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Brackish Water: Where Fresh Water Rivers Meet A Salt Water Sea How does an estuary work? From a physicist’s point of view, the density difference between fresh and salt water makes estuaries interesting When river water meets sea water, the lighter fresh water rises up and over the denser salt water Sea water noses into the estuary beneath the outflowing river water, pushing its way upstream along the bottom Often, as in the Fraser River, this occurs
jc006893 1. . 16 - Woods Hole Oceanographic Institution Southward (down-estuary) winds generate downwelling on the western shore and may tilt the isopycnals toward the vertical direc-tion, reducing stratification On the other hand, moderate northward (up-estuary) winds may flatten isopycnals in cross-channel sections, enhancing stratification in the water column
doi:10. 1016 j. gca. 2004. 10. 024 - Woods Hole Oceanographic Institution The salinity distribution in Figure 2 shows that there is a well-defined subterranean estuary beneath the head of the Bay This subterranean estuary has a narrow seepage face where zero salinity groundwater flows upward to the surface of the beach Sharp salinity gradients exist over short distances in both the vertical and horizontal directions
Subtidal Salinity and Velocity in the Hudson River Estuary . . . A tidally and cross-sectionally averaged model based on the temporal evolution of the quasi-steady Hansen and Rattray equations is applied to simulate the salinity distribution and vertical exchange flow along the Hudson River estuary The model achieves high skill at hindcasting salinity and residual velocity variation during a 110-day period in 2004 covering a wide range of river discharges
Turbulent mixing in a strongly forced salt wedge estuary The goal here is to characterize and quantify turbulent mixing in a tidal salt wedge estuary, including how much mixing occurs, when mixing happens during the tidal cycle, where mixing occurs in the estuary, and what turbulence generation mechanisms are responsible
pH-Dependent iron oxide precipitation in a subterranean estuary Here, we implement a simple reaction network in a 1D reactive transport model (RTM), to investigate the effect of O2 and pH gradients along a flow-line in the subterranean estuary of Waquoit Bay (Cape Cod, Massachusetts) on oxidative precipitation of Fe(II) and subsequent PO4 sorption
Episodic and Long-Term Sediment Transport Capacity in The Hudson River . . . Abstract A tidally averaged model of estuarine dynamics is used to estimate sediment transport in the Hudson River estuary over the period 1918 to 2005 In long-term and seasonal means, along-channel gradients in sediment flux depend on the estuarine salinity gradient and along-channel depth profile Lateral depth variation across the estuary affects the near-bottom baroclinic circulation and
Ocean Zones - Woods Hole Oceanographic Institution The ocean water column is made up of five zones: the sunlight (epipelagic), twilight (mesopelagic), midnight (bathypelagic), abyssal (abyssopelagic) and hadal zones (trenches)
doi:10. 1016 j. gca. 2005. 10. 019 - Woods Hole Oceanographic Institution The small and confined nature of the sub-terranean estuary in Waquoit Bay allows these two papers to provide an in-depth study of the major biogeochemical reactions operating on the permeable sediments of a coast-al aquifer with active Fe and Mn redox cycles and well-de-fined salinity gradients