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Aspectos biológicos y ecológicos de Mytilopsis sallei (Recluz, 1849) (Bivalvia: Dreissenidae) en bancos de ostra de la Ciénaga Grande de Santa Marta, Caribe colombiano 20
Puyana, Mónica.
Mytilopsis sallei es una especie que se encuentra ampliamente distribuida sobre sustratos duros en la Ciénaga Grande de Santa Marta, siendo particularmente abundante sobre bancos de ostra de mangle (Crassostrea rhizophorae), donde alcanza densidades de hasta 5000 indiv/m2. Aunque posee una amplia tolerancia a variaciones en la salinidad y temperatura, prefiere aquellos lugares donde la afluencia de aguas dulces es constante. Puede además tolerar aguas turbias con un alto contenido de sedimentos, como en la desembocadura de los ríos. M. sallei no parece aparentemente, competir con la ostra, incluso en aquellos bancos sometidos a intensa explotación. Esto se debe a las preferencias ambientales de cada especie y a la alta productividad de las aguas de la...
Tipo: Journal Contribution Palavras-chave: Ecology; Population structure; Salinity effects; Temperature effects; Density; Condition factor; Turbidity; Interspecific relationships; Population dynamics; Coastal lagoons; Estuaries; Ecology; Population structure; Turbidity; Estuaries; Density; Population dynamics; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_15043; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_2186; Http://aims.fao.org/aos/agrovoc/c_6111; Http://aims.fao.org/aos/agrovoc/c_1697.
Ano: 1995 URL: http://hdl.handle.net/1834/3802
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Beer Clarification with polysulfone membrane and study on fouling mechanism 52
Oliveira,Ricardo Cardoso de; Barros,Sueli Teresa Davantel de.
The aims of the present work were to study the relationship between the fluxes, permeate quality, and fouling mechanism. A polysulfone membrane with 100 KDa and 0.12 m² of surface area was used. Permeate fluxes were measured for different pressures (0.5, 1.0, 1.5, and 2.0 bar) at the same temperature of 8 ºC. The fluxes measured for each pressure ranged from 22, 24, 27 and 30 kg h-1m-2 at 0.5, 1.0, 1.5 and 2.0 bar, respectively. Samples of the feed and permeate were analyzed for pH, color, turbidity, sugar, bitterness, and proteins. The fouling mechanisms observed were cake filtration, partial pore blocking, and complete pore blocking.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microfiltration; Polymer Membrane; Pore Blocking; Turbidity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000600020
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Caractérisation et dynamique des turbidités en zone côtière : L'exemple de la région marine Bretagne Sud 5
Tessier, Caroline.
The space and time turbidity variability in Southern Brittany was studied, from the combination of results of hydrological campaigns, long-term instrumented moorings, satellite observations and 3D process-based numerical modelling. Previous observations exhibit a cross-shore concentration gradient with values hardly exceeding 30 mg/l beyond the littoral zone. Acoustic profilers (ADCP) were moored to measure currents, waves and the associated dynamics of fine particles. Time series of mass concentration in the whole water column were estimated from the analysis of the backscattered signal. During wave episodes, values can reach 100 mg/l at 1.50 m above bottom, just outside the Bay of Vilaine. The empirical calibration of the signal with independent...
Tipo: Text Palavras-chave: Southern Brittany; MARS 3D numerical model; Acoustic backscattering; Acoustic current profiler; Waves; Circulations; Turbidity; Bretagne Sud; Modèle numérique MARS 3D; Rétrodiffusion acoustique; Profileur acoustique de courant; Vagues; Circulations; Turbidité.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/these-2325.pdf
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Caracteristiques saisonnieres de l'hydrobiologie du complexe estuariende Marennes-Oleron (France). 5
Heral, Maurice; Razet, Daniel; Deslous-paoli, Jean-marc; Berthome, Jean-paul; Garnier, J..
Four seasonal compaigns providing a sampling of 15 stations each followed during half a tide cycle, i.e. 120 water samples permit the definition of the main hydrobiological features of Marennes-Oleron Bay: salinity and turbidity, phytoplanktonic biomasses, ATP concentrations. The authors suggest that a new way of adapted sampling to their objectives, will work out in the future by sampling during tidal cycles but as frequently as possible.
Tipo: Text Palavras-chave: Seasonal variations; Salinity; ATP; Estuaries; Turbidity; Hydrobiology; Salinity; Phytoplankton; Estuaries; Biomass; Hydrobiology; Physicochemical properties; Phytoplankton; Environmental conditions; Biomass.
