Search results for " Water surface"

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Monitoring Water Surface and Level of a Reservoir Using Different Remote Sensing Approaches and Comparison with Dam Displacements Evaluated via GNSS

2018

Remote sensing allowed monitoring the reservoir water level by estimating its surface extension. Surface extension has been estimated using different approaches, employing both optical (Landsat 5 TM, Landsat 7 ETM+ SLC-Off, Landsat 8 OLI-TIRS and ASTER images) and Synthetic Aperture Radar (SAR) images (Cosmo SkyMed and TerraSAR-X). Images were characterized by different acquisition modes, geometric and spectral resolutions, allowing the evaluation of alternative and/or complementary techniques. For each kind of image, two techniques have been tested: The first based on an unsupervised classification and suitable to automate the process, the second based on visual matching with contour lines…

Synthetic aperture radarwater surface010504 meteorology & atmospheric sciencesScience0211 other engineering and technologies02 engineering and technology01 natural sciencesDisplacement (vector)Advanced Spaceborne Thermal Emission and Reflection RadiometerMoving averagedam displacements; water level; water surface; hysteresis; optical remote sensing; SAR; GNSSRange (statistics)021101 geological & geomatics engineering0105 earth and related environmental sciencesRemote sensingdam displacementsGNSSSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaQwater leveloptical remote sensingWater levelhysteresisGNSS applicationsContour lineGeneral Earth and Planetary SciencesSettore ICAR/06 - Topografia E CartografiaGeologyDam displacements GNSS Hysteresis Optical remote sensing SAR Water level Water surfaceSARRemote Sensing

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