Relevant bibliographies by topics / HYBAM

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Academic literature on the topic 'HYBAM'

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Published: 3 July 2021
Last updated: 17 February 2022

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Journal articles on the topic "HYBAM"

1

Guimberteau, M., G. Drapeau, J. Ronchail, B. Sultan, J. Polcher, J. M. Martinez, C. Prigent, et al. "Discharge simulation in the sub-basins of the Amazon using ORCHIDEE forced by new datasets." Hydrology and Earth System Sciences 16, no. 3 (March 22, 2012): 911–35. http://dx.doi.org/10.5194/hess-16-911-2012.

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Abstract. The aim of this study is to evaluate the ability of the ORCHIDEE land surface model to simulate streamflows over each sub-basin of the Amazon River basin. For this purpose, simulations are performed with a routing module including the influence of floodplains and swamps on river discharge and validated against on-site hydrological measurements collected within the HYBAM observatory over the 1980–2000 period. When forced by the NCC global meteorological dataset, the initial version of ORCHIDEE shows discrepancies with ORE HYBAM measurements with underestimation by 15% of the annual mean streamflow at Óbidos hydrological station. Consequently, several improvements are incrementally added to the initial simulation in order to reduce those discrepancies. First, values of NCC precipitation are substituted by ORE HYBAM daily in-situ rainfall observations from the meteorological services of Amazonian countries, interpolated over the basin. It highly improves the simulated streamflow over the northern and western parts of the basin, whereas streamflow over southern regions becomes overestimated, probably due to the extension of rainy spots that may be exaggerated by our interpolation method, or to an underestimation of simulated evapotranspiration when compared to flux tower measurements. Second, the initial map of maximal fractions of floodplains and swamps which largely underestimates floodplains areas over the main stem of the Amazon River and over the region of Llanos de Moxos in Bolivia, is substituted by a new one with a better agreement with different estimates over the basin. Simulated monthly water height is consequently better represented in ORCHIDEE when compared to Topex/Poseidon measurements over the main stem of the Amazon. Finally, a calibration of the time constant of the floodplain reservoir is performed to adjust the mean simulated seasonal peak flow at Óbidos in agreement with the observations.
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Guimberteau, M., G. Drapeau, J. Ronchail, B. Sultan, J. Polcher, J. M. Martinez, C. Prigent, et al. "Discharge simulation in the sub-basins of the Amazon using ORCHIDEE forced by new datasets." Hydrology and Earth System Sciences Discussions 8, no. 6 (December 15, 2011): 11171–232. http://dx.doi.org/10.5194/hessd-8-11171-2011.

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Abstract. The aim of this study is to evaluate the ability of the ORCHIDEE land surface model to simulate streamflows over each sub-basin of the Amazon River basin. For this purpose, simulations are performed with a routing module including the influence of floodplains and swamps on river discharge and validated against on-site hydrological measurements collected within the HYBAM observatory over the 1980–2000 period. When forced by the NCC global meteorological dataset, the initial version of ORCHIDEE shows discrepancies with HYBAM measurements with underestimation by 15% of the annual mean streamflow at Óbidos hydrological station. Consequently, several improvements are incrementally added to the initial simulation in order to reduce those discrepancies. First, values of NCC precipitation are substituted by HYBAM daily in-situ rainfall observations from the meteorological services of Amazonian countries, interpolated over the basin. It highly improves the simulated streamflow over the northern and western parts of the basin, whereas streamflow over southern regions becomes overestimated, probably due to the extension of rainy spots that may be exaggerated by our interpolation method, or to an underestimation of simulated evapotranspiration when compared to flux tower measurements. Second, the initial map of maximal fractions of floodplains and swamps which largely underestimates floodplains areas over the main stem of the Amazon River and over the region of Llanos de Moxos in Bolivia, is substituted by a new one with a better agreement with different estimates over the basin. Simulated monthly water height is consequently better represented in ORCHIDEE when compared to Topex/Poseidon measurements over the main stem of the Amazon. Finally, a calibration of the time constant of the floodplain reservoir is performed to adjust the mean simulated seasonal peak flow at Óbidos in agreement with the observations.
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Getirana, Augusto C. V., Emanuel Dutra, Matthieu Guimberteau, Jonghun Kam, Hong-Yi Li, Bertrand Decharme, Zhengqiu Zhang, et al. "Water Balance in the Amazon Basin from a Land Surface Model Ensemble." Journal of Hydrometeorology 15, no. 6 (December 1, 2014): 2586–614. http://dx.doi.org/10.1175/jhm-d-14-0068.1.

