Indian Standard CODE OF PRACTICE FOR PLANNING AND DESIGN OF PORTS AND HARBOURS

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GENERAL
2.1 A brief description of the site including its latitude, longitude, geographical
location, accessibility, etc, should be given.
the area, purpose of the project,
Historical background of
also be briefly described.
type of hinterland and communications may
2.2 Available Information -Wherever possible, advantage should be
taken of existing local data on tides, storms, wave heights, littoral drifts,
mud banks, etc, and records of previous investigations in the vicinity and
information compiled. The behavidur of existing structures which may
be of similar nature to the ones proposed, and the influence of the soil and
water on the materials of construction should be studied and recorded,
At such places, site exploration, soil investigation and the examination of the
materials of construction may be limited to confirm the site data that may
be expected in the neighbourhood of proposed work. *
3. SURVEY
3.1 Topographical survey of adequate area covered by the project is the first
reqtiirement and should be obtained at the earliest. Survey maps of
‘scale 1 : 50000 and contour interval of 20 m are required for general
planning The recommended scales for survey maps for detailed planning
are 1 : 5 000, 1 : 2 500 and 1 : 1250 with contour interval of one metre. In no
case shall the survey maps for detailed planning be of scale less than 1 I 5 000
with contour interval of one metre, depending however on topography of the
area.


4.2 Winds -For preliminary studies, information may be obtained froin
the available meteorological recordsof the area. Recording of velocity and
direction of wind at the proposed site shall be obtained by installing continuous
and self-recording anemometers. The data shall be collected for at least
a period of one year and shall also be correlated with fhe data available at
places nearest to the site. From the data so collected wind roses should be
prepared for each month in the form given in Fig, 1 and presented as shown
in Fig. 2.
4.3 Cyclones - Information should be compiled regarding track of cyclones.
The velocity of maximum winds, radius of maximum wind velocity, duration,
pressure drop at ‘the cyclone centre and speed of movement of cyclone centre
is required*. From this a design cyclone is adopted and waves that could
,_be incident at a place computed.