Search results for " Water level"

showing 4 items of 4 documents

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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Model predictive control for drum water level of boiler systems

2014

EngineeringDrum Water LevelInformation Systems and Managementbusiness.industryBoiler (power generation)DrumLinear-quadratic-Gaussian controlWater levelNonlinear systemModel predictive controlControl theoryControl and Systems EngineeringbusinessNon-linear SystemsDrum Water Level; Model Predictive Control; Non-linear Systems; Information Systems and Management; Control and Systems EngineeringModel Predictive Control
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Effect of water level and climatic factors on the radial growth of black alder

2011

Effect of water level and climatic factors on the radial growth of black alder Black alder (Alnus glutinosa (L.) Gaertn.) is a widespread tree species in Europe and the western part of the temperate climate zone. The area of forest in Latvia dominated by this tree species has substantially decreased due to wide-spread forest drainage. To predict future changes due to environmental change, it is extremely important to understand the function of ecosystems with black alder and their dynamics. Tree rings can be used as a proxy of past environmental factors. The aim of the study was to determine the effects of meteorological and hydrological factors on radial growth of black alder at two study …

MultidisciplinaryEnvironmental changebiologyWater tableEcologyScienceriver water levelQDendroclimatologybiology.organism_classificationAlderWater leveltree ringsAlnus glutinosaGeographyTemperate climateEcosystemdendroclimatologyblack alderProceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.
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Reservoir monitoring using satellite SAR and GNSS: a case study in southern Italy

2018

Recently, it has been demonstrated that it is possible to relate water levels of a reservoir with its dam displacements. Water levels were determined via remote sensing, while dam displacements were measured via Global Navigation Satellite System (GNSS). Results have shown that displacements and water levels are correlated.Water levels at the Magazzolo reservoir in southern Italy were firstly retrieved using two remote sensing approaches: by visual matching between the reservoir shoreline and contour lines, and by evaluating the surface extent via unsupervised classification to estimate the water levels with an area/depth relation. Dam displacements were measured using GPS receivers on the …

Reservoir monitoringGNSS applicationsSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaEnvironmental scienceSatellitedam displacements GNSS Interferometry remote sensing SAR water levelSettore ICAR/06 - Topografia E CartografiaRemote sensing
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