Tidal Analysis

Is the tidal sea level fluctuations as a function of time because of the gravity objects in the sky, especially the sun and moon on the water mass on earth. Although the month of mass much closer, then the influence of gravity to the earth the moon is bigger than the influence of gravity of the sun.

Knowledge is very important tide in the harbor planning. Elevation of the highest water level (tide) and lowest (low tide) is very important to plan for the port buildings. For example, the peak elevation of the building the breakwater, dock, etc.. Front elevation is determined by the tide, while the depth of the cruise line / port specified by the face I \ waters recede. High tide is the vertical distance between high water (tide peak) and water lowest (valley low tide) is a sequence. Tidal period is the time required from the position of water level on the average water level to the same position the next. Tidal period could 12 hours 25 minutes or 24 hours 50 minutes, depending on the type of ups and downs. Period of rising water on the face called pairs, was at the time called the ebb down sir. Variations of a current water level is called the tidal currents, water mass carrying very large amounts. High tide occurs at the time period and flow ebb tide occurred at low tide period. The turning point (slack) is where the flow turns the tide ebb and flow. These turning points can occur at the highest water level and the lowest water level. At the current velocity is zero.

Tide forms in various regions are not the same. In an area in one day could happen once the tide. In general tide in various regions can be distinguished four types, namely single daily tidal (diurnal tide), the daily double (semidiurnal tide) and two kinds of mixtures.

1. Single daily tides (diurnal tide)
In one day happen once the tide and one low tide with tidal period is 24 hours 50 minutes. This type of tide occurred in the waters of the strait Karimata.

2. Double the daily tides (semi-diurnal tide)
In one day happens twice tide and low tide twice with similar ringgi and tides occur on a regular basis, respectively. Type tidal average is 12 hours 24 minutes. This type of tide is in the Malacca Strait to the Andaman Sea.

3. Mixture tidal inclined to double daily (mixed semidiurnal tide tide prevelailing)
Happen in one day the tide twice and both times the water receded, but the high and the period is different. This kind of tidal many diperairan Eastern Indonesia.

4. Mixed tidal biased toward a single daily (mixed diurnal tide tide prevelailing)