Two Mediterranean irrigation communities in front of water scarcity: A comparison using satellite image time series |
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| Institution: | 1. Hungarian Natural History Museum, Department of Botany, H-1476, Budapest, Pf. 222, Hungary;2. W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Kraków, Poland;3. University of Bucharest, Faculty of Geology and Geophysics, Laboratory of Palaeontology, 1, N. Bălcescu Ave., 010041, Bucharest, Romania;4. Jagiellonian University in Kraków, Botanical Garden, Kopernika 27, 31-501 Kraków, Poland;5. Geological and Geophysical Institute of Hungary, Geological and Geophysical Collections, 1143 Budapest, Stefánia út 14, Hungary;6. Eötvös Loránd University, Department of Palaeontology, 1117 Budapest, Pázmány Péter sétány 1/C, Hungary;7. Geological and Geophysical Institute of Hungary, Department of Data Management, 1145 Budapest, Columbus u. 17-23, Hungary;8. University of Debrecen, Department of Mineralogy and Geology, 4032 Debrecen, Egyetem tér 1, Hungary;1. CoastalVision, LLC, 215 Eustis Avenue, Newport, RI 02840, USA;2. SeaPlan, 89 South Street, Boston, MA 02111, USA;3. The Nature Conservancy, Eastern North America Division, USA;4. University of New Hampshire, Center for Coastal and Ocean Mapping/Joint Hydrographic Center, Jere A. Chase Ocean Engineering Lab, 24 Colovos Road, Durham, NH 03824, USA;5. Maine Coastal Program, 93 State House Station, Augusta, ME 04333, USA;1. College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, PR China;2. Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, PR China;3. Qingdao Master Biotech Co. Ltd., Qingdao 266300,PR China |
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| Abstract: | Although a number of studies have analysed the methods to monitor crop water needs, the integration of phenological dynamics and irrigation using water stored in reservoirs has received little attention. This study is an example of such analysis applied to two irrigation communities (IC) located in a Spanish Mediterranean area, one with less water resources than the other, which it was carried out between 2002 and 2008. These years comprised periods of water surplus and water scarcity including the 2007–2008 drought considered by the Catalan public water authority the worst since 1944. The dynamics of maize, alfalfa, fruit trees and poplars were analysed using greenness and wetness extracted from remote sensing data. A statistical analysis was applied in order to find out the relationship between crop wetness and stored water. Results show that the IC used two methods for water-saving: crop substitution, by decreasing the area of maize, and timing the crop cycle, delaying or advancing sowing depending on water availability. In conclusion although one IC is drier in rainfall terms than the other, a similar crop wetness status was detected and no difference was observed between periods of water scarcity and water surplus. |
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| Keywords: | Catalan Drought Decree Crop phenological dynamics Remote sensing images Stored water in reservoirs Wetness index |
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