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Descripción
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| Non-stationarity in flood series is generally assumed as result of changes in flood drivers, such as climate change, wildfires, volcanic eruptions, land-use changes, anthropogenic actions or relocation of gauging stations. Many studies to detect trends in flood series have been conducted recently, either at national or trans-national scales. In Spain, a study to detect flood trends at a national spatial scale has been presented recently, finding a generalised decreasing trend in floods. The largest available dataset of gauging stations in Spain where effects of dam regulation on flow regimes can be neglected was obtained. A multi-temporal analysis was conducted to identify given either starting or ending years that could lead to the detected significant trends. A flood-rich period in 1950-1970 seemed to lead to the generalised decreasing trends, as it is placed at the beginning of the flood series. However, this multi-temporal test cannot identify accurately flood-rich and flood-poor periods. A methodology to identify flood-rich and flood-poor periods that are statistically significant is developed, based on comparing the expected sampling variability of floods when stationarity is assumed with the observed variability of floods in a given record. The methodology is applied to the series of annual maximum floods, peaks over threshold and counts of annual occurrences in peaks over threshold series in the period 1942-2009. | |
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Internacional
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Si |
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Nombre congreso
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12th British Hydrological Society National Symposium: Challenging hydrological theory and practice |
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Tipo de participación
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960 |
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Lugar del congreso
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Birmingham (Reino Unido) |
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Revisores
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ISBN o ISSN
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DOI
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Fecha inicio congreso
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02/09/2014 |
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Fecha fin congreso
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04/09/2014 |
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