Tidal Basin

Tidal Energy A source of power derived from the movement of waves. Tidal energy traditionally involves erecting a dam across the opening to a tidal basin. The dam includes a sluice that is opened to allow the tide to flow into the basin the sluice is then closed, and as the sea level drops, traditional hydropower technologies can be used to generate electricity from the elevated water in the basin. 

To provide steady flow of seawater through the recovery beds during the twice-daily change of tides, an elaborate system of tidal basins, dikes, and sea gates is required, responsible for two-thirds of the plant s high cost. 

RWS, The Closure of Tidal Basins, Rijkswaterstaat (The Delft University Press, Delft, 1987). 

If SLR forces positive accommodation in flood-dominant basins, surf zone generated sediment transport will be diverted into the tidal basin by flood currents. These sediments will be trapped in the flood delta. Typical barrier length scales are O (10 km). Therefore, typical values for shoreline changes in the vicinity of backbarrier sinks can be estimated as shown in Table 37.4. 

The characteristics of coastline response to SLR suggested by the Bruun rule seem conceptually correct. However, under present near-stUl-stand SLR conditions, the Bruun effect can easily be subordinate to a host of other processes. Therefore, any good comparisons between shoreline recessions measured in the last century under near-still-stand SLR and corresponding Brmm rule predictions are likely to be fortuitous and cannot be considered as conclusive verification of the Bruun rule. Furthermore, due to the many restrictive assumptions associated with the Bruun rule, it is not applicable in most natural environments, as exemplified by the exclusion by Zhang et al. of almost 70% of the study area from their analysis. The applicability of the Bruun rule is particularly compromised in the vicinity of tidal basins associated with inlets as the Bruun effect can be overridden when the basin area is larger than fOkm. ... 

M. J. F. Stive and Z. B. Wang, Morphodynamic modeling of tidal basins and coastal inlets, Advances in Coastal Modeling, ed. C. Lakhan (Elsevier, 2003), Chapter 13, pp. 367-392. 

Equalizing basin A holding basin in which variations in flow and composition of liquid are averaged. Such basins are used to provide a flow of reasonably uniform volume and composition to a treatment unit. Also called a balancing reservoir. Estuaries Bodies of water which are located at the lower end of a river and are subject to tidal fluctuations. 

Callisto orbits Jupiter at a distance of 1.9 million kilometres its surface probably consists of silicate materials and water ice. There are only a few small craters (diameter less than a kilometre), but large so-called multi-ring basins are also present. In contrast to previous models, new determinations of the moon s magnetic field suggest the presence of an ocean under the moon s surface. It is unclear where the necessary energy comes from neither the sun s radiation nor tidal friction could explain this phenomenon. Ruiz (2001) suggests that the ice layers are much more closely packed and resistant to heat release than has previously been assumed. He considers it possible that the ice viscosities present can minimize heat radiation to outer space. This example shows the complex physical properties of water up to now, twelve different crystallographic structures and two non-crystalline amorphous forms are known Under the extreme conditions present in outer space, frozen water may well exist in modifications with as yet completely unknown properties. 

Figure 6.5 Distinct differences in transport behavior between pools of surface and bottom floes over several tidal cycles, as determined by R0 values, in the ACE Basin (USA). Hatched areas are times of maximum current speed. ws = sediment settling velocity, 0 = proportionality coefficient between eddy viscosity and diffusivity, k = von Karman s constant, and n = frictional velocity. (From Milligan et al., 2001, with permission.)...

Tidal sea level oscillations. In the Black Sea, tides are formed under the action of the tidal forces in the basin proper, which is limited in size therefore, the tides are small. Over the entire sea area, tides feature a semidiurnal or irregular semidiurnal character. The prevalence of this type of tides is related to the closeness of the semidiurnal period to that of the first mode of free oscillations in the Black Sea (uninodal seishe). 

X 10" acres of tidal and nontidal wetlands are to be restored by 2010. Also, by 2012, the rate of urban sprawl development of forest and agricultural land in the Chesapeake Bay drainage basin is to be reduced by 30% from the average over 1992-1997. It is too early to determine the level of success achieved by the efforts to clean up Chesapeake Bay. 

In contrast to the coastal regime, which is unstratified most of the year because of wind and tidal mixing, the middle shelf is thermally stratified much of the year. The outer shelf, principally St. George Basin (Figure 1), is characterized by salinites... 

Seawater, available at the premises of the Royal Netherlands Navy s Chemical Laboratory, was sub-sampled. This coastal seawater was initially collected at about lOm water depth, in the nearby tidal channel (Marsdiep). The water passed a sand filter directly after collection, in order to remove larger particles and organisms. About lOm seawater was thus collected in a glass-fibre tank and transported to the TNO Laboratory for Applied Marine Research, at Den Helder, where it was contained in a concrete basin, treated with a metal-free paint. In this basin the suspended particulate matter was allowed to settle for 4 weeks. This water served as source material for the candidate CRM, and had a salinity of 28 %o. 

October 2005 Western basin SBElOplus, eight stations Potok-2M + tidal gauge, one mooring... 

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