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Abstract Despite recent advances in land surface modeling and remote sensing, estimates of the global water budget are still fairly uncertain. This study aims to evaluate the water budget of the Amazon basin based on several state-of-the-art land surface model (LSM) outputs. Water budget variables (terrestrial water storage TWS, evapotranspiration ET, surface runoff R, and base flow B) are evaluated at the basin scale using both remote sensing and in situ data. Meteorological forcings at a 3-hourly time step and 1° spatial resolution were used to run 14 LSMs. Precipitation datasets that have been rescaled to match monthly Global Precipitation Climatology Project (GPCP) and Global Precipitation Climatology Centre (GPCC) datasets and the daily Hydrologie du Bassin de l’Amazone (HYBAM) dataset were used to perform three experiments. The Hydrological Modeling and Analysis Platform (HyMAP) river routing scheme was forced with R and B and simulated discharges are compared against observations at 165 gauges. Simulated ET and TWS are compared against FLUXNET and MOD16A2 evapotranspiration datasets and Gravity Recovery and Climate Experiment (GRACE) TWS estimates in two subcatchments of main tributaries (Madeira and Negro Rivers). At the basin scale, simulated ET ranges from 2.39 to 3.26 mm day−1 and a low spatial correlation between ET and precipitation indicates that evapotranspiration does not depend on water availability over most of the basin. Results also show that other simulated water budget components vary significantly as a function of both the LSM and precipitation dataset, but simulated TWS generally agrees with GRACE estimates at the basin scale. The best water budget simulations resulted from experiments using HYBAM, mostly explained by a denser rainfall gauge network and the rescaling at a finer temporal scale.
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Santini, W., J. M. Martinez, R. Espinoza-Villar, G. Cochonneau, P. Vauchel, J. S. Moquet, P. Baby, et al. "Sediment budget in the Ucayali River basin, an Andean tributary of the Amazon River." Proceedings of the International Association of Hydrological Sciences 367 (March 3, 2015): 320–25. http://dx.doi.org/10.5194/piahs-367-320-2015.

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Abstract. Formation of mountain ranges results from complex coupling between lithospheric deformation, mechanisms linked to subduction and surface processes: weathering, erosion, and climate. Today, erosion of the eastern Andean cordillera and sub-Andean foothills supplies over 99% of the sediment load passing through the Amazon Basin. Denudation rates in the upper Ucayali basin are rapid, favoured by a marked seasonality in this region and extreme precipitation cells above sedimentary strata, uplifted during Neogene times by a still active sub-Andean tectonic thrust. Around 40% of those sediments are trapped in the Ucayali retro-foreland basin system. Recent advances in remote sensing for Amazonian large rivers now allow us to complete the ground hydrological data. In this work, we propose a first estimation of the erosion and sedimentation budget of the Ucayali River catchment, based on spatial and conventional HYBAM Observatory network.
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SOUZA, Renata Silva, José Mauro Sousa MOURA, Rodrigo da SILVA, Robert Max Holmes, Bernhard PEUCKER-EHRENBRINK, Robert G. M. SPENCER, and Wildson Silva de SOUSA. "APORTE DE CARBONO ORGÂNICO EM DIFERENTES PERÍODOS HIDROLÓGICOS NO RIO TAPAJÓS (PA), AMAZÔNIA, BRASIL." Geosciences = Geociências 38, no. 1 (April 6, 2019): 221–28. http://dx.doi.org/10.5016/geociencias.v38i1.13298.

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O rio Tapajós é um afluente de águas claras da margem direita do rio Amazonas, drenando uma área de 492.263 km2 da região central do Brasil para a porção central do estado do Pará. O objetivo deste estudo é determinar as concentrações de carbono orgânico (COP e COD) transportados no rio Tapajós em Itaituba/PA, avaliando a influência da vazão e as mudanças hidrológicas sazonais. Amostras mensais de água de superfície foram coletadas em 2016 e os parâmetros biogeoquímicos (pH, condutividade elétrica, oxigênio dissolvido e temperatura) foram medidos in locu. Os valores de sedimento foram analisados através de testes estatísticos em relação aos dados hidrológicos (precipitação, cota e vazão) fornecidos pelo INMET e banco de dados HyBam. A média anual de COP foi 14,35±10,0 mg L-1, com média de 20,8 mg L-1 na cheia e de 7,9 mg L-1 na seca. O COD teve média anual de 3,8±2,18 mg L-1, com média de 4,97 mg L-1 na cheia e de 2,32 mg L-1 seca,. Nossos resultados sugerem que as mudanças hidrológicas sazonais são a principal causa das mudanças nos sedimentos transportados no rio Tapajós, com possíveis associações às atividades de mineração e outras ações antrópicas ao longo de seus afluentes.
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SÁNCHEZ, Liz Stefanny Hidalgo, Adriana Maria Coimbra HORBE, Jean-Sébastien MOQUET, Francis SONDAG, and Jean-Loup GUYOT. "Spatial-temporal variation of dissolved inorganic material in the Amazon basin." Acta Amazonica 45, no. 2 (June 2015): 175–86. http://dx.doi.org/10.1590/1809-4392201402722.

