Sédimentation des molécules; coefficient de sédimentation des A.D.N. Dans les appareils à sédimentation, la substance à étudier est mise en suspension dans l'eau (ou dans l'huile); on observe le dépôt de la matière et on évalue la grosseur des grains déposés en fonction du temps (Brajnikov, Pétrogr. et rayons X, 1936, p. 14). Les balances de sédimentation, sorte de plateau ou de

  • sedimentation English-French Dictionary

    sedimentation n noun: Refers to person, place, thing, quality, etc. (layering of deposits) sédimentation nf nom féminin: s'utilise avec les articles "la", "l'" (devant une voyelle ou un h muet), "une". Ex : fille nf > On dira "la fille" ou "une fille". Avec un nom féminin, l'adjectif s'accorde. En général, on ajoute un "e" à l'adjectif. Par exemple, on dira "une petit e fille". dépôt

  • Short-term sedimentation in Tagus estuary, Portugal: the

    Short-term sediment deposition was studied at four salt marsh areas in the Tagus estuary. In areas covered with Sarcoia perennis,Sarcoia fruticosa,Halimione portulacoides and Spartina maritima and also in the non-vegetated areas, sedimentation was measured as the monthly accumulation of sediments on nylon filters anchored on the soil surface, from August 2000 to May 2001.

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  • Définition Sédimentation Futura Santé

    Sédimentation. Définition Classé sous : médecine. Séparation du sang en ses composants liquide (plasma) et solide (globules) ; le sédiment la partie solide se dépose au fond du tube et

  • Medium-term sedimentation on high intertidal mudflats

    01/09/1998· Medium-term sedimentation on high intertidal mudflats and salt marshes in the Severn Estuary, SW Britain: the role of wind and tide Author links

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  • Spatial and temporal factors controlling short-term

    22/07/2003· Spatial and temporal factors controlling short-term sedimentation in a salt and freshwater tidal marsh, Scheldt estuary, Belgium, SW Netherlands Authors S. Temmerman ,

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  • Spatial and temporal factors controlling short‐term

    Sedimentation rates however strongly decrease with increasing (1) surface elevation, (2) distance from the nearest creek or marsh edge and (3) distance from the marsh edge measured along the nearest creek. Based on these three morphometric parameters, the spatio‐temporal sedimentation pattern can be modelled very well using a single multiple regression model for both the salt and freshwater

  • Sedimentation Wikipedia

    Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier. This is due to their motion through the fluid in response to the forces acting on them: these forces can be due to gravity, centrifugal acceleration, or electromagnetism.. In geology, sedimentation is often described as the opposite of erosion, i

  • Flow, Sedimentation, and Biomass Production on a

    A 1‐D model for exploring the interaction between hydrodynamics, sedimentation, and plant community evolution on a salt marsh populated by Spartina alterniflora is developed. In general macrophyte characteristics are determined by a wide range of processes; here, based on field studies at North Inlet estuary, South Carolina, the biomass of the S. alterniflora on the marsh platform is simply

  • Estuarine, Coastal and Shelf Science

    sedimentation rates calls for caution in extrapolating long-term patterns of mudflat and salt marsh sedimentation from short-term rates of accretion, especially in view of the susceptibility of such environments to flooding by sea-level rise. The results reported in this are part of a study undertaken with the aim of charac-terising the morphology and sediment dynamics of a small

  • Medium-term sedimentation on high intertidal mudflats

    01/09/1998· Medium-term sedimentation on high intertidal mudflats and salt marshes in the Severn Estuary, SW Britain: the role of wind and tide Author links

  • Spatial and temporal factors controlling short-term

    Spatial and temporal factors controlling short-term sedimentation in a salt and freshwater tidal marsh, Scheldt estuary, Belgium, SW Netherlands July 2003 Earth Surface Processes and Landforms 28

  • sedimentation salt patterns de-balans-timmerwerken

    spatial flow and sedimentation patterns on a tidal marsh, for a single tidal cycle. Implications for the long-term formation of tidal marsh landforms are discussed. 2. Study Area [9] The Delft3D model was applied to a tidal creek catchment (5.6 ha) within the Paulina salt marsh in the Scheldt estuary, SW Netherlands (Figure 1). The local tidal . PATTERNS OF SEDIMENTATION IN A SALT MARSH

  • Conditional effects of tides and waves on short-term

    Salt marshes are in danger of degradation due to human impact and climate change. A thorough understanding of mechanisms controlling sedimentation and erosion in salt marshes is essential for their conservation and restoration. To understand short-term dynamics of sediment avaiility and deposition around marsh edges, two contrasting marshes

  • Short-Term Sedimentation Processes and Accretion Rates

    Park, E.-J.; Yu, K.B.; Ku, C.Y.; Psuty, N.P.; Kim D., and Shin, Y.H., 2012. Short-term sedimentation processes and accretion rates in the Sunchon Bay estuarine marsh, South Korea. Spatial variations in sedimentation during individual tidal cycles were investigated using filter traps. The mean mass of sediment deposited in each tidal cycle was higher at the levee edge than at the inner

  • Long-term changes (1953–1990) in the salt marsh

    Long-term vegetation changes in permanent plots along two transects from the low to the high salt marsh at the Boschplaat on Terschelling between 1953 and 1990, were analysed in relation to sedimentation and flooding. In both transects, the number of plant species decreased between 1953 and 1990. In lower parts of the two transects the dominant plant species of the vegetation changed from

  • Enhanced, Climate‐Driven Sedimentation on Salt Marshes

    With Arctic amplification (enhanced polar warming) possibly increasing periods of intense winter freezing and global warming producing more powerful extratropical storms, winter sedimentation on northern salt marshes may likely increase in the future. Here, we show that a large ‐rafting event in northern Massachusetts delivered the equivalent of 15 years of mineral deposition to the marsh

  • The process of sedimentation on the surface of a salt

    01/11/1983· An unditched salt marsh-creek drainage basin (Holland Glade Marsh, Lewes, Delaware) has a sedimentation rate of 0·5 cm year −1. During normal, storm-free conditions, the creek carries negligible amounts of sand and coarse silt. Of the material in the waters flooding the marsh surface, over 80% disappears from the floodwaters within 12 m of the creek. About one-half of the lost material is


    Sedimentation 1 Sedimentation . Sedimentation, or clarification, is the processes of letting suspended material settle by gravity. Suspended material may be particles, such as clay or silts, originally present in the source water. Suspended material or floc is typically created from materials in the water and chemicals used in coagulation or, in other treatment processes, such as lime