Consulta: subjectFacets:"River discharge"
Registros recuperados: 16
Data/hora: 08/06/2024 10:30:03

Characterization of water availability in a hydrographic basin
Provedor de dados: 70
Autores: Arai,Fabiane K.; Pereira,Silvio B.; Gonçalves,Geula G. G.
The quantitative knowledge of hydrological parameters (rainfall and flow) and their spatial and temporal variability on the regions or basins should be understood as essential to the efficient planning and management of water resources. Because the Ivinhema Basin, located in the state of Mato Grosso do Sul, Brazil, represents an important inductor on the region agricultural development, characterized as a major producer of grains and meat, it was used to characterize the hydrological study. Knowing the rainfall, flow and drainage area of each of the studied affluent, it was calculated the proportion of contribution of the affluent. To that end, it was proposed the concepts of potential and real contributions, aiming to identify the proportion of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: River discharge; Water resources; Rainfall.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000300018

Influence des apports fluviatiles en Baie de Seine
Provedor de dados: 5
Autores: Avoine, J; Crevel, L.
Hydrological study of Seine Bay displays two areas differentiated by salinity distribution. One has marine characteristics and the other is under fluvial influence. In this paper the authors give the main results of exchanges between the environments, obtained by the study of water dilution, solid particles dispersion, and their contribution to sedimentation.
Tipo: Text
Palavras-chave: Estuarine front; River plumes; Trace metals; Salinity; Residual flow; Seasonal variations; Environmental effects; Sediment dynamics; Estuarine sedimentation; River discharge.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1275.pdf

Suspended Sediment Dynamics in the Macrotidal Seine Estuary (France) - Part 2: Numerical Modeling of Sediment Fluxes and Budgets Under Typical Hydrological and Meteorological Conditions
Provedor de dados: 5
Autores: Schulz, Elisabeth; Grasso, Florent; Le Hir, Pierre; Verney, Romaric; Thouvenin, Benedicte.
Understanding the sediment dynamics in an estuary is important for its morphodynamic and ecological assessment as well as, in case of an anthropogenically controlled system, for its maintenance. However, the quantification of sediment fluxes and budgets is extremely difficult from in-situ data and requires thoroughly validated numerical models. In the study presented here, sediment fluxes and budgets in the lower Seine Estuary were quantified and investigated from seasonal to annual time scales with respect to realistic hydro- and meteorological conditions. A realistic three-dimensional process-based hydro- and sediment-dynamic model was used to quantify mud and sand fluxes through characteristic estuarine cross-sections. In addition to a reference...
Tipo: Text
Palavras-chave: Macrotidal estuary; Sediment fluxes; Numerical modelling; Mud/sand; Wind/waves; River discharge.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00416/52772/53640.pdf

Etude du comportement geochimique du fer dans l'estuaire de la Seine
Provedor de dados: 5
Autores: Guegueniat, P; Boust, D; Gandon, R; Hemon, G; Phillipot, J; Sanchez, J; Marin, P; Pieri, J.
This paper reports the study of iron geochemical behavior by the measurement of total iron, iron associated with mineral coat, and ratio FEII/FEIII. The results of total iron are exploited by normalisation with regard to aluminium and scandium.
Tipo: Text
Palavras-chave: River discharge; Sediments; Suspended particulate matter; Ion association; Iron; Geochemical cycle.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1301.pdf

Le fluorure en Baie de Seine
Provedor de dados: 5
Autores: Aminot, Alain; Leguellec, A; Mauvais, J.
This paper deals with the water concentrations of fluoride in the bay of Seine outfall. Many graphs report spatial variations and the results obtained are compared with normal marine values.
Tipo: Text
Palavras-chave: Pollution dispersion; Industrial wastes; River discharge; Marine pollution; Fluorides.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1294.pdf

Distribution de 40 elements a l''etat de traces dans les suspensions de la Seine. Utilisation du lanthane pour etudier les processus sedimentaires dans l''estuaire et dans la baie
Provedor de dados: 5
Autores: Guegueniat, P; Boust, D; Hemon, G; Phillipot, J; Lagarde, G; Heitz, C.
This work has three objectives in view: (1) the establishment of spatial distribution of 40 trace elements in suspensions and sediments of the Seine estuary and bay; (2) the research of non-reactive geochemical tracers of fluvial deposits; and (3) the illustration of sediment dynamics influence on distribution of elements during the particulate period.
Tipo: Text
Palavras-chave: Sediment chemistry; River discharge; Geographical distribution; Estuarine dynamics; Sediment dynamics; Suspended particulate matter; Trace elements.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1297.pdf

