4/5 MD. IFTEKARUL A. 5 years ago on Google
Abstract: Background
and
Objective: Watershed
is
an
area
of
land
that
comprises
a
set
of
watercourses
and
rivers
that
all
drain
into
a
single
larger
water
body
(River).
Watersheds
are
important
since
the
surface
water
and
storm
water
runoff
within
a
watershed
eventually
drain
to
other
bodies
of
water.
During
increasing
and
executing
water
quality
protection
and
restoration
actions,
it
is
needed
to
consider
these
downstream
impacts.
The
present
study
was
conducted
to
explore
the
available
major
water
sources
of
the
Halda
river. Materials
and
Methods: Data
were
collected
through
extensive
field
survey
and
structured
questionnaire
survey
from
November,
2011-September,
2012.
Data
were
analyzed
by
one-way
analysis
of
variance
(ANOVA)
using
SPSS. Results: A
total
of
34
watersheds
of
the
Halda
river
were
recorded.
Out
of
them
major
seven
watershed
areas
namely:
Manikchari
Khal,
Dhurang
Khal,
Sattar
Khal,
Fatikchari
Khal,
Harualchari
Khal,
Baromasi
Khal,
Mondakini
Khal
were
selected
for
the
study.
The
mean
width
of
the
above
mentioned
Khals
were
33.75,
37,
51.5,
19.5,
15,
12.5
and
19
m,
respectively.
The
mean
depth
of
these
khals
were
5.75,
8.5,
10.5,
5.5,
7,
4
and
6
m,
respectively
and
the
approximate
length
of
these
khals
were
about
25,
56,
45,
28,
19,
17
and
18
km,
respectively.
Noteworthy
difference
was
found
among
the
watersheds
in
terms
of
mean
depth,
mean
width
and
mean
length
(p<0.05). Conclusion: Discharged
water
of
the
watershed
directly
covers
a
large
area
through
different
khals
of
the
river,
indispensable
resource
for
aquatic
organisms
and
human
being.
Therefore,
it
is
essential
to
conserve
these
watershed
areas
from
haphazard
pollution
for
sustainable
ecosystem
health
management
and
meaningful
development
of
the
country.
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