8/16/2019 Hydrographic Surveying Are Carried Out for One or More of the Following Activities

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Hydrographic surveying are carried out for one or

more of the following activities.

Determination of Tide

• Measurement of tides for sea coast work

Determination of Depth

• For navigation

• Bathimatric Survey

• Location of rocks, sand bars, navigation light

Determination of direction

•  The location of sewer any pipe or channel that carry waste water out falls

• Measuremenment of !uantity of water and "ow of water in connection of water

schemes, #ower scheme and "ood controls

Why we need Hydrographic Surveys - Uses &Applications of Hydrographic Survey

$ %&shore engineering and the shipping industry have continued to e'pand

( Drilling rigs )e'tracting oil, gas etc from deep sea* locating up to $(+mileso&shore, search for resources particularly oil and gas

%&shore islands are constructed of dredged material )to bring material formsome where and dump there* to support marine structure

- .arbor depth up to /0 is re!uired to accommodate larger ships and tankers

+ 1ontaineri2ation has become an e3cient and preferred method of cargohandling

4 The demand for recreational transportation ranges form large pleasure cruiseships to small sail bonds

5 1ruise ships to small sail bonds .ydrographic surveys are made to a !uire andpresent data on oceans, lakes and harbors 6t comprises all surveys made for

o  The determination of shore lines, soundings )measurement of depth below

the water level* characteristics of bottoms, areas sub7ected to Suring andsilting, depth available for navigation and velocity as well ascharacteristics of "ow of water

o  The location of lights rocks sand balls, buoys ) anything that "oats on thesurface of water*

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