Drought, water level drop and effects of fires on soils in the Paraná delta, Argentina
Climate change affects the hydrological regimes of rivers. The water recession in times of drought negatively transform the wetlands. The structural and functional alteration that they produce in them mainly modifies the plant productivity and soils, and this is aggravated when fires occur. For the...
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| Autores principales: | , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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CURIHAM: Centro Universitario Rosario de Investigaciones Hidroambientales Facultad de Ciencias Exactas, Ingeniería y Agrimensura. Universidad Nacional de Rosario Director: Dr. Ing. Hernán Stenta Riobamba 245 bis, 2000 Rosario (Santa Fe), Argentina. Telefa
2023
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| Acceso en línea: | https://cuadernosdelcuriham.unr.edu.ar/index.php/CURIHAM/article/view/199 |
| Aporte de: |
| Sumario: | Climate change affects the hydrological regimes of rivers. The water recession in times of drought negatively transform the wetlands. The structural and functional alteration that they produce in them mainly modifies the plant productivity and soils, and this is aggravated when fires occur. For the years 2017, 2019, 2020 and 2022, the water coverage of the Upper Delta of the Paraná River was estimated through satellite images, and the effects on some edaphic properties caused by fires were evaluated in a sector of an island of the same wetland. The water cover was estimated using Sentinel 2 A/B satellite image mosaics. Geoprocessing tasks were performed on Google Earth Engine. The state of the soils was characterized in 18 positions that had different severities of burning. The combined effect of a pronounced drop in the river level with a very intense climatic drought strongly conditioned the surface covered by water in the wetland area. The fires had negative effects mainly on the soils of the sites with the highest burning severity in two chemical variables and in one physical-mechanical variable. If these environmental combinations are repeated, the wetland will riskily increase its ecosystem vulnerability. |
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