Ano: 1982 URL: http://archimer.ifremer.fr/doc/1982/publication-1854.pdf
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Characterization of diesel degrading bacterial species from contaminated tropical ecosystem 52
Nwinyi,Obinna Chukwuemeka; Kanu,Ijeoma Akudo; Tunde,Ayano; Ajanaku,Kolawole Oluseyi.
The bacterial diversity in a diesel contaminated tropical soil was investigated using diesel oxidation in gradient cultures dynamics (pH and OD) of the pure cultures. The diesel dependent growths of these isolates were assessed for 15 days by monitoring the gradient fluxes in the pH and Optical density OD of the media. Results showed an increase in OD as well as fluctuations in pH values. The mean OD data obtained was 0.515- 1.187 with pH of 6.95-7.2. From the morphological and biochemical characterization and comparison with respect to the standard references, the isolates S1P1, S3P3, S2P2, S2P1,and S3P2 were presumably the members of the genera Bacillus, Pseudomonas and Mycobacterium species. From the study, it was apparent that the tropical ecosystems...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diesel; Optical density; Turbidity; Tropical Ecosystem; Bacterial strains; PH.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500789
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Circulation and suspended sediment transport in a coral reef lagoon: The south-west lagoon of New Caledonia 5
Ouillon, S.; Douillet, Pascal; Lefebvre, J. P.; Le Gendre, Romain; Jouon, Aymeric; Bonneton, P.; Fernandez,; Chevillon, C.; Magand, O.; Lefevre, J.; Le Hir, Pierre; Laganier, R.; Dumas, Franck; Marchesiello, P.; Madani, A. Bel; Andrefouet, S.; Panche, J. Y.; Fichez, R..
The south-west lagoon of New Caledonia is a wide semi-open coral reef lagoon bounded by an intertidal barrier reef and bisected by numerous deep inlets. This paper synthesizes findings from the 2000-2008 French National Program EC2CO-PNEC relative to the circulation and the transport of suspended particles in this lagoon. Numerical model development (hydrodynamic, fine suspended sediment transport, wind-wave, small-scale atmospheric circulation) allowed the determination of circulation patterns in the lagoon and the charting of residence time, the later of which has been recently used in a series of ecological studies. Topical studies based on field measurements permitted the parameterisation of wave set-up induced by the swell breaking on the reef barrier...
Tipo: Text Palavras-chave: Hydrodynamics; Suspended sediment; New Caledonia; Coral reef lagoon; Sediment; Turbidity; Resuspension.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00014/12526/9401.pdf
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Coccolith-derived turbidity and hydrological conditions in May in the Bay of Biscay 5
Perrot, Laurie; Gohin, Francis; Ruiz-pino, Diana; Lampert, Luis; Huret, Martin; Dessier, Aurelie; Malestroit, Pascale; Dupuy, Christine; Bourriau, Paul.
Coccolithophore blooms occur regularly from April to June in the Bay of Biscay where they have been observed for many years from ocean-colour imagery thanks to the ability of their calcite plates to scatter light. They are easily depicted on interpolated images of non-algal Suspended Particulate Matter (SPM) derived from satellite reflectance data in May, at the time of the PELGAS (PELagique GAScogne) annual surveys. Over the springs 2012 to 2015, the PELGAS surveys provided in-situ data on the turbidity throughout the water column and on the hydrological environment prevailing during the blooms in the vicinity of the continental shelf break. The satellite-derived SPM in the area of coccolithophore blooms was closely related to measured turbidity in the...
Tipo: Text Palavras-chave: Bay of Biscay; Ocean colour; Suspended particulate matter; Turbidity; Coccoliths; Stratification.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00416/52790/53689.pdf
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Corales, formaciones arrecifales y blanqueamiento de 1987 en Bahía Portete (Guajira, Colombia) 20
Solano-P., Oscar D..
Para el reconocimiento y caracterización de las formaciones arrecifales de Bahía Pórtete se visitaron un total de 22 estaciones entre junio de 1987 y enero de I988. Se registraron por primera vez Acropora cervicomis, Agaricia agaricites, Montastrea cavernosa, Diploría clivosa e Isophyllia sinuosa, elevando a 18 el número de especies de escleractinios de la bahía. El componente principal por su abundancia y diversidad de formas fue el hidrocoral Millepora alcicomis. Las formaciones arrecifales del área se concentran sobre los costados oeste y suroeste, sin llegar a constituirse en verdaderos arrecifes. Estructuralmente se discriminan dos tipos de formaciones: tipo 1 parches arrecifales y tipo 2 praderas de fanerógamas con colonias dispersas de M. alcicomis....