Pouvoir complexant des eaux de l'estuaire de la Seine
Provedor de dados: 5
Autores: Fischer, J; Wartel, M; Guegueniat, P; Gandon, R.
Copper has been studied, by the authors, owing to its ability to complex with various organic ligands of natural waters. Metals extraction and liberation can be explained, in part, by this complexing capacity.
Tipo: Text
Palavras-chave: Estuaries; Suspended particulate matter; Dissolved organic matter; Copper; River discharge; Ion association; Metals; Biogeochemical cycle; Water properties.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1298.pdf

Les elements nutritifs en baie de Seine
Provedor de dados: 5
Autores: Aminot, Alain; Kerouel, Roger; Mauvais, J.
Seasonal variations of dissolved nutrient concentrations are reported in this paper. Impacts of freshwater are investigated by the study of dilution, nutrient quantity, and relation with phytoplanktonic growth.
Tipo: Text
Palavras-chave: Silicon; Phosphorus; Nitrogen; Seasonal variations; Dilution; Primary production; Eutrophic waters; Phytoplankton; River discharge; Coastal zone; Nutrients (mineral).
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1295.pdf

Approche de la circulation residuelle en Baie de Seine
Provedor de dados: 5
Autores: Lehir, P; Salomon, J; Leprovost, C; Chabertd'Hieres, G; Mauvais, J.
By taking into account salinity measurements and consequently mean residence time, current measurements, tidal computation with a 2-D model and wind induced currents provided by a 3-D model, a global diagram of residual flow in Seine Bay is given. Main patterns are exhibited: density currents in the eastern part of the bay, off the Seine Estuary, wind induced circulation, especially along the coast and over the Channels, and tidal residual patterns induced by topography.
Tipo: Text
Palavras-chave: Simulation; Modelling; Wind driven circulation; Bottom topography; Density gradients; Water masses; River discharge; Haline circulation; Salinity gradients; Tidal currents; Residual flow.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1263.pdf

Evaluation des apports fluviatiles dans l''estuaire de la Seine
Provedor de dados: 5
Autores: Avoine, J.
Economic activities and urbanization along the Seine watershed, are the main factors of increased river discharge with natural deposits. A long term supervision of this river has allowed the assessment of the liquid flow rate, the solid load, and the metallic pollution.
Tipo: Text
Palavras-chave: Seasonal variations; Trace metals; Sediment transport; Fluid flow; Brackishwater pollution; Estuarine sedimentation; River discharge.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1274.pdf

Effect of river runoff on sea level from in-situ measurements and numerical models in the Bay of Biscay
Provedor de dados: 5
Autores: Laiz, Irene; Ferrer, Luis; Plomaritis, Theocharis A.; Charria, Guillaume.
Daily time series of in-situ tide gauge records and river runoff data were analysed to investigate the contribution of river discharge storm events to sea level in the Bay of Biscay. Three main river systems were considered for this study, representing cases of small (Nervión, 1900 km2), medium (Adour, 16880 km2) and large (Gironde, 84811 km2) watershed basins. Typical storms correspond to water discharge rates of 150, 700, and 1100 m3 s−1 from the Nervión, Adour, and Gironde rivers, respectively. The effect of these events on daily mean sea level was evaluated using two different approaches: (1) through the analysis of time series of tide gauges placed within the river mouths; and (2) through numerical simulations using the ROMS model (Regional Ocean...
Tipo: Text
Palavras-chave: Bay of Biscay; Sea level; Tide gauges; River discharge; ROMS modelling.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00169/28070/26285.pdf

Impact of a river flash flood on microbial carbon and nitrogen production in a Mediterranean Lagoon (Thau Lagoon, France)
Provedor de dados: 5
Autores: Fouilland, E.; Trottet, A.; Bancon-montigny, C.; Bouvy, M.; Le Floc'H, E.; Gonzalez, Jean-louis; Hatey, E.; Mas, S.; Mostajir, B.; Nouguier, J.; Pecqueur, D.; Rochelle-newall, E.; Rodier, C.; Roques, C.; Salles, C.; Tournoud, M. -g.; Vidussi, F.
Over half of the total nitrogen, phosphorus, silicate and dissolved organic carbon (DOC) loading was discharged from the Wile River into the Thau Lagoon waters within the first five days of what was considered to be the autumn flash flood period. Such loads represented about 8% and 3% of the yearly averaged total nitrogen and phosphorus load in Thau Lagoon, respectively. Although this event affected &gt;20% of the total lagoon volume, river trace metal loads contributed apparently only weakly to the increase in labile trace metal concentrations in the lagoon surface waters. Differences between theoretical dilution values and observed values were also noticed for phosphate, silicate and dissolved organic carbon (DOC) concentrations. DOC losses (10-50%)...
Tipo: Text
Palavras-chave: River discharge; Phytoplankton and bacteria production; DIN uptake rates; Metal contaminants; Mediterranean coastal waters.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00130/24165/22492.pdf

