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Table 9.12 Evaluation of the integral attenuation of light
ʲ
(m
−
1
) at the depth of 1 m under zenith
angle of the Sun 75
°
for different reservoirs of South Vietnam
Substance
Spectral channel
1
2
3
4
5
6
7
Pure water
0.121
0.109
0.078
0.117
0.121
0.134
0.038
Oil
0.431
0.482
0.391
0.217
0.189
0.009
0.074
Dissolved organic matter
0.033
0.027
0.015
0.183
0.309
0.295
0.177
Weighed matter
0.197
0.264
0.333
0.284
0.271
0.255
0.243
Chlorophyll-a
0.088
0.171
0.106
0.112
0.103
0.122
0.101
Yellow matter
0.123
0.112
0.109
0.065
0.064
0.063
0.059
Biogenic salts
0.172
0.181
0.164
0.183
0.179
0.159
0.147
Object for study is Saigon River in Ho Chi Minh City area
final product as the evaluation of physical-chemical characteristics of the water
environment using models gives its spatial and dynamic distributions. The adaptive
identi
er takes into account both physical and ecological processes of the water
characteristic transformations. In fact, the following equation is used to describe the
dynamics of chemical substance B:
z
¼ Q
B
X
n
2
B
@u
2
B
@w
2
B
@
@
B
t
þ #
u
@
B
@u
þ #
w
@
B
@w
þ #
z
@
B
@
H
i
B
þ v
u
@
2
þ v
w
@
2
þ v
z
@
z
2
ð
9
@
i¼1
:
5
Þ
is the current velocity, z is
where
φ
is the latitude,
ʻ
is the longitude, vv
u
;
v
k
;
v
z
ˇ
the water depth,
is the turbulence factor, Q
B
is the anthropogenic and natural
sources of element B
H
i
B
is the element B transformation process due to gravita-
tional settling (i = 1), transfer to the food pyramid (i = 2), decomposition under the
effect of microorganisms (i = 3), oxidizing process (i = 4), evaporation (i = 5), entry
into neutral chemical compounds (i = 6), biosedimentation (i = 7) and other pro-
cesses (i = 8).
Equation (
9.5
) is speci
;
ed taking into consideration the condition on the uniform
distribution of the water quality at the depth z within a limited volume. The entire
water volume is divided into volumes
Du Dk D
z. The
fl
ow Q
B
is divided into
fl
ow of the
chemical element Bi
i
derived from anthropogenic source kk-type, bordering water
reservoir, and due to the coast drainage of ss-type, respectively. The functional
RUNS (ss,i) is based on the data shown in the Table
9.13
. The GIMS database
contains series of the runoff coef
flows POL (kk,i), MARINE (i) and RUNS (ss,i) that characterize the in
fl
cients depending on the soil groups and slopes.
Considering this discretization procedure the Eq. (
9.5
) is changed by the system of
the
Tables
9.14
and
9.15
show results of the water quality control. The Adaptive
Identi
er that is preliminary educated allows the physical-chemical characteristics
assessment in their dynamics. The reconstruction error is no more than 7 %.
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