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The Amazon River basin is important in the contribution of dissolved material to oceans (4% worldwide). The aim of this work was to study the spatial and the temporal variability of dissolved inorganic materials in the main rivers of the Amazon basin. Data from 2003 to 2011 from six gauging stations of the ORE-HYBAM localized in Solimões, Purus, Madeira and Amazon rivers were used for this study. The concentrations of Ca2+, Na+, K+, Mg2+, Cl-, SO4 -2, HCO3 - and SiO2 were analyzed. At the stations of Solimões and Amazon rivers, the concentrations of Ca2+, Mg2+, HCO3 - and SO4 -2 had heterogeneous distribution over the years and did not show seasonality. At the stations of Madeira river, the concentration of these ions had seasonality inversely proportional to water discharge (dilution-concentration effect). Similar behavior was observed for the concentrations of Cl- and Na+ at the stations of the Solimões, Amazon and Madeira rivers, indicating almost constant release of Cl- and Na+ fluxes during the hydrological cycle. K+ and SiO2 showed almost constant concentrations throughout the years and all the stations, indicating that their flows depend on the river discharge variation. Therefore, the temporal variability of the dissolved inorganic material fluxes in the Solimões and Amazon rivers depends on the hydro-climatic factor and on the heterogeneity of the sources. In the Madeira and Purus rivers there is less influence of these factors, indicating that dissolved load fluxes are mainly associated to silicates weathering. As the Solimões basin contributes approximately 84% of the total flux of dissolved materials in the basin and is mainly under the influence of a hydro-climatic factor, we conclude that the temporal variability of this factor controls the temporal variability of the dissolved material fluxes of the Amazon basin.
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Nóbrega, Rodolfo Luiz Bezerra, Gabriele Lamparter, Harold Hughes, Alphonce Chenjerayi Guzha, Ricardo Santos Silva Amorim, and Gerhard Gerold. "A multi-approach and multi-scale study on water quantity and quality changes in the Tapajós River basin, Amazon." Proceedings of the International Association of Hydrological Sciences 377 (April 16, 2018): 3–7. http://dx.doi.org/10.5194/piahs-377-3-2018.

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Abstract. We analyzed changes in water quantity and quality at different spatial scales within the Tapajós River basin (Amazon) based on experimental fieldwork, hydrological modelling, and statistical time-trend analysis. At a small scale, we compared the river discharge (Q) and suspended-sediment concentrations (SSC) of two adjacent micro-catchments (< 1 km2) with similar characteristics but contrasting land uses (forest vs. pasture) using empirical data from field measurements. At an intermediary scale, we simulated the hydrological responses of a sub-basin of the Tapajós (Jamanxim River basin, 37 400 km2), using a hydrological model (SWAT) and land-use change scenario in order to quantify the changes in the water balance components due to deforestation. At the Tapajós' River basin scale, we investigated trends in Q, sediments, hydrochemistry, and geochemistry in the river using available data from the HYBAM Observation Service. The results in the micro-catchments showed a higher runoff coefficient in the pasture (0.67) than in the forest catchment (0.28). At this scale, the SSC were also significantly greater during stormflows in the pasture than in the forest catchment. At the Jamanxim watershed scale, the hydrological modelling results showed a 2 % increase in Q and a 5 % reduction of baseflow contribution to total Q after a conversion of 22 % of forest to pasture. In the Tapajós River, however, trend analysis did not show any significant trend in discharge and sediment concentration. However, we found upward trends in dissolved organic carbon and NO3- over the last 20 years. Although the magnitude of anthropogenic impact has shown be scale-dependent, we were able to find changes in the Tapajós River basin in streamflow, sediment concentration, and water quality across all studied scales.
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N’kaya, Guy Dieudonne Moukandi, Didier Orange, Sandra Murielle Bayonne Padou, Pankyes Datok, and Alain Laraque. "Temporal Variability of Sediments, Dissolved Solids and Dissolved Organic Matter Fluxes in the Congo River at Brazzaville/Kinshasa." Geosciences 10, no. 9 (August 28, 2020): 341. http://dx.doi.org/10.3390/geosciences10090341.

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For three decades, the solid and dissolved fluxes of the Congo River have been regularly monitored on a monthly basis, despite 12 years of deficiencies (1994–2005). Two programs successively carried out these follow-ups: PEGI/GBF (1987–1993) and SO HYBAM (2006–2017), upstream and downstream, respectively, of the Malebo Pool near Brazzaville, the main hydrometric station of the Congo River. The objective of this study is to examine the temporal dynamic of TSS, TDS and DOC, to explore how these descriptors change over time. Comparison with the two time programs will shed more light on how these descriptors are related to discharge. Afterward, we then find a relationship between total TSS in the water column and that measured in surface for eventual estimation of TSS by remote sensing. In the last decade, compared to the PEGI/GBF period, the discharge of the Congo River was mainly marked by a 4% increase, leading to a significant change on TDS and DOC behaviors. The TSS was quite stable (from 8.2 and 9.3 t km−2 yr−1) due to the low physical erosion well known in this region. The TDS concentrations decreased slightly, by a simple dilution effect. However, the mineral dissolved fluxes (from 11.6 and 10.1 t km-2 yr-1) due to the chemical weathering and atmospheric inputs still predominate over the solid fluxes. Therefore, there was no radical change in the monthly geochemical regime of Congo River Basin (CRB) during these last 30 years. Contrariwise, the DOC concentration marking the biogeochemical processes significantly increased, from 9.0+/−3.0 mg L−1 to 12.7+/−5.0 mg L−1, due to more flooding events in the central part of the CRB. The change for the DOC fluxes is more relevant, with an increase of 45% between the two studied periods, from 11.1 × 106 to 16.2 × 106 t yr−1. This highlights the continuous and actual importance of the “Cuvette Centrale” in the heart of the CRB for dissolved organic matter transport by the Congo River.
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Grassl, Hartmut. "HYPAM." Meteorologische Zeitschrift 11, no. 1 (March 5, 2002): 3–4. http://dx.doi.org/10.1127/0941-2948/2002/0011-0003.

