Hydrological Variability from Gauging Stations and Simulated SWOT Data, for Major French Rivers
| العنوان: | Hydrological Variability from Gauging Stations and Simulated SWOT Data, for Major French Rivers |
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| المؤلفون: | B. Laignel, L. Chevalier, C. Lion, F. Lyard, I. Turki |
| المساهمون: | Morphodynamique Continentale et Côtière (M2C), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Centre National d'Études Spatiales [Toulouse] (CNES), University of North Carolina [Chapel Hill] (UNC), University of North Carolina System (UNC), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Journal of Geoscience and Environment Protection Journal of Geoscience and Environment Protection, 2017, 05 (13), pp.54-69. ⟨10.4236/gep.2017.513004⟩ Journal of Geoscience and Environment Protection, Scientific Research Publishing, 2017, 05 (13), pp.54-69. ⟨10.4236/gep.2017.513004⟩ |
| بيانات النشر: | Scientific Research Publishing, Inc., 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Watershed, Wavelet Analyses, 010504 meteorology & atmospheric sciences, 0208 environmental biotechnology, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, 02 engineering and technology, Hydrological Variability, 01 natural sciences, [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, SWOT analysis, 0105 earth and related environmental sciences, Hydrology, geography, geography.geographical_feature_category, Sampling (statistics), Estuary, SWOT, 020801 environmental engineering, Water level, Ocean surface topography, 13. Climate action, Environmental science, Discharge, Spatial variability, Surface water |
| الوصف: | International audience; This study was carried out under the aegis of the program Surface Water and Ocean Topography (SWOT) associated with the National Center of Space Studies (CNES). The future SWOT mission will offer new opportunities to survey the hydrodynamic in the rivers because it will provide data on the water level/ discharges with a high spatial resolution (oceans: 1 km, rivers: 100 m of width) and with a global cover. However, it is important to estimate the capacity of SWOT to reproduce the hydrodynamic phenomena in the estuaries and the temporal and the spatial variability of this dynamic. The aim of this paper is 1) to estimate the capacity of SWOT to reproduce the hydrological variability of watersheds, and 2) to validate the use of these data for other zone without hy-drometric station. Based on discharge measurements and simulated Surface Water and Ocean Topography (SWOT) data, we have investigated the hydrological variability of the main French rivers (Seine, Loire, Garonne and Rhône) by applying a series of statistical analyses to the time series of the discharge. A frequency analysis has been also used using a technique of wavelet. Results have shown a similar hydrological variability of the four watersheds. Three different periods of hydrologic variability has been identified: before 1970, between 1970 and 1990, and after 1990. Using these analyses, simulated SWOT samples and discharges were compared during the three studied periods. Simulated SWOT data, obtained by a synthetic sampling of river discharges basing on the number of measurements per repeat orbit, reproduce the hydrological variability of rivers. Such reproduction seems to be independent in the number of SWOT passages (from two to four), except for the minimum and maximum annual discharges where number of overpass seems to have an influence. These results were validated by coherence wavelet which underlines coherence higher than 90% How to cite this paper: Chevalier between simulated SWOT data and in-situ discharges. Nevertheless, good correlation was not observed for the minimum and the maximum annual discharge with an underestimation for SWOT maximum annual and an overestimation of the minimum annual SWOT ones. Moreover, best identification of minimum, mean and maximum annual discharge depends on SWOT overpasses. |
| تدمد: | 2327-4344 2327-4336 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef21f4496f2f41a380a0cc09fb0db6a3 https://doi.org/10.4236/gep.2017.513004 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....ef21f4496f2f41a380a0cc09fb0db6a3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 23274344 23274336 |
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