Geoscience Reference
In-Depth Information
Fig. 4
Water level values based on stability for every 5 years (1993-2012)
Table 6
Water level values for 18.6 years of observation for LAT system
LAT
MLWS
MLWN
MSL
MHWN
MHWS
HAT
0.000
0.560
1.451
1.792
2.134
3.025
3.510
Table 7 Constituents value
of M2, S2, N2, K2, K1, O1,
P1, Q1 for 18.6 years
observation
Amplitude
Phase
M2
0.786985
359.349945
S2
0.445315
36.221198
N2
0.144344
353.303280
K2
0.124387
50.304571
K1
0.167017
1.768064
O1
0.050599
294.273881
P1
0.050425
354.727930
Q1
0.008412
236.493450
4 Modeling of Tidal Datum
There are a number of tidal lines in littoral zone. In order to delineate the littoral
zone, the location of the tidal line needs to be defined clearly. Tidal line describes
the line of intersection between a specified tidal datum and the foreshore terrain
(Quadros and Collier
2008a
). The tidal datum calculated from the hydrodynamic
model and it involves the computation of the harmonic constituents. The harmonic
constituents from tide observation can be derived using Total Tide Solution
(TOTIS) software.
The model of LAT surfaces has been discussed and derived using various
strategies. LAT will be modelled relative to a geoid, after which the ellipsoid
heights of LAT will be obtained by adding geoid heights to the model LAT values.
