-site rainfall). On the other hand, the Integrated Flood Danger Map of the Valencian Community (MIPICOVA) has been drawn up based on the integration of the official cartography of the Territorial Flood Risk Plan of the Valencian Community (PATRICOVA) and the National Flood Zone Mapping System (SNCZI). Flood risk in wadis is currently being assessed in the context of climate change (considering new trends in precipitation inputs to Mediterranean systems and response hydrographs).
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- Definicion de criterios de deteccion y seleccion de episodios de lluvia, en base a los datos del SAIH.
- Creacion de una base de datos de los episodios
- Identificacion, caracterizacion y comparacion de patrones de comportamiento lluvia, a diferentes escalas temporales
- Distribucion espacial de los episodios en relacion con los factores geneticos (meteorologia, cercania del mar y topografia)
- Estudio hidrogeomorfologico de las cuencas piloto. Deteccion y cartografia de las zonas de riesgo
- Deteccion de umbrales e indicadores de lluvia de apoyo a la gestion del riesgo y del recurso
- Evaluacion, analisis y diagnostico de los episodios de lluvias intensas e inundaciones ocurridos desde la implantacion del telefono unico 1·1·2 Comunitat Valenciana. Elaboracion de cartografia de relacionando intensidades pluviometricas con entradas de incidentes a traves del telefono 1·1·2
- Estudio de los problemas producidos por las lluvias in situ
- Generacion de cartografia de riesgo unificada a partir de las cartografias oficiales. Elaboracion del Mapa integrado de Peligro de Inundacion en la Comunidad Valenciana (MIPICOVA) a partir del PATRICOVA y del SNCZI
- Estudio de episodios de crecida en ramblas en el actual contexto de cambio climatico
- Mediterranean Hydrology in the Context of Climate Change.The particularities of Mediterranean hydrology are studied, with special attention to the functioning of watercourses and gullies, in the current context of climate change.
- Flood risk.Analysis of flood risk at different scales, with particular attention to those produced by Mediterranean fluvial systems. Hazard, vulnerability and risk mapping.
- Study of heavy rainfall events. Trends of change: from resource to risk..Study of torrential rainfall episodes, at different time scales. The episodes are studied in relation to the genetic factors that have produced them, as well as in relation to the intensification factors and their consequences, in hydrological terms. The trends of change that seem to point towards a decrease in the resource and an increase in risk are studied.
| Name | Nature of participation | Entity | Description |
|---|---|---|---|
| ANA CAMARASA BELMONTE | Director | Universitat de València | |
| Research team | |||
| GHALEB FANSA SALEH | Member | Universitat de València | |
| JOSE JAVIER SERRANO LARA | Member | Universitat de València | |
| MARIA DOLORES PITARCH GARRIDO | Collaborator | Universitat de València | |
| MARIA PAZ CABALLERO LOPEZ | Collaborator | Universitat de València - Estudi General | UVEG PhD student |
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- Geography
- Watercourses, Gullies, semi-arid systems, climate change
- Vulnerability, hazard, flood risk
- Intensidad de lluvia, episodio de lluvia, torrencialidad, cambio climático