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Guilhen, Jérémy, Ahmad Al Bitar, Sabine Sauvage, Marie Parrens, Jean-Michel Martinez, Gwenael Abril, Patricia Moreira-Turcq, and José-Miguel Sánchez-Pérez. "Denitrification and associated nitrous oxide and carbon dioxide emissions from the Amazonian wetlands." Biogeosciences 17, no. 16 (August 28, 2020): 4297–311. http://dx.doi.org/10.5194/bg-17-4297-2020.

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Abstract. In this paper, we quantify the CO2 and N2O emissions from denitrification over the Amazonian wetlands. The study concerns the entire Amazonian wetland ecosystem with a specific focus on three floodplain (FP) locations: the Branco FP, the Madeira FP and the FP alongside the Amazon River. We adapted a simple denitrification model to the case of tropical wetlands and forced it by open water surface extent products from the Soil Moisture and Ocean Salinity (SMOS) satellite. A priori model parameters were provided by in situ observations and gauging stations from the HYBAM Observatory. Our results show that the denitrification and the trace gas emissions present a strong cyclic pattern linked to the inundation processes that can be divided into three distinct phases: activation, stabilization and deactivation. We quantify the average yearly denitrification and associated emissions of CO2 and N2O over the entire watershed at 17.8 kgN ha−1 yr−1, 0.37 gC-CO2 m−2 yr−1 and 0.18 gN-N2O m−2 yr−1 respectively for the period 2011–2015. When compared to local observations, it was found that the CO2 emissions accounted for 0.01 % of the integrated ecosystem, which emphasizes the fact that minor changes to the land cover may induce strong impacts on the Amazonian carbon budget. Our results are consistent with the state of the art of global nitrogen models with a positive bias of 28 %. When compared to other wetlands in different pedoclimatic environments we found that the Amazonian wetlands have similar emissions of N2O with the Congo tropical wetlands and lower emissions than the temperate and tropical anthropogenic wetlands of the Garonne (France), the Rhine (Europe) and south-eastern Asia rice paddies. In summary our paper shows that a data-model-based approach can be successfully applied to quantify N2O and CO2 fluxes associated with denitrification over the Amazon basin. In the future, the use of higher-resolution remote sensing products from sensor fusion or new sensors like the Surface Water and Ocean Topography (SWOT) mission will permit the transposition of the approach to other large-scale watersheds in tropical environments.
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Dissertations / Theses on the topic "HYBAM"

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Teixeira, Natália de Queiroz. "Fluxo de matéria iônica dissolvida nos rios da Amazônia brasileira: uma análise a partir da base de dados do observatório Ore-Hybam." Universidade Federal do Amazonas, 2012. http://tede.ufam.edu.br/handle/tede/4956.

