Frontal structure of a river plume

Abstract

Garvine and Monk [1974] have contributed to the body of brackish water through the tank. The arrow at the top inknowledge of river plumes. Their results fill in many details of dicates the convergence line of the front. Ahead of this point some earlier work done at our laboratory in which the outflow the brackish (darker) water has increased its thickness. (At the of the Nid river in Trondheimsfjord was treated as a problem , same time, a very thin layer of freshwater that escaped from in hydraulics.The side spreading of the lighter river water acts like a density front for which the (two-dimensional) front velocity computed by means of the Bernoulli equation yields a densimetric Froude number Fr = 2 [Moshagen, 1972]. The degree to which shear stresses enter into the propagation velocity is a matter of speculation. Benjamin [1968] implies that it is important, at least for small-scale laboratory experiments. This is not necessarily true on the length scale associated with large river plumes.Considering the difficulties of measuring the thickness and velocity, which tend to be highly unstationary near a front, the values of 1.7 and 3.3 appear to support the purely dynamical computation. These values have nothing to do with the problem discussed by $tommel and Farmer [1952], as is suggested by Garvine and Monk.The Nid river plume was computed by considering the time history of a cross-sectional slice of the river in a quasi-onedimensional model. By preserving the river momentum and allowing the river to spread sideways with Fr = 2 the width of

Một Số Thí Nghiệm Về Dòng Chảy River Plume

“…Sau ñó, công thức này ñã ñược sử dụng ñể tính toán ñộ sâu tại ñiểm phân tách cho một số vùng cửa sông thực tế với số liệu ño ñạc ñã ñược công bố của các tác giả trên Thế giới tại các sông: Niagara [19], Hudson [20], Connecticut [19,21], Koombana [22].…”

Photoadaptation in marine phytoplankton: variations in ribulose 1,5-bisphos-phate activity

“…Field studies were carried out in late March at a Chesapeake Bay plume front (Boicourt et al 1987). The density structure across the plume varies with river flow, tidal phase and the angle of the transect across the front (Garvine & Monk 1974, Boicourt & Hacker 1976, Boicourt et al 1987. Although the lateral dimensions of the plume were not determined, the density structure presented in the upper panel of Fig.…”

Marine modification of terrestrial influences on Gulf hypoxia: Part II

“…Cabbeling produces vertical velocities that may be thousands of times greater than typical open water values. As distinguished by the extreme upwelling of Loop Current water around the Mississippi River Delta, seawater is advected from depth to replace seawater that mixes with freshwater (Uda, 1938;Garvine and Monk, 1974;Bowman, 1978;Bowman and Iverson, 1978;Pingree et al, 1978;Govoni and Grimes, 1992;Beer, 1997;Hitchcock et al, 1997;Stanton and Ostrovsky, 1998;Moum et al, 2003;Nash and Moum, 2005). These conditions make the Mississippi River Delta area a locus of convergence, cabbeling and subduction of freshwater.…”