182
H.A.T. - 6.41 m,
M.S.L. - 3.00 m,
M.H.W.S. - 5.28 m,
M.L.W.N. - 1.94 m,
M.H.W.N. - 4.06 m
M.L.W.S. - 0.72 m
5. Tides
Predicted water levels sometimes differ from the observed levels. Variations
from the predicted heights are caused mainly by strong and prolonged winds or
by unusually high or low barometric pressure (see Sect. 3.8). Coastal currents
and waves also interact with the coastal topography and produce local gradients
on the sea surface. Observed mean sea level at one site may be higher (or lower)
compared with corresponding levels a few kilometres away along the coast or
outside a harbour.
In the coastal zone, in estuaries, salt marshes and mangrove swamps, the
development of ecosystems is strongly influenced by the changes of tidal levels
and the rhythms they imposed in terms of submersion and exposure to the air,
resulting temperature and salinity changes, sediment movements and nutrients
fluxes. These and other influences of tides on living organisms will be discussed
in Chap. 14.
H.A.T. - 6.41 m,
M.S.L. - 3.00 m,
M.H.W.S. - 5.28 m,
M.L.W.N. - 1.94 m,
M.H.W.N. - 4.06 m
M.L.W.S. - 0.72 m
5. Tides
Predicted water levels sometimes differ from the observed levels. Variations
from the predicted heights are caused mainly by strong and prolonged winds or
by unusually high or low barometric pressure (see Sect. 3.8). Coastal currents
and waves also interact with the coastal topography and produce local gradients
on the sea surface. Observed mean sea level at one site may be higher (or lower)
compared with corresponding levels a few kilometres away along the coast or
outside a harbour.
In the coastal zone, in estuaries, salt marshes and mangrove swamps, the
development of ecosystems is strongly influenced by the changes of tidal levels
and the rhythms they imposed in terms of submersion and exposure to the air,
resulting temperature and salinity changes, sediment movements and nutrients
fluxes. These and other influences of tides on living organisms will be discussed
in Chap. 14.