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The Amazon Basin is the largest drainage basin in the world, occupying a total area of 6.110.000 km2. Its main watercourse is the River Amazon featuring sediment contribution of Andean origin, lot of tributaries, channels under the influence of the hydrologic regimes of flood, full, ebb and dry. Such aquatic environments present unique characteristics regarding the presence of dissolved constituents, these being influenced by dimension and flow of rivers. The dissolved constituents, transported by rivers, stems from the action of rainwater by runoff, and groundwater interaction with soils and rocks. Its chemical composition is the result of dissolution and chemical reactions between solids, liquids and gases, with which the water comes into contact during the hydrological cycle, and may be altered by land use. With the goal of studying the flow balance of matter dissolved ion, specifically ions: Ca2+, Mg2+, Na+, K+, HCO3-, SO42-, Cl- and Si carried by the Amazon basin, this study used the base database of the Ore-Hybam Program (geodynamic controls, hydrological and biogeochemical of erosion/alteration and transfer of materials in the Amazon basin). This program is designed to provide the scientific community trusted data of seasonal variations of water flows and sedimentary geochemistry of the Amazon Basin. The data used for this study were of historical series from 1995 to 2010 in nine collection stations distributed by the Amazon basin, in the rivers Negro, Branco, Solimões/Amazonas, Purus, Madeira and Tapajos. The gathering of this data has given rise to a new basis called definitive basis. Definitive base if calculated the amount of data, average, peak, and minimum concentration, standard deviation and coefficient of inter-annual variation quotas, and monthly flows and ions, with the aid of the Excel Program. Also tried these data for statistical analysis with the aid of the Software Action 2.3, these being, Cluster to observe similar behavior for data collation and Pearson to show correlations between the Ionic composition. It has been estimated the flow of ions in the stations where the interannual and monthly averages, observing the phases of the hydrological cycle, with the descending stream (HCO3-> Ca2+> Si > SO42-> Na+> Cl-> Mg2+> K+). From the calculation of the stream, it has been estimated the flow balance, using equation of mass balance (+ QSa QSb + ... + QSn + Σ = QSx series), monthly and year-to-year in MN + FVA + M (SR + CC) = OB, observing that the Solimões River is the main contributor of ion dissolved matter stream to Óbidos and of its tributaries, the river Madeira is the main contributor
A Bacia Amazônica é a maior bacia hidrográfica do mundo, ocupa uma área total de 6.110.000 km². Seu principal curso de água é o rio Amazonas que apresenta contribuição de sedimentos de origem Andina, grande quantidade de afluentes, canais sob a influência dos regimes hidrológicos de enchente, cheia, vazante e seca. Tais ambientes aquáticos apresentam características diferenciadas quanto à presença de constituintes dissolvidos, sendo estes influenciados pela cota e vazão dos rios. Os constituintes dissolvidos, transportados pelos rios, provem da ação da água da chuva, pelo escoamento superficial e da interação da água subterrânea com os solos e rochas. Sua composição química resulta da dissolução e de reações químicas entre sólidos, líquidos e gases, com os quais a água entra em contato durante o ciclo hidrológico, podendo ser alterada pelo uso da terra. Com o objetivo de estudar o balanço do fluxo da matéria iônica dissolvida, especificamente os íons: Ca2+, Mg2+, Na+, K+, HCO-3, SO42-, Cl- e Si transportados pela Bacia Amazônica, o presente estudo utilizou o banco de dados da base do Programa Ore-Hybam (Controles geodinâmico, hidrológico e biogeoquímico da erosão/alteração e da transferência de matérias na Bacia Amazônica). Este programa tem a finalidade de disponibilizar a comunidade científica, dados confiáveis das variações sazonais dos fluxos hídricos, sedimentares e geoquímicos da Bacia Amazônica. Os dados utilizados para esse trabalho foram da série histórica de 1995 a 2010 em nove estações de coleta distribuídas pela Bacia Amazônica, nos rios Negro, Branco, Solimões/Amazonas, Purus, Madeira e Tapajós. A reunião desses dados originou uma nova base denominada base definitiva. Da base definitiva se calculou a quantidade de dados, concentração média, máxima e mínima, desvio padrão e coeficiente de variação interanuais e mensais das cotas, vazões e íons, com auxílio do Programa Excel. Trataram-se também esses dados por análises estatísticas com auxílio do Software Action 2.3, sendo estas, Cluster para observar o comportamento semelhante por agrupamento de dados e Pearson para mostrar as correlações entre a composição iônica. Calculou-se o fluxo dos íons nas estações, onde foram obtidas as médias interanuais e médias mensais, observando as fases do ciclo hidrológico, obtendo-se a ordem decrescente de fluxo (HCO-3> Ca2+> Si> SO42--> Na+> Cl-> Mg2+> K+). A partir do cálculo do fluxo, calculou-se o balanço do fluxo, através da equação do balanço de massa (QSa+QSb+...+QSn+Σ=QSx), interanual e mensal em MN + FVA+ M (SR+CC) = OB, observando-se que o rio Solimões é o maior contribuinte de fluxo de matéria iônica dissolvida para a estação de Óbidos e de seus tributários, o rio Madeira é o maior contribuinte
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Santini, William. "Caractérisation de la dynamique hydro-sédimentaire du bassin de l'Ucayali (Pérou), par une approche intégrant réseau de mesures, télédétection et modélisation hydrologique." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30276.

