currents). The fine and very fine sands compose more than 90%. In the northern and
southern areas very fine sand evinces higher percentages than 70%. In the central
and breakwater areas the grading categories of very fine sand have a balanced
accumulation up to depths of 1 to 3 m. The average diameter has a smaller range of
variation between 0.10 and 0.15 mm. The degree of sorting is well and very well,
asymmetry ranging from very fine to very coarse (breakwater area) and kurtosis is
from very leptocurtic to leptocurtic (Table 8.3).
8.3.4 Nearshore Area
In the nearshore area the seaward limit is set at the depth where wave “feels” the
seabed, which is variable depending on sea conditions and where basically no
substantial changes in the submerged relief are occuring. During storms this
depth can be located (Bay Mamaia) between depths of 8 to10 m at distances from
Table 8.1 The sediment texture in the backshore area
Transect
Sand
Mean
Sorting
Skewness
Kurtosis
MM1
Medium
0.30
Very poorly
Symmetrical
Platycurtic
Medium
0.25
Poorly
Very coarse
Very platycurtic
MM2
Fine
0.13
Moderately
Very coarse
Extremy
Medium
0.38
Poorly
Very coarse
Very platycurtic
MM3
Fine
0.13
Very well
Very coarse
Platycurtic
Fine
0.17
Poorly
Very coarse
Very platycurtic
MM4
Fine
0.22
Poorly
Very coarse
Very platycurtic
Coarse
0.62
Very poorly
Coarse
Platycurtic
MM5
Fine
0.22
Poorly
Very coarse
Mesocurtic
Coarse
0.58
Poorly
Coarse
Platycurtic
MM6
Fine
0.20
Moderately
Very coarse
Mesocurtic
Fine
0.20
Moderately
Very coarse
Mesocurtic
MM7
Fine
0.20
Moderately
Very coarse
Mesocurtic
Fine
0.22
Poorly
Very coarse
Leptocurtic
Table 8.2 The sediment texture in the swash area
Transect
Sand
Mean
Sorting
Skewness
Kurtosis
MM1
Very fine
0.12
Very well
Very coarse
Leptocurtic
MM2
Medium
0.38
Poorly
Very coarse
Very platycurtic
MM3
Medium
0.39
Very poorly
Very coarse
Very platycurtic
MM4
Coarse
0.74
Poorly
Fine
Leptocurtic
MM5
Very coarse
1.2
Poorly
Very fine
Very platycurtic
MM6
Fine
0.17
Moderately
Very coarse
Very leptokurtic
MM7
Very fine
0.13
Very well
Very coarse
Very leptocurtic
8 Granulometry of Sediments in the Mamaia Bay Area
137
southern areas very fine sand evinces higher percentages than 70%. In the central
and breakwater areas the grading categories of very fine sand have a balanced
accumulation up to depths of 1 to 3 m. The average diameter has a smaller range of
variation between 0.10 and 0.15 mm. The degree of sorting is well and very well,
asymmetry ranging from very fine to very coarse (breakwater area) and kurtosis is
from very leptocurtic to leptocurtic (Table 8.3).
8.3.4 Nearshore Area
In the nearshore area the seaward limit is set at the depth where wave “feels” the
seabed, which is variable depending on sea conditions and where basically no
substantial changes in the submerged relief are occuring. During storms this
depth can be located (Bay Mamaia) between depths of 8 to10 m at distances from
Table 8.1 The sediment texture in the backshore area
Transect
Sand
Mean
Sorting
Skewness
Kurtosis
MM1
Medium
0.30
Very poorly
Symmetrical
Platycurtic
Medium
0.25
Poorly
Very coarse
Very platycurtic
MM2
Fine
0.13
Moderately
Very coarse
Extremy
Medium
0.38
Poorly
Very coarse
Very platycurtic
MM3
Fine
0.13
Very well
Very coarse
Platycurtic
Fine
0.17
Poorly
Very coarse
Very platycurtic
MM4
Fine
0.22
Poorly
Very coarse
Very platycurtic
Coarse
0.62
Very poorly
Coarse
Platycurtic
MM5
Fine
0.22
Poorly
Very coarse
Mesocurtic
Coarse
0.58
Poorly
Coarse
Platycurtic
MM6
Fine
0.20
Moderately
Very coarse
Mesocurtic
Fine
0.20
Moderately
Very coarse
Mesocurtic
MM7
Fine
0.20
Moderately
Very coarse
Mesocurtic
Fine
0.22
Poorly
Very coarse
Leptocurtic
Table 8.2 The sediment texture in the swash area
Transect
Sand
Mean
Sorting
Skewness
Kurtosis
MM1
Very fine
0.12
Very well
Very coarse
Leptocurtic
MM2
Medium
0.38
Poorly
Very coarse
Very platycurtic
MM3
Medium
0.39
Very poorly
Very coarse
Very platycurtic
MM4
Coarse
0.74
Poorly
Fine
Leptocurtic
MM5
Very coarse
1.2
Poorly
Very fine
Very platycurtic
MM6
Fine
0.17
Moderately
Very coarse
Very leptokurtic
MM7
Very fine
0.13
Very well
Very coarse
Very leptocurtic
8 Granulometry of Sediments in the Mamaia Bay Area
137