Tipo: Journal Contribution Palavras-chave: Bleaching; Ecology; Geographical distribution; Habitat; Population structure; Population dynamics; Turbidity; Density; Species diversity; Ecology; Geographical distribution; Population structure; Turbidity; Bleaching; Population dynamics; Density; Species diversity; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_15043; Http://aims.fao.org/aos/agrovoc/c_953; Http://aims.fao.org/aos/agrovoc/c_6111; Http://aims.fao.org/aos/agrovoc/c_2186; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 1994 URL: http://hdl.handle.net/1834/3782
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Dynamique des matières en suspensions minérales des eaux de surface de la Manche observée par satellite et modélisée numériquement. 5
Rivier, Aurelie.
Study of mineral suspended particulate matter (SPM) is essential to understand ecosystem dynamics. SPM influences light penetration which is closely related to primary production and carries pollutants and nutrients within the water masses. This work aims to study near-surface mineral SPM dynamics in the English Channel using two complementary methods: remote-sensing by satellites and numerical modelling. Firstly, MODIS and MERIS satellite images processed by the IFREMER semi-analytical algorithm and describing non-algal SPM, are analysed to build three statistical models which are able to estimate near-surface SPM using simple variables, e.g., tidal coefficient, significant wave height and mean chlorophyll-a concentration. Secondly, the three-dimensional...
Tipo: Text Palavras-chave: Matière en suspension; Télédétection; Satellite; Modélisation; Manche; Sédiments; Turbidité; Marée; Houle; Suspended particulate matter; Satellite; Remote-sensing; Modelling; English Channel; Sediments; Turbidity; Tide; Wave.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00157/26783/24884.pdf
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Ecophysiological deterministic model for Crassostrea gigas in an estuarine environment 5
Barille, Laurent; Heral, Maurice; Barilleboyer, Al.
An ecophysiological deterministic model of growth, reproduction and interactions between the bivalve and its estuarine environ ment was established for the Japanese oyster Crassostrea gigas. The environmental variables used in the model are: total particulate matter, particulate organic matter, particulate inorganic matter, chlorophyll, phaeopigments, proteins, lipids and carbohydrates. Rates of clearance, filtration, ingestion, absorption and respiration along with efficiencies of retention, selection and absorption are modelled with endogenous (dry weight of the animal, energy allocation between growth and reproduction) and exogenous variables (temperature, food quality and quantity). The model simulate the temporal evolution of two compartments: somatic...
Tipo: Text Palavras-chave: Crassoslrea gigas; Croissance; Écophysiologie; Modélisation; Turbidité; Crassostrea gigas; Ecophysiology; Growth; Modelling; Turbidity.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00038/14892/12219.pdf
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Effets de la surcharge en seston minéral sur les palourdes Japonaises adultes Ruditapes philippinarum 5
Daou, Rafik.
Negative effects of high turbidity, frequently seen at Marennes-Oleron bay in winter, on Manila clam Ruditapes philippinarum are experimentally studied with two samples during gametogenetic period may september 1987. Thes clams reared at high level of silt (178 mg/l) reduce their growth to about 32% the reproductive effort estimated by gameto-somatic weight index is reduced to 40 %. The high turbid ity is responsible of a twice mortality rate.
Tipo: Text Palavras-chave: Turbidité; Ruditapes philippinarum; Composition biochimique; Effort de reproduction; Mortalité; Turbidity; Ruditapes philippinarum; Biochemical evolution; Reproductive effort; Mortality.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/00430/54175/55516.pdf
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Effets de la turbidité sur les palourdes adultes Ruditapes philippinarum (Adams & Reeve) : croissance, mortalité, effort de reproduction, composition biochimique 5
Daou, Rafik; Goulletquer, Philippe.
