Pages in this set

Page 1

Preview of page 1
Rivers

River
-
Rivers
begin
in
upland
areas
and
make
their
way
down
to
the
sea.
A
river
starts
and

the
source
and
meets
the
sea
at
its
mouth.
As
the
river
travels
to
the
sea
it
channel
and

valleys
change.


River
Drainage
Basin


Drainage
Basin
-
the
area
of…

Page 2

Preview of page 2
Attrition
-
Pebbles
bashing
into
one
another
becoming
more
rounded
and
smaller
as
they

move
down
the
river.


Changes
in
Characteristics


Upper
Course
Features


Discharge
-
This
is
the
amount
of
water
passing
a
specific
point
at
a
given
time.
It
si

measured
in
cubic
metres
per
second.
The
discharge…

Page 3

Preview of page 3



























Meanders










Deposition









Erosion







Cross
Section


















Deposition





Erosion

Page 4

Preview of page 4
Formation
of
Ox-bow
Lakes


Ox-bow
Lake
-
Horse
shoe
shaped
lake
that
is
a
cut
off
meander.


1.
The
erosion
on
the
outside
of
the
meander
causes
the
arms
of
the
lake
to
get
closer

together
and
the
neck
to
get
smaller.


2.
Eventually
the
river
breaks
through
and
the…

Page 5

Preview of page 5
Deltas


Delta
-
A
low
flat
area
of
land
that
is
formed
at
the
mouth
of
a
river
and
formed
by

deposition.



Deltas
are
usually
made
up
of
fine
sediment,
which
is
deposited
when
the
river
loses
energy

as
it
flows
through
the
mouth
and
becomes
part
of
the
sea.…

Page 6

Preview of page 6
Floodplains
-
Flat
area
of
land
either
side
of
a
river
channel
in
the
Lower
course.
Usually

used
a
lot
for
agricultural
use
or
building
because
it
is
so
flat.


If
a
river
floods,
water
will
spill
out
over
the
surrounding
land,
the
floodplain.
Friction
will
be

increased
and
velocity…

Page 7

Preview of page 7
Flooding


Causes
of
Flooding


Human
causes
Physical
causes

Ploughing
up
and
down
slopes
instead
of
Impermeable
rock
means
that
rainwater

around
them
channels
the
rainwater
to
the
cannot
soak
into
the
rocks
and
therefore

river
faster.
flows
more
quickly
to
the
river.



Dams
may
burst
which
will
cause
excess
If…

Page 8

Preview of page 8
DEFRA
(
The
Department
of
Environmental,
Food
and
Rural
Affairs
-
Holds
responsibility
for

deciding
which
areas
are
at
risk
of
flooding
and
where
to
spