English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/46982
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Hydroperiod of Doñana marshes: natural or anthropic origin of inundation regime?

AuthorsDíaz-Delgado, Ricardo ; Bustamante, Javier ; Pacios, Fernando ; Aragonés, David
Issue Date2006
PublisherEuropean Space Agency
CitationProceedings of the 1st GlobWetland Symposium. 2006.
AbstractThere is a major concern on current restoration and management programmes being applied over Doñana Ramsar Site. Historical inundation regime has been largely changed according to human transformations. On site measurements along short and recent periods have provided scant local information on inundation variability. Historical inundation patterns on a spatial basis are necessary to understand short and long time effects of human transformations on natural regimes. By compiling a long time series of Landsat MSS, TM and ETM images (1975-2006) we have mapped inundation levels for every available scene over Doñana wetlands. After coregistration, radiometric correction and time series normalization, we applied the best semiautomathic method for discriminating inundation levels according to ground-truth data. Then, we reconstructed for each hydrological cycle the hydroperiod value for every pixel. The value is calculated as the minimum number of days detected as flooded for the available dates during every cycle. Results reveal a significant increase on the average number of days inundated for the whole marsh and local hydroperiod changes related to human transformations and rainfall variability. Hydroperiod maps are therefore helping to understand hydrological implications of future management decisions.
Appears in Collections:(EBD) Libros y partes de libros
Files in This Item:
File Description SizeFormat 
congreso 2006.doc389 kBMicrosoft WordView/Open
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.