Following observations on disparity in the growth of the Manila clam bred in the field, laboratory experiments were conducted to test the turbidity. This factor influenced the growth and mortality of Manila clam. The reproductive effort, growth and mortality of two populations were followed, one being cultivated in water with high levels on silt. A biochemical survey permitted the response to the effect of mineral particles to be estimated
Tipo: Text Palavras-chave: Mortality; Reproductive effort; Biochemical changes; Ruditapes philippinarum; Turbidity; Mortalité; Effort de reproduction; Composition biochimique; Ruditapes philippinarum; Turbidité.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/1988/publication-2876.pdf
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Esquemas de distribución de esponjas arrecifales (Porifera) del noroccidente del Golfo de Urabá, Caribe sur, Colombia 20
Valderrama, D.; Zea, S..
The North-West of Urabá Gulf in the Southern Caribbean supports a variety of coral reef zones in conditions of high turbulence and fluctuating turbidity and salinity. Sponge composition and density were surveyed and their relationship with physical and structural features of the reef zones were analyzed. In total, 65 demosponges and 1 calcareous sponge species were encountered along belt transects (20 m2) on 11 stations between 1 and 17 m in depth. Sponge density in Urabá tended to be higher than in other areas with water conditions optimal for coral reef development (i.e. Roncador, Serrana and Quitasueño remote oceanic atolls in the SW Caribbean, Colombia) due possibly to higher concentrations of organic suspended materials discharged from rivers....
Tipo: Journal Contribution Palavras-chave: Sponges; Distribution; Salinity; Turbidity; Distribution; Turbidity; Sponges; Salinity; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_15043; Http://aims.fao.org/aos/agrovoc/c_7321; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2003 URL: http://hdl.handle.net/1834/3070
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Estimating turbidity and total suspended matter in the Adour River plume (South Bay of Biscay) using MODIS 250-m imagery 5
Petus, Caroline; Chust, Guillem; Gohin, Francis; Doxaran, David; Froidefond, Jean-marie; Sagarminaga, Yolanda.
The Basque coastal waters (South Bay of Biscay) are directly influenced by the Adour River freshwater plume. The Adour outflow leads to important variations of suspended matter concentrations and turbidity, which in turn may affect biological productivity and water quality. This study aims at both developing specific algorithms and testing the efficiency of atmospherically corrected MODIS-Aqua 250-m surface reflectance product (MYD09) to map total suspended matter concentrations and turbidity within the Adour coastal region. First, regional empirical algorithms based on in-situ data were tested to retrieve the concentration of total suspended matter and turbidity from the remote sensing reflectance. Then, the respective sensitivity of MODIS surface...
Tipo: Text Palavras-chave: Adour River plume; Turbidity; Suspended matter; Satellite sensing; MODIS; Remote sensing reflectance.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00003/11383/8042.pdf
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Etude de la variation des paramètres biomasse (Chla) et turbidité sur plus de 10 années dans les eaux marines guyanaises par imagerie satellite. - Phase 2 : utilisation de la résolution à 300 m 5
Lampert, Luis; Bryere, Philippe; Gohin, Francis.
On the extremely turbid waters of French Guyana, the high-resolution satellite imagery (300 m) seems a very good tool for monitoring coastal and estuarine waters. It is possible to adjust the algorithms and calculation methods to be in the range of values suggested by in-situ measurements and thus, have the long data series, where P90chla and P90turbi parameters can be calculated on the MEC.
Tipo: Text Palavras-chave: Guyane française; Images satellite; Turbidité; Chlorophylle; P90; MEC; MET; DCE; French Guiana; Satellite imagery; Turbidity; Chlorophyll; P90; MEC; MET; DCE.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00369/47992/48020.pdf
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Etude des transports de matieres en suspension en Manche par l''emploi de l'imagerie CZCS 5
Thomas, Y.
The suspended matter distribution in Channel surface waters during 1981 have been obtained by the interpretation of radiometer recording (Coastal zone Color Scanner working on Nimbus 7 satellite). After imagery calibration and calculation of suspended matter concentration using algorithm from in situ measurements, the maps interpretation allows the study of: (1) resuspension of infratidal fluvial particles by swells and tides; (2) characterizing of intertidal zone given estuarine material by erosion; (3) determination of river plume limits with regard to Seine flow rate; (4) calculation and modeling of solid load; (5) estimation of suspended particles masses and volumes to strike the balance; (6) differentiation of hydrobiological behaviors in Western and...
Tipo: Text Palavras-chave: Turbidity; Coastal zone; Estuarine front; River plumes; Zonal distribution; Estuarine dynamics; Radiometers; Remote sensing; Suspended particulate matter; Particle motion.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1280.pdf
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Évaluation du descripteur 5 « Eutrophisation » en France métropolitaine. Rapport scientifique pour l’évaluation 2018 au titre de la DCSMM 5
Devreker, David; Lefebvre, Alain.
