Geoscience Reference
In-Depth Information
Fig. 2
Tide gauge stations location in Peninsular Malaysia
Table 2 Day of analysis
from the year 2012
Day of analysis
Date
15 Days
1 Jan-15 Jan 2012
1 Month
1 Jan-31 Jan 2012
3 Months
1 Jan-31 Mar 2012
6 Months
1 Jan-30 June 2012
1 Year
1 Jan-31 Dec 2012
Table
3
and Fig.
3
show the tidal datum for Langkawi. Each type of water level
is increasing apparently with long period of observation. The value of tidal datum
is based on zero value of LAT.
Analysis of tidal datum for every 5 years is also based on zero value of LAT.
(Tables
4
and
5
).
Figure
4
show the stability of water level values for every 5 years period.
The water level value of 18.6 years observation has been computed from 15
Dec 1992 to 21 Jun 2011. Water level in harmonic analysis report (Table
6
) for
18.6 years shows that LAT (Zo) is equal to 1.792 m. This indicates that with
longer tide dataset, the tidal datum value is stable and can be accepted as reference
level (Fig.
4
). Table
7
shows the constituents value of M2, S2, N2, K2, K1, O1,
P1 and Q1 for 18.6 years observation in Langkawi Island. Normally long tidal
records are needed to determine amplitude and phase for a larger number of
constituent with high accuracy.
