Flow regime patterns and their controlling factors in the Ebro basin (Spain)

Bejarano Carrión, María Dolores and Marchamalo Sacristán, Miguel and García de Jalón Lastra, Diego and Gonzalez del Tanago del Rio, Marta (2010). Flow regime patterns and their controlling factors in the Ebro basin (Spain). "Journal of Hydrology", v. 385 (n. 1-4); pp. 323-335. ISSN 0022-1694. https://doi.org/10.1016/j.jhydrol.2010.03.001.

Description

Title: Flow regime patterns and their controlling factors in the Ebro basin (Spain)
Author/s:
  • Bejarano Carrión, María Dolores
  • Marchamalo Sacristán, Miguel
  • García de Jalón Lastra, Diego
  • Gonzalez del Tanago del Rio, Marta
Item Type: Article
Título de Revista/Publicación: Journal of Hydrology
Date: May 2010
ISSN: 0022-1694
Volume: 385
Subjects:
Freetext Keywords: Flow regime, Reference conditions, Hydrologic alteration, Flow classification, Prediction, Fluvial restoration
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería y Morfología del Terreno
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Natural intra-annual flow fluctuations vary between rivers, being a determining factor for aquatic insects, fish and riparian communities which are adapted to the habitat conditions and different flows throughout the seasons. Moreover, restoration of seasonal flow patterns plays an important role in achieving good ecological status of rivers, through the preservation and/or recovery of components and processes of natural river ecosystems. In this work we: (a) classify fluvial segments in the Ebro basin (North-Eastern Spain) according to the intra-annual variability of flows under natural conditions using statistical cluster analysis of monthly mean flow data; (b) characterise the resulting flow typologies according to several ecologically important hydrological variables; (c) analyse the relationships between flow regimes of fluvial segments and physical variables from their catchments; and finally (d) predict the most probable natural flow regime using logistic models based on the most determinant physical characteristics. Fifteen natural flow typologies were described in the Ebro basin, which were characterised in terms of flow fluctuation through the year as well as timing, flow ratio and duration of the maximum and minimum flows. Precipitation, biogeography and geology of catchments showed the highest correlations with flow regimes. Basin size, mean elevation and slope were also correlated. The logistic model we developed had a prediction success of 72% in the Ebro basin. The definition of the natural hydrological conditions (to which the biological communities are tailored), even when flow data are not available, is an important support in the management of river ecosystems. It is especially suitable for setting goals in aquatic ecosystem conservation or restoration projects.

More information

Item ID: 8627
DC Identifier: http://oa.upm.es/8627/
OAI Identifier: oai:oa.upm.es:8627
DOI: 10.1016/j.jhydrol.2010.03.001
Official URL: http://www.sciencedirect.com/science/journal/00221694
Deposited by: Memoria Investigacion
Deposited on: 08 Aug 2011 10:32
Last Modified: 20 Apr 2016 17:20
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