WIND, TIDAL AND WAVES

WIND, TIDAL AND WAVES

In our daily lives the wind so very important, because the wind can cause currents and waves and wind can cause pressure on the ship and port buildings. Just imagine if there is no wind. Waves hit the beach building will cause the forces acting on the building. Tidal has an important role in determining the dimensions of the building, such as breakwaters, docks, mooring buoys, groove depth and harbor waters, and so forth.

WIND, TIDAL AND WAVES

Type of tide in one day by the occurrence of :

1. Daily tidal double (semi-diurnal tide) is within one day there will be twice as high tide and low tide twice with almost the same height and tidal occur sequentially and on a regular basis.
2. Tidal single daily (diurnal tide) is the sole daily tides is only one day only happens once the tide and one low tide. 
3. Tidal inclined to double daily mix (mixed semi diurnal tide prevailing) is on the ebb in one day this happened twice tide and low tide twice, but high and different periods. 
4. Tidal mixture of single-leaning daily (mixed prevailing diurnal tide) is within one day happen once the tide and one low tide, but at the time there will be two times of ups and downs twice with high and very different periods .

DEFINITIONS AND POST-TIDE FULL MOON NEAP TIDAL

Tidal full moon is on every 1st and 15 (new moon and full moon) the position of the earth-moon-sun is roughly on a straight line, so that the tensile strength of the Earth's moon and sun are mutually reinforcing, where high tides very large compared to other days. whereas
Neap tides are at about 7 and 21 in which the position of the moon and sun form a right angle to the earth, so that the tensile strength of the Earth's moon mutually reduce, where high tides small compared with other days.

ELEVATION:

• Highest high water level (highest high water level, HHWL): The highest water when the tides of the full moon or so-called dead.
• Lowest low water level (high-level and lowest low, LLWL): the lowest water during full moon tides or dead moon. 
• Water level (high water level, HWL): The highest water level reached during high tide in the tidal cycle. 
• Low water level (low water level, LWL): position reached the lowest water at low tide in one tidal cycle. 
• Mean high water level (mean high water level, MHWL): the average of the high water level during a period of 19 years. 
• Mean low water level (mean low water levels, MLHL): the average of the low water level over a period of 19 years. 
• Mean sea level (mean sea level, MSL): the mean water level between the mean high water level and low water level rerata.Higher high water level: The highest water from two high water in one day, as in tidal mixed type. 
• Lower low water level high: low water of two low water in a day.

DEFORMATION WAVES:

1. Refraction of waves: the case because of the influence of changes in ocean depths (shallow).
2. Diffraction of waves: the case for the existence of a barrier / barrier, such as breakwaters or island.  
3. Wave reflection: occurs because of or hit a building, which will be reflected in part or in whole. 
4. Breaking waves: the case since spread from place to place in towards increasingly shallow so the waves will gradually break, at a specific location.  

L_0 = 1,56T ^ 2
C = L / T
C_0 = L_0 / T
sin ?? a_1? = C_1 / C_0 sin ?? a_0?
K_r = v (cos ?? a_0? / Cos ?? a_1?)
K_s = v ((n_0 L_0) / (n_1 L_1))
H_1 = K_s K_r H_0
H_A = K ^ 'H_p

SEA WAVE REFLECTION:

Refraction and Diffraction of Waves is a daily phenomenon that we can experience. Here I will discuss the phenomenon of wave refraction and diffraction occurs mainly in the sea. Ocean waves are waves that occur are discussed in the surface, which is one form of energy propagation is usually caused by wind blowing over the ocean (Black, 1986). The nature of the waves coming towards the shore is influenced by the depth of the water and beach profile shape (beach profile), in addition to the parameters and the character of the wave itself. At the time of the wave moves towards the shoreline (shoreline) will occur six events on the wave, which in turn affects the shoreline and surrounding buildings. The sixth event is (McCormick, 1981; Wood and Fleming, 1981):

•  Refraction wave is incident turn direction of motion of the wave peaks due to changes in depth.
• Diffracted wave is incident energy migration along the crest of a wave in the direction of the protected area because there is usually a barrier like an island. 
• Reflection reflection wave is incident wave energy that is usually caused by an area of the building in a seaside location. 
• Wave shoaling is an event enlargement wave height when moving to a place 
• Wave damping is its reduced incident wave energy that is usually caused by friction with the basic beach. 
• more shallow. 
• Wave breaking is incident wave outbreak usually occurs when waves approach the shoreline (surf zone).

Possible so that I can say on this article. Thanks Hopefully Helpful.

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Ditulis oleh Iampsh pada tanggal Friday, 12 December 2014