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Dans un contexte d’intensification de la variabilité climatique et de la pression anthropique sur les bassins de l’avant pays du bassin Amazonien, la compréhension des dynamiques hydro-sédimentaires devient plus que jamais un enjeu crucial pour garantir un développement durable dans cette région. La taille considérable de ce bassin impose une approche intégrée pour effectuer un suivi dynamique des flux particulaires, couplant données in-situ, télédétection (couleur de l’eau et altimétrie spatiale), campagnes de mesures de calibration/validation, et la modélisation hydrologique. C’est pourquoi ce problème a été approché en identifiant deux modes granulométriques dominant le cortège d’alluvions transportées par les grandes rivières du bassin Amazonien. D’une part, les silts et les petits agrégats, qui peuvent être suivis en surface par satellite, et d’autre part les sables fins en suspension graduée, invisibles pour les satellites, mais dont le transport peut être modélisé par des équations issues de l’hydraulique. Afin de relier la concentration en matières en suspension en surface, mesurée par satellite, et la concentration moyenne dans une section de mesure, une formulation physique est proposé (Santini et al., 2019) et validée à partir d’un jeu de données hydro-sédimentaires exceptionnel, collecté en Amazonie péruvienne dans le cadre des activités du SO HyBAm. Ce modèle est également un outil puissant pour optimiser l’échantillonnage dans la colonne d’eau et le suivi in situ de concentration dans les grands fleuves. Les paramètres hydrauliques nécessaires à son application, mais également aux lois de capacité de transport utilisées pour simuler les flux de sables, sont obtenus à partir du modèle hydrologique semi-distribué SWAT. Ce dernier a été utilisé pour simuler le cycle hydrologique dans un bassin test de 350 000 km², l’Ucayali. Ce bassin, qui est la branche mère du fleuve l’Amazone, roule 12 000 m3 s-1 et exporte à l’Amazone 293 106 t an-1 de sédiments. Les dynamiques hydro-sédimentaires intra-annuelles complexes ont mis en échec les approches de routage de l’eau et des sédiments implantées dans le modèle SWAT. En particulier, les effets d’épanchement des crues dans le lit majeur et de remous, qui contrôlent à l’échelle saisonnière les processus de sédimentation et de recyclage sédimentaire dans le bassin. De nouveaux modules de routage hydraulique et sédimentaire ont donc été implantés, en prenant en compte les effets précités. Le modèle SWAT ainsi modifié permet une excellente simulation des débits journaliers à l’exutoire de l’Ucayali (Nasch de 0.94), des vitesses moyennes et des hauteurs d’eau. Ces paramètres hydrauliques sont ensuite utilisés pour l’application de lois de capacité de transport afin de calculer un flux sables, et pour l’utilisation du modèle physique permettant de relier la concentration satellite en particules fines à une concentration moyenne. Cette approche permet ainsi, en s’appuyant sur le réseau conventionnel in-situ et sur des stations « virtuelles » où les flux sont suivis par simulation et par satellite, de proposer un bilan dynamique détaillé et étendu pour le bassin de l’Ucayali
Because increasing climatic variability and anthropic pressures have affected the sediment dynamics of large tropical rivers, long-term sediment concentration series have become crucial for understanding the related socio-economic and environmental impacts. The large size of this basin requires an integrated approach to dynamically monitor sediment flows, by coupling in-situ data, remote sensing (water colour and spatial altimetry), calibration/validation measurement campaigns, and hydrological modelling. This is why this problem has been approached by identifying two grain size modes that dominate the process of sediment transport in the major rivers of the Amazon basin. On the one hand, the silts and small aggregates, which can be monitored at the water surface by satellite, and on the other hand, the fine sands in graded suspension, invisible to satellites, but whose transport can be modelled by equations derived from hydraulics.In order to link the surface suspended sediment concentration, measured by satellite, and the average concentration in a river reach, a physical formulation is proposed (Santini et al., 2019) and validated from an exceptional hydro-sedimentary dataset collected in the Peruvian Amazon as part of the SO HyBAm activities. This model is also a powerful tool for optimizing water column sampling and in situ concentration monitoring in large rivers. The hydraulic parameters required for its application, but also for the laws of transport capacity used to simulate sand flows, are derived from the semi-distributed SWAT hydrological model. The latter was used to simulate the hydrological cycle in a 350,000 km² test basin, the Ucayali. This basin, which is the main branch of the Amazon River, discharges 12,000 m3 s-1 of water and exports 293 106 t year-1 of sediment to the Amazon River. Complex intra-annual hydro-sedimentary dynamics have thwarted the water and sediment routing approaches implemented in the SWAT model. In particular, the effectsof flooding on the river flood wave propagation, which seasonally control sedimentation and sediment recycling processes in the basin. New hydraulic and sedimentary routing modules have therefore been implemented into the model, taking into account the above-mentioned effects.The modified SWAT model allows an excellent simulation of daily flows at the Ucayali outlet (Nasch of 0.94), average velocity, and water levels. These hydraulic parameters are then used for the application of transport capacity laws to calculate a sand flow, and for the use of the physical model to link the satellite fine particle concentration to an average concentration. This approach thus makes it possible, based on the conventional in situ network and on “virtual” stations where flows are monitored by simulation and satellite, to propose a detailed and extended dynamic assessment for the Ucayali basin
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Simonsen, Simon. "En analyse av dimensjoneringsgrunnlaget for HYBAS – en hybrid avløpsrenseprosess." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, Institutt for produktutvikling og materialer, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10430.

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Kaldnes HYBAS (Hybrid Biofilm Activated-Sludge) avløpsvann-renseprosess består av to prosesser som er relativt godt forstått: Aktivslam (AS) og Moving-Bed Biofilm Reactor (MBBR), biofilm med bevegelige bærere. Det finnes en stor del litteratur, men spesielt for Aktivslam, som beskriver virkemåten og dimensjoneringsprosedyrer for de to systemene. For HYBAS er det viktig å få kunnskap om hvordan biofilm interakterer med aktivslammet og å danne en metode for dimensjonering av en fullstendig HYBAS prosess. Professor Hallvard Ødegaard ved NTNU har foreslått en modell for HYBAS, formulert som en 15-stegs utregnings-prosedyre, delvis basert på erfaringsdata, men med vekt på å være logisk og intuitiv. Denne modellen er analysert for overenstemmelse med litteraturen. Små modifikasjoner som forbedrer nøyaktigheten og generaliserer modellen er foreslått. Modellen er implementert i et Excel regneark for å muliggjøre eksperimentering og videre utvikling av modellen. En analyse av enkelte komponenter av modellen mot data fra et pilot-anlegg er forsøkt, men med betydelige problemer. Noen gode overenstemmelser med modellen blir vist, men også sterke uoverenstemmelser med modellen blir identifisert, med forbehold.

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Books on the topic "HYBAM"

1

Yun, Mu-byŏng. Hyuam-ni. [Seoul]: Kungnip Chungang Pangmulgwan, 1990.

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Yun, Mu-byŏng. Hyuam-ni. [Seoul]: Kungnip Chungang Pangmulgwan, 1990.

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Hyam Plutzik: The collected poems. Brockport, USA: BOA Editions, 1987.

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Kayasan Chŏngjin pul: Hyeam Kŭn Sŭnim iyagi : Chŏng Ch'an-ju changp'yŏn sosŏl. Sŏul-si: Raendŏm Hausŭ K'oria, 2010.

