| Summary: | Ocean tidal information is very important for Indonesia as a country with the wide
marine waters. Tidal information is generally obtained out of the tide stations that their
number are relatively smaller compared with the total length of shoreline in Indonesia
and are generally located in ports. Another way to get the tidal information is using
global tide models that can model the tides at any location in the world ocean waters.
One of the available tide models is a global tide models developed in 2003 by Oregon
State University (OSU), United States, namely the global tide models TPXO 7.1 that is
assimilating altimetry data from TOPEX/Poseidon and inversion methods. TPXO 7.1
models can be run with the software Tidal Model Driver (TMD). TMD can be used to
extract the tidal constants and to predict the height of tide at sea level from tide models.
The research is intended to explore the potential of TMD in modeling tidal waters of the
island of Java with TPXO 7.1 models and determine the accuracy of the data generated
by the model.
Research includes prediction of tidal elevation and extraction constants of tidal
waters at several locations on the island of Java, using models TPXO 7.1and software
TMD. The output data from the model which are tidal elevation and tidal constants data
then compared with the observational data to test the quality of the data. Observational
data is the tidal elevation data from the International Oceanography Commission (IOC)
and the tidal constants data from Dinas Hidro-Oseanografi (DISHIDROS). Analysis is
done by comparing the tidal elevation data predicted by models with the tidal elevation
data obtained by IOC and calculate the value of RMSE(Root Mean Square Error).
Similar step applied to evaluatethe tidal constant data extracted bymodel with
comparable data from DISHIDROS .
The results showed that the elevation data predicted by model are close to the
elevation data observed byIOC with a relatively small mean value of RMSE, amounting
to 0,105 m. The comparison of the data of tidal constants data extracted from the model
with a constant tidal observed by DISHIDROS shows the mean of amplitude RMSE
values are quite small, that is equal to 4.067 cm, while the mean value of phase RMSE is
quite large, amounting to 42.247o.
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