scholarly journals Rapid changes in river plume dynamics caused by advected wind‐driven coastal upwelling as observed in Lake Geneva

2021 ◽  
Author(s):  
Frédéric Soulignac ◽  
Ulrich Lemmin ◽  
Seyed Mahmood Hamze Ziabari ◽  
Htet Kyi Wynn ◽  
Benjamin Graf ◽  
...  
Keyword(s):  
Coastal Upwelling ◽  
River Plume ◽  
Lake Geneva ◽  
Plume Dynamics ◽  
Rapid Changes

Breaking Surface Wave Effects on River Plume Dynamics during Upwelling-Favorable Winds

2013 ◽  
Vol 43 (9) ◽  
pp. 1959-1980 ◽  
Author(s):  
Gregory P. Gerbi ◽  
Robert J. Chant ◽  
John L. Wilkin
Keyword(s):  
Gravity Waves ◽  
Wave Breaking ◽  
Deep Ocean ◽  
River Plume ◽  
Sea Floor ◽  
Plume Dynamics ◽  
Surface Gravity Waves ◽  
Shear Dispersion ◽  
Wave Effects ◽  
Critical Richardson Number

Abstract This study examines the dynamics of a buoyant river plume in upwelling-favorable winds, concentrating on the time after separation from the coast. A set of idealized numerical simulations is used to examine the effects of breaking surface gravity waves on plume structure and cross-shore dynamics. Inclusion of a wave-breaking parameterization in the two-equation turbulence submodel causes the plume to be thicker and narrower, and to propagate offshore more slowly, than a plume in a simulation with no wave breaking. In simulations that include wave breaking, the plume has much smaller vertical gradients of salinity and velocity than in the simulation without breaking. This leads to decreased importance of shear dispersion in the plumes with wave breaking. Much of the widening rate of the plume is explained by divergent Ekman velocities at the off- and onshore edges. Some aspects of plume evolution in all cases are predicted well by a simple theory based on a critical Richardson number and an infinitely deep ocean. However, because the initial plume in these simulations is in contact with the sea floor in the inner shelf, some details are poorly predicted, especially around the time that the plume separates from the coast.

Analysis of the Niagara River plume dynamics

1992 ◽  
Vol 97 (C2) ◽  
pp. 2403 ◽  
Author(s):  
Ann K. Masse ◽  
C. R. Murthy
Keyword(s):  
River Plume ◽  
Niagara River ◽  
Plume Dynamics

Modeling the Nestos River plume dynamics using ELCOM

2011 ◽  
Vol 33 (1-3) ◽  
pp. 22-35 ◽  
Author(s):  
N. Kamidis ◽  
G. Sylaios ◽  
V.A. Tsihrintzis
Keyword(s):  
River Plume ◽  
Plume Dynamics ◽  
Nestos River

Nearfield development of the negatively buoyant Rhône River inflow into Lake Geneva as an interflow: suspended particulate matter and associated fluxes.

2021 ◽  
Author(s):  
Violaine Piton ◽  
Frédéric Soulignac ◽  
Ulrich Lemmin ◽  
Graf Benjamin ◽  
Htet Kyi Wynn ◽  
...  
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Suspended Particulate Matter ◽  
Fine Particles ◽  
River Plume ◽  
Lake Geneva ◽  
Suspended Particulate ◽  
Negatively Buoyant

<p>River inflows have a major influence on lake water quality through their input of sediments, nutrients and contaminants. It is therefore essential to determine their pathways, their mixing with ambient waters and the amount and type of Suspended Particulate Matter (SPM) they carry. Two field campaigns during the stratified period took place in Lake Geneva, Switzerland, in the vicinity of the Rhône River plume, at high and intermediate river discharge. Currents, water and sediment fluxes, temperature, turbidity and particle size distribution were measured along three circular transects located at 400, 800 and 1500 m in front of the river mouth. During the surveys, the lake was thermally stratified, the negatively buoyant Rhône River plume plunged and intruded into the metalimnion as an interflow and flowed out in the streamwise direction. Along the pathway, interflow core velocities, SPM concentrations and volumes of particles progressively decreased with the distance from the mouth (by 2-3 times), while interflow cross sections and plume volume increased by 2-3 times due to entrainment of ambient water. The characteristics of the river outflow determined the characteristics of the interflows: i.e. interflow fluxes and concentrations were the highest at high discharge. Both sediment settling and interflow dilution contributed to the observed decrease of sediment discharge with distance from the mouth. The particle size distribution of the interflow was dominated by fine particles (<32 μm), which were transported up to 1500 m away from the mouth and most likely beyond, while large particles (>62 μm) have almost completely settled out before reaching 1500 m. </p>

scholarly journals The influence of river plume dynamics on trace metal accumulation in calanoid copepods

2010 ◽  
Vol 55 (6) ◽  
pp. 2487-2502 ◽  
Author(s):  
Derek D. Wright ◽  
Thomas K. Frazer ◽  
John R. Reinfelder
Keyword(s):  
Trace Metal ◽  
Metal Accumulation ◽  
River Plume ◽  
Calanoid Copepods ◽  
Plume Dynamics

scholarly journals Satellite‐based empirical models linking river plume dynamics with hypoxic area and volume

2016 ◽  
Vol 43 (6) ◽  
pp. 2693-2699 ◽  
Author(s):  
Chengfeng Le ◽  
John C. Lehrter ◽  
Chuanmin Hu ◽  
Daniel R. Obenour
Keyword(s):  
Empirical Models ◽  
River Plume ◽  
Plume Dynamics ◽  
Hypoxic Area ◽  
Area And Volume
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