A palynological and palaeoclimatological record from the southern Philippines since the Last Glacial Maximum
Provedor de dados: 5
Autores: Bian, Yeping; Jian, Zhimin; Weng, Chengyu; Kuhnt, Wolfgang; Bolliet, Timothe; Holbourn, Ann.
A palynological analysis of a marine sediment core in the southern Philippines, provides a detailed regional vegetation and climate history for the West Pacific Warm Pool (WPWP) since the Last Glacial Maximum (LGM). Chronology was determined by a detailed oxygen isotope record. A higher representation of pollen from tropical upper montane rainforest during the LGM indicate that this forest type moved down along elevation, probabaly due to the lowered temperature. During the last deglaciation and the early Holocene, mangroves were more expanded and tropical mid and upper montane rainforests were restricted, suggesting a rising sea-level and temperature increase. Herbaceous pollen and pteridophyte spore records indicate a much drier condition during the LGM...
Tipo: Text
Palavras-chave: Last Glacial Maximum; Tropical rainforests; Palynological analyses; Sea-level change; River discharge.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00213/32468/30921.pdf

Influence of Seawall Line Choice on Tide Lock Drainage in Tidal Flat Inning:Cangdongpian Inning Area on the west part of Tiaozini Sand as a case study.
Provedor de dados: 20
Autores: Li, Jialin; Wang, Yanhong; Zhang, Renshun.
Most of the flood from the wide inner lowland plain discharges through tide locks on coast, and the influence of tidal flat inning projects on the tide lock drainage must be solved by seawall line choice. Taking the Cangdongpian inning area on the west side of Tiaozini Sand as a case study, the paper analyzed the compages and validity of ebb tide water to maintain the flood discharge creek below the tide lock for different projects of seawall line. Result indicates that a rational seawall line program has little influence on the flood discharge of lock during the mean tide or general spring tides, but has certain influences during a storm surge or an extreme spring tide in autumn. However it could be resolved by several times of artificial scour on the...
Tipo: Journal Contribution
Palavras-chave: Tidal flats; River discharge.
Ano: 2007
URL: http://hdl.handle.net/1834/5854

Meteorological and hydrological variables on occurrence of riverbank erosion along lower São Francisco river
Provedor de dados: 91
Autores: Rocha,Igor P. da; Holanda,Francisco S. R.; Araújo Filho,Renisson N.; Casado,Ana P. B.; Bandeira,Arilmara A.
The objectives of this paper were to analyze the seasonal distributions of climatic and hydrological variables along the Lower São Francisco River, Northeastern Brazil, between the States of Sergipe and Alagoas, and further, to verify their relationships with the erosion of the right margin in Sergipe State. The investigated area comprises the sedimentary portions of the Lower São Francisco River, located at the Cotinguiba-Pindoba Irrigated Perimeter. Historical records of variables such as rainfall, river streamflow velocity, river discharge, wind velocity and the predominant direction were collected from a climatological station as well as rain and streamflow gauges located in the municipality of Propriá. The rainfall that occurs in the region is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: River discharge; Wind; Rainfall; Water resources.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000200004

Factors driving seed dispersal in a Neotropical river-floodplain system
Provedor de dados: 39
Autores: Fernández,Florencia Facelli; Schneider,Berenice; Zilli,Florencia.
ABSTRACT Dispersal is a key process affecting the diversity of natural communities. We addressed hydrochory of wetland plant seeds in the Middle Paraná River floodplain. We first studied seed dispersal by drifting macrophytes in the Paraná River main channel (MC), in a high discharge secondary channel (HD) and in two low discharge channels (LD) during an extraordinary flood. We then experimentally analyzed the effect of standing (SW) and moving water (MW) on seed buoyancy of different plant communities. We recorded seeds of 27 taxa distributed in 12 families. Taxa richness ranged from 17 in LD to 25 in MC, and included seeds of terrestrial, palustrine and aquatic plants. River discharge did not affect seed richness and density, which was probably...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dispersal; Drifting macrophytes; Hydrochory; Middle Paraná River; Propagules; River discharge; Water movement.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300465