The extent of sampling dépends on the importance of littoral materials
as related to the total engineering problem. The sampling program should
specify:
(a) horizontal location of sample,
(b) spacing between samples,
(c) volume of sample,
(d) vertical location and type of sampled volume (e.g. surface layer
or vertical core),
(e) technique for sampling,
(f) method of storing and documenting the sample.
Beaches typically show more variation across the profile than along
the shore, so sampling to détermine variation in the littoral zone should
usually be along a line perpendicular to the shoreline.
For reconnaissance sampling, a sample from both the wetted beach face
and from the dunes is recommended. More extensive samples could be obtained at constant spacings across the beach or at different locations on
the beach profile. Spacings between sampling lines are determined by the
variation visible along the beach or by statistical techniques.
Many beaches hâve subsurface layers o pe
vertical
If this material will affect the engineering pro
,
borings should be made to obtain samples at ep
material.
holes or
analysis,
Sample volume should be adéquate o
analysis, smaller quantiabout 50 grams are required; for settling
r,PPaed if other studies are
ties will suffice, but at least 50 grams
adéquate for most uses,
required later. À quarter of a cup is more than adequa
«n beaches. However, for engmeerSand often occurs in fine laminae
sampie individual laminae of
ing applications it is rarely necessary
take
equidimensional
sand. It is easier and more representa
.
e at CERC suggests that
sample that cuts^ across many laminae.
P o£ sample covering a few inc e
any method of obtaining an adéquate v
Cores should be taken w er
in depth usually gives satisfactory re
pile foundations are planned.
.
The sample is only as good as th® ^ec^ded^t the time of
following minimum information shou
remarks, and initia s o
,
locality, date and time, position on^C^ersanple, which is best ensured
lector. This information must stay
oiacing it inside the c°nta
by fixing it to the sample container ° PJabel may deteriorate due to
Unless précautions are taken, the s poved labels resuit y o
noisture, abrasion, or other causes.
4-25
as related to the total engineering problem. The sampling program should
specify:
(a) horizontal location of sample,
(b) spacing between samples,
(c) volume of sample,
(d) vertical location and type of sampled volume (e.g. surface layer
or vertical core),
(e) technique for sampling,
(f) method of storing and documenting the sample.
Beaches typically show more variation across the profile than along
the shore, so sampling to détermine variation in the littoral zone should
usually be along a line perpendicular to the shoreline.
For reconnaissance sampling, a sample from both the wetted beach face
and from the dunes is recommended. More extensive samples could be obtained at constant spacings across the beach or at different locations on
the beach profile. Spacings between sampling lines are determined by the
variation visible along the beach or by statistical techniques.
Many beaches hâve subsurface layers o pe
vertical
If this material will affect the engineering pro
,
borings should be made to obtain samples at ep
material.
holes or
analysis,
Sample volume should be adéquate o
analysis, smaller quantiabout 50 grams are required; for settling
r,PPaed if other studies are
ties will suffice, but at least 50 grams
adéquate for most uses,
required later. À quarter of a cup is more than adequa
«n beaches. However, for engmeerSand often occurs in fine laminae
sampie individual laminae of
ing applications it is rarely necessary
take
equidimensional
sand. It is easier and more representa
.
e at CERC suggests that
sample that cuts^ across many laminae.
P o£ sample covering a few inc e
any method of obtaining an adéquate v
Cores should be taken w er
in depth usually gives satisfactory re
pile foundations are planned.
.
The sample is only as good as th® ^ec^ded^t the time of
following minimum information shou
remarks, and initia s o
,
locality, date and time, position on^C^ersanple, which is best ensured
lector. This information must stay
oiacing it inside the c°nta
by fixing it to the sample container ° PJabel may deteriorate due to
Unless précautions are taken, the s poved labels resuit y o
noisture, abrasion, or other causes.
4-25