This report is the second assessment of French marine water eutrophication status (descriptor 5) done in the framework of the MSFD. The goal of this report is to determine if French marine water reach the Good Ecological State as defined by the MSFD. It stands next to the initial evaluation made in 2012, from which it is an update. It introduces the second cycle of the Marine Environment Action Program. It shows that French marine waters, behind the 12 nm line, reach the GES as defined by the MSFD. Problems link to eutrophication occurs in marine waters above the 12 nm, where 6.5% of the area do not reach the GES.
Tipo: Text Palavras-chave: DCSMM; Eutrophisation; Évaluation; Bon Etat Ecologique; Seuils; Indicateurs; Nutriments; Chlorophylle-a; Oxygène; Turbidité; Macroalgues; Pressions écologiques; MSFD; Eutrophication; Assessment; Good Environmental Status; Thresholds; Indicators; Nutrients; Chlorophyll-a; Oxygen; Turbidity; Macroalgae; Ecological pressures..
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00437/54868/56361.pdf
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First Comprehensive Quantitative Multi-Parameter Assessment of the Eutrophication Status from Coastal to Marine French Waters in the English Channel, the Celtic Sea, the Bay of Biscay, and the Mediterranean Sea 5
Lefebvre, Alain; Devreker, David.
The first quantitative and comprehensive assessment of the eutrophication status from coastal to offshore French waters was performed within the Marine Strategy Framework Directive (MSFD descriptor 5) for the English Channel, the southern bight of the North Sea, the Celtic Seas, the Bay of Biscay and the Western Mediterranean Sea. Based on a combination of different data sources (in situ, satellite, and modeling products), a fully-integrated dataset was generated over the period 2010–2016. Using the best available knowledge on the eutrophication process and definition, the assessment procedure was implemented considering nutrient pressures, and direct and indirect effects of excessive inputs. The different steps of the assessment were: (i) Establishment of...
Tipo: Text Palavras-chave: Eutrophication; Assessment; Marine Strategy Framework Directive (MSFD); Water Framework Directive (WFD); Oslo and Paris Convention (OSPAR); English Channel; Celtic Seas; Bay of Biscay; Mediterranean Sea; Nutrients; Chlorophyll; Oxygen; Turbidity; Phytoplankton; Macro-algae.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00641/75350/76083.pdf
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Freshwater parameters in the state of Rio Grande do Sul, southern Brazil, and their influence on fish distribution and aquaculture 83
Souza,Carine de F.; Pereira Junior,Waterloo; Garcia,Luciano de O.; Santos,Felipe C. dos; Baldisserotto,Bernardo.
ABSTRACT This study analyzed the relationship between several water quality parameters (pH, hardness, alkalinity, turbidity, iron and manganese) levels measured over a 16 year period with fish distribution and aquaculture in the state of Rio Grande do Sul, Southern Brazil. The mean pH values were within a neutral range (6.5-7.5), but the maximum and minimum values reached inappropriate levels for fish farming in some cities. Alkalinity levels were very low (except in the southwest region of the state), which may have contributed to pH variation. Hardness, turbidity, iron (except the region near Caçapava do Sul City) and manganese were within safe ranges for fish farming; however, turbidity levels occasionally increased to levels outside the safe range. In...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alkalinity; Hardness; Iron; PH; Turbidity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300205
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Full-Waveform LiDAR Fast Analysis of a Moderately Turbid Bay in Western France 5
Launeau, Patrick; Giraud, Manuel; Robin, Marc; Baltzer, Agnes.
In shoreline monitoring, only topo-bathymetric light detection and ranging (LiDAR) can map large corridors from aerial dunes to sandbanks in shallow water. Increasing turbidity masking the formation of 532 nm laser beam echoes on the sea bed makes this challenging. Full-waveform recording all the laser beam damping functions, a turbid water column can be seen as an accumulation of layers forming a single continuum and a distinction can be made between signals ending at the bottom down to a depth of 10 m. In practice full-waveforms are converted by laser beam tracing an image cube with a grid of 1-m-wide pixels and a 0.15 m range resolution storing the mean intensities returned along incident angle. The first derivative of a wide Gaussian filter serves to...
Tipo: Text Palavras-chave: Full-waveform; Airborne LiDAR; Bathymetry; Shoreline monitoring; Turbidity.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00476/58745/61270.pdf
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