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Sŏn-yu, Kim, and Miral Chʻulpʻansa Kihoeksil, eds. Hyeam Kŭn Sŭnim ŭi pyŏrang kkŭt e sŏsŏ kil ŭl munnŭn kŭdae ege. Sŏul Tʻŭkpyŏlsi: Miral, 1985.

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Hyeam. Chosasŏn eroŭi kil: Hyeam pŏbŏjip = Gateway to patriarchal Sŏn : venerable master Hye-Am's dharma talks. Sŏul: Sŏnmun Chʻulpʻansa, 1987.

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Jaco, William H., Hyam Rubinstein, Craig David Hodgson, Martin Scharlemann, and Stephan Tillmann. Geometry and topology down under: A conference in honour of Hyam Rubinstein, July 11-22, 2011, The University of Melbourne, Parkville, Australia. Providence, Rhode Island: American Mathematical Society, 2013.

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Caswell, Brian. Hyram & B. Hodder Headline Australia Children's Books, 2003.

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Hyuam Paek In-gol ui saengae wa sasang: Hyuam sasang yongu nonchong. Hyuam Sonsaeng Kinyom Saophoe, 1997.

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1497-1579, Paek In-gŏl, and Hyuam Sasang Yŏnʼgu Nonchʻong Pʻyŏnjip Wiwŏnhoe., eds. Hyuam Paek In-gŏl ŭi saengae wa sasang: Hyuam sasang yŏnʼgu nonchʻong. Sŏul Tʻŭkpyŏlsi: Hyuam Sŏnsaeng Kinyŏm Saŏphoe, 1997.

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Book chapters on the topic "HYBAM"

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W., Santini, Guyot J.L, Lavado W., Espinoza J.C., Vauchel P., Cochonneau G., Apaestegui J., et al. "4. HYBAM: un observatorio para medir el impacto del Cambio Climático sobre la erosión y los flujos de sedimentos en la zona Andino-Amazónica." In El Perú frente al cambio climático, 59–71. IRD Éditions, 2014. http://dx.doi.org/10.4000/books.irdeditions.19721.

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"Hyam v. Director of Public Prosecutions." In Controversies in Criminal Law, 11–16. Routledge, 2019. http://dx.doi.org/10.4324/9780429034213-2.

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Gibson, William L. "Famine in Guangxi, Railroads in Guangzhou – Norodom’s Last Bon Om Touk – Salome in Singapore – Chulalongkorn’s Jubilee – Sel Hybat – Is the Emperor Mad? – Even the Dead Are Partying – Farewell to the King of the Khmers – Typhoon." In Alfred Raquez and the French Experience of the Far East, 1898–1906, 76–94. Routledge, 2021. http://dx.doi.org/10.4324/9781003145226-5.

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"British reactions to the Jewish flight from Europe This article results from research financed by Queen Mary and Westfield College, London; The Central Research Fund of the University of London; the Memorial Foundation for Jewish Culture; the Economic and Social Research Council; the Harold Hyam Wingate Foundation; the Oxford Centre for Postgraduate Hebrew Studies and the British Academy. Crown Copyright material in the Public Record Office is reproduced by permission of Her Majesty’s Stationery Office. The Neville Chamberlain papers are quoted by permission of Birmingham University Library." In Britain and the Threat to Stability in Europe, 1918–45. Bloomsbury Academic, 1993. http://dx.doi.org/10.5040/9781474291880.ch-004.

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Conference papers on the topic "HYBAM"

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Xu, Tian-Bing, and Ji Su. "Theoretical Modeling for Electroactive Polymer-Ceramic Hybrid Actuation Systems." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-62491.

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An electroactive polymer-ceramic hybrid actuation system (HYBAS) was recently developed. The HYBAS demonstrates significantly-enhanced electromechanical performance by utilizing advantages of cooperative contributions of the electromechanical responses of an electrostrictive copolymer and an electroactive single crystal. The hybrid actuation system provides not only a new type of device but also a concept to utilize different electroactive materials in a cooperative and efficient method for optimized electromechanical performance. In order to develop an effective procedure to optimize the performance of a hybrid actuation system (HYBAS), a theoretical model has been developed, based on the elastic and electromechanical properties of the materials utilized in the system and on the configuration of the device. The model also evaluates performance optimization as a function of geometric parameters, including the length of the HYBAS and the thickness ratios of the constituent components. The comparison between the model and the experimental results shows a good agreement and validates the model as an effective method for the further development of high performance actuating devices or systems for various applications.
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Brouard, P., P. Dreuillet, A. Brun, L. Constancias, J. Peyret, and S. Attia. "HYCAM: a new S band surface radar testbed." In IET International Radar Conference 2013. Institution of Engineering and Technology, 2013. http://dx.doi.org/10.1049/cp.2013.0225.

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Nijim, Mais, Young Lee, and Kiranmai Bellam. "HyBuM: Hybrid Energy Efficient Architecture for Mobile Storage Systems." In 2012 Ninth International Conference on Information Technology: New Generations (ITNG). IEEE, 2012. http://dx.doi.org/10.1109/itng.2012.37.

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Kinsey, Trevor J., T. J. Bussell, and M. C. Chick. "Hycam camera study of the features of a deflagrating munition." In 19th Intl Congress on High-Speed Photography and Photonics. SPIE, 1991. http://dx.doi.org/10.1117/12.24088.

