Applied Water Science,
Journal Year:
2023,
Volume and Issue:
13(4)
Published: March 23, 2023
Abstract
Deterioration
of
water
quality
lakes
and
reservoirs
has
become
major
global
concerns
that
impose
serious
environmental
impacts
for
both
aquatic
terrestrial
environments.
In
the
current
study,
many
parameters
like
temperature
(Temp),
electric
conductivity
(EC),
dissolved
oxygen
(DO),
turbidity
(TU),
pH,
biological
demand
(BOD),
chemical
(COD),
total
alkalinity
(TA),
solids
(TDS),
organic
carbon
(TOC),
nitrate(NO
3
−
),
phosphate
(PO
4
3−
)
chlorophyll
a
(chl-a)
were
determined.
The
study
covered
Angereb
reservoir
its
tributaries
on
monthly
basis
from
January
to
March
2019
at
five
sampling
stations
in
accordance
with
APHA
2017
guide
lines
physicochemical
analysis.
values
all
investigated
parameters,
except
DO
(at
AU,
AD,
KU
KD),
COD
TU,
below
maximum
permissible
limits
set
by
WHO.
Thus,
findings
DO,
TU
demonstrated
remedial
actions
should
be
taken
improve
tributaries.
Multivariate
statistical
methods
(PCA
CA)
applied
detect
spatial
temporal
variations
parameter.
first
three
principal
components
enough
develop
PCA
score
plot
which
explained
about
71.32%
variance
dataset.
CA
have
provided
similar
information;
grouped
24
samples
into
significant
clusters
showing
but
minimal
observed
within
collected
period
site.
BOD,
moderately
positively
loaded
space
component
found
associated
each
other,
whereas
EC
TDS
shown
moderate
negative
loading
other.
This
suggested
useful
tools
monitoring
controlling
selected
surface
water.
CLEAN - Soil Air Water,
Journal Year:
2017,
Volume and Issue:
45(3)
Published: Jan. 13, 2017
Heavy
metal
pollution
in
surface
water
of
four
lakes
(Naivasha,
Elementaita,
Nakuru,
and
Bogoria)
the
Great
Rift
Valley
Kenya,
East
Africa
was
investigated
this
study.
Eight
heavy
metals
including
chromium
(Cr),
nickel
(Ni),
copper
(Cu),
zinc
(Zn),
arsenic
(As),
lead
(Pb),
cadmium
(Cd),
mercury
(Hg)
were
determined
using
inductively
coupled
plasma‐mass
spectrometer
(ICP‐MS).
Among
tested
metals,
Cd
Hg
detected
all
samples.
The
concentrations
Cr,
Cd,
Ni,
Pb
relatively
lower
than
those
other
lakes.
Results
Kohonen
self‐organizing
map
indicated
that
sampling
sites
Kenya
could
be
classified
into
three
different
groups
based
on
pollution.
Lake
Naivasha
Nakuru
had
characteristics
low
Cu,
As,
Hg.
Bogoria
characterized
by
high
levels
Hg,
Pb,
Zn,
As.
Elementaita
showed
As
Cd.
Source
identification
principal
component
analysis
(PCA)
anthropogenic
factor
played
an
increasingly
important
role
Africa.
Analysis
non‐carcinogenic
health
risks
may
pose
adverse
effects
to
local
residents
via
ingestion
route.
Royal Society Open Science,
Journal Year:
2018,
Volume and Issue:
5(1), P. 170624 - 170624
Published: Jan. 1, 2018
As
part
of
the
efforts
to
ensure
adequate
supply
quality
water
from
Danjiangkou
Reservoir
Beijing,
surface
samples
were
taken
tributaries
in
normal
(May),
flood
(August)
and
dry
(December)
seasons
2014,
characterized
for
nitrogen
phosphorus
contents
as
specified
applicable
standards.
Test
results
indicated
that
(i)
organic
pollution
Sihe
Shendinghe
rivers
was
more
serious
than
those
other
tributaries,
concentrations
favoured
growth
most
algae;
(ii)
total
(TP),
(TN)
dissolved
inorganic
(DIN)
forms
(DTP),
(DTN)
nitrate
[Formula:
see
text],
respectively,
these
seasons;
(iii)
compared
with
nitrogen,
likely
block
an
overrun
phytoplankton;
(iv)
TN,
TP,
permanganate
index
(CODMn)
ions
positively
correlated.
These
findings
are
helpful
government
develop
effective
measures
protect
source
Danjingkou
pollution.
International Journal of Environmental Research and Public Health,
Journal Year:
2015,
Volume and Issue:
12(7), P. 7839 - 7855
Published: July 10, 2015
Storm
runoff
events
in
the
flooding
season
affect
water
quality
of
reservoirs
and
increase
risks
to
supply,
but
coping
strategies
have
seldom
been
reported.
The
phenomenon
turbid
current
intrusion
resulting
turbidity
anoxic
conditions
reappearing
after
storm
runoff,
deterioration
quality,
was
observed
deep
canyon-shaped
Heihe
Reservoir.
objective
this
work
elucidate
effects
on
Reservoir
find
a
strategy.
In
study,
an
intensive
sampling
campaign
measuring
temperature,
dissolved
oxygen,
turbidity,
nutrients,
metals
were
conducted
reservoir
over
period
two
years,
water-lifting
aerators
improved
achieve
single
aeration
full
layer
mixing
oxygenation
functions
using
different
volumes
gas.
operation
mixed
three
months
ahead
natural
time,
good
maintained
during
induced
period,
thereby
extending
period.
results
can
provide
effective
strategy
improve
source
ensure
safety
drinking
water.
