Kejituan Datum Carta dalam Tempoh Cerapan Pasang Surut: Kajian Kes di Teluk Ewa, Pulau Langkawi (An Accuracy of Chart Datum in the Tidal Observation Period: Case Study for Teluk Ewa, Pulau Langkawi)
Journal Title: Jurnal Kejuruteraan - Year 2015, Vol 27, Issue 1
Abstract
This study elaborates the precision of chart datum at Teluk Ewa, Langkawi Island. Observed tidal data for 19 years at Teluk Ewa tidal station were processed and analyzed using the “RMN Asean Australia Tidal Software” to determine values of chart datum for 19 years observation models (Reference datum), yearly, 6 monthly, 3 monthly and monthly. Datum precisions were tested conforming with International Hydrographic Organization (IHO) Standard. IHO had determined that datum error for special class survey must be less than 5cm and 10cm for first class survey and below. Results showed that the standard deviations (one sigma) for all model of chart datum are less than 10cm, however at two sigma it proved otherwise. The trend of chart datum standard deviation indicated that longer period of observation record better standard deviations. Tides are site specific, therefore holistic approach of the country’s chart datum precision could only be modeled once the studies on all tidal stations are completed.
Authors and Affiliations
Khairul Nizam Abdul Maulud, Zaaim Hasan, Othman A. Karim
Keywords
Related Articles
- EP ID EP417595
- DOI 10.17576/jkukm-2015-27-14
- Views 103
- Downloads 0
Water Quality of Surface Runoff in Loop Two Catchment Area in UKM
For a country that is developing, there is a need to control and maintain the quality of raw water, with adequate quantities to ensure continuous supply of clean water. In Malaysia, urban development activities especiall...
Pemodelan Hubungan Antara Kualiti Perkhidmatan, Kesan Alam Sekitar, Sikap dan Keinginan untuk Menggunakan Park-and-Ride (Modelling of Relationship Between Service Quality, Environmental Impact, Attitude and Intention to Use Park-and-Ride)
Structural equation modelling (SEM) is a modelling technique that can handle a large number of endogenous and exogenous variables, as well as latent variables specified as linear combinations of the observed variables. U...
The Study of Polymer Material Characterisation Using M-Z-N Statistical Analysis Method
This paper proposes an implementation of alternative statistical signal analysis method in characterising material properties of polymer using impulse excitation technique (IET) in accordance with ASTM E1876 standard. Fi...
Application of Membrane Technology towards The Reusability of Lake Water, Mine Water, and Tube Well Water
Severe water shortage caused by El-Nino has caused life-threatening drought conditions globally. This natural disaster has put millions of lives at risk and forcing the people to search for waster. However, the water sca...
Vibration Based Piezoelectric Energy Harvesting Utilizing Bridgeless Rectifier Circuit
The energy harvesting technique has the capability to build autonomous, self-powered electronic systems that does not depend on the battery power for driving the low power electronics devices. In this paper, a voltage do...