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Yoann Paichard. "HYCAM: A RCS Measurement and Analysis System for Time-Varying Targets." In 2006 IEEE Instrumentation and Measurement Technology. IEEE, 2006. http://dx.doi.org/10.1109/imtc.2006.236676.

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Paichard, Yoann, Juan Carlos Castelli, Philippe Dreuillet, and Gerard Bobillot. "HYCAM: A RCS Measurement and Analysis System for Time-Varying Targets." In 2006 IEEE Instrumentation and Measurement Technology. IEEE, 2006. http://dx.doi.org/10.1109/imtc.2006.328248.

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Zhang, Qinghai. "A Hybrid Framework for Free-Surface Flows With Irregular Solid Boundaries." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20594.

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The author presents a hybrid continuum-particle framework (HyPAM) consisting of three components. The first is a second-order interface tracking method: the Polygonal Area Mapping (PAM) method [Zhang and Liu 2008. J. Comput. Phys. 227(8):4063–4088], which represents material areas explicitly as piecewise polygons and utilizes polygon-clipping algorithms from computational geometry. In addition to its mesh-topology independence, the PAM method is free of numerical diffusion and tracks interfaces with or without singularities naturally and accurately. Both numerical experiments and theoretical analyses show that the PAM method is superior to existing VOF methods. The second component is a hybrid formulation for free-surface flows [Zhang and Liu 2009. J. Comput. Phys. 228(4):1312–1342]. A graph-based algorithm decomposes the water phase into a continuum zone and a particle zone, where the Euler equations and the free fall of rigid bodies are used as the governing equations, respectively and separately. The third component is the Explicit Jump Approximation (EJA) method for handling irregular solid boundaries in viscous flows [Zhang and Liu 2010. J. Comput. Phys. in press]. An analysis shows that the widely-used linear and quadratic ghost-cell approaches (GCA) are inconsistent and first-order accurate, respectively. As a remedy, the jump corrections at the solid-fluid interface are explicitly approximated and incorporated into the discretization of the Laplacian operator to obtain second-order convergence. Further developments of HyPAM include a fourth-order Navier-Stokes solver with adaptive mesh refinement (AMR), incorporating a particle method, and multi-material three-dimensional interface tracking.
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Su, Ji, and Tian-Bing Xu. "A modified electroactive polymer-ceramic hybrid actuation system (HYBAS) for aerodynamic control applications." In Smart Structures and Materials, edited by Yoseph Bar-Cohen. SPIE, 2005. http://dx.doi.org/10.1117/12.600020.

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Xu, Tian-Bing, Ji Su, Xiaoning Jiang, Paul W. Rehrig, Shujun Zhang, Thomas R. Shrout, and Qiming Zhang. "Effect of bending stiffness of the electroactive polymer element on the performance of a hybrid actuator system (HYBAS)." In Smart Structures and Materials, edited by Yoseph Bar-Cohen. SPIE, 2006. http://dx.doi.org/10.1117/12.661186.

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Reports on the topic "HYBAM"

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Parkins, Owen. HyRAM Testing Script. Office of Scientific and Technical Information (OSTI), December 2014. http://dx.doi.org/10.2172/1166646.

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Zumwalt, Hannah Ruth, and Katrina M. Groth. HyRAM V1.0 User's Manual. Office of Scientific and Technical Information (OSTI), August 2015. http://dx.doi.org/10.2172/1432923.

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Groth, Katrina M., Hannah Ruth Zumwalt, and Andrew Jordan Clark. HyRAM V1.0 User Guide. Office of Scientific and Technical Information (OSTI), March 2016. http://dx.doi.org/10.2172/1431287.

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Sena, Ethan Andrew, Brian David Ehrhart, and Alice Baca Muna. HyRAM V1.1 User Guide. Office of Scientific and Technical Information (OSTI), January 2018. http://dx.doi.org/10.2172/1513519.

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Feliciano, Guillermo, Brian Ehrhart, and Alice Muna. HyRAM V2.0 User Guide. Office of Scientific and Technical Information (OSTI), July 2019. http://dx.doi.org/10.2172/1762969.

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Reynolds, John Thomas. HyRAM Testing Strategy and Quality Design Elements. Office of Scientific and Technical Information (OSTI), December 2014. http://dx.doi.org/10.2172/1166698.

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Ehrhart, Brian, Ethan Hecht, and Jamal Mohmand. Validation and Comparison of HyRAM Physics Models. Office of Scientific and Technical Information (OSTI), May 2021. http://dx.doi.org/10.2172/1813659.

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Ehrhart, Brian, and Ethan Hecht. Hydrogen Risk Assessment Models (HyRAM) Version 3.0 Technical Reference Manual. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1673177.

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Ehrhart, Brian, and Ethan Hecht. Hydrogen Risk Assessment Models (HyRAM) Version 3.1 Technical Reference Manual. Office of Scientific and Technical Information (OSTI), May 2021. http://dx.doi.org/10.2172/1784842.

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Groth, Katrina, Ethan Hecht, John Thomas Reynolds, Myra L. Blaylock, and Erin E. Carrier. Methodology for assessing the safety of Hydrogen Systems: HyRAM 1.1 technical reference manual. Office of Scientific and Technical Information (OSTI), March 2017. http://dx.doi.org/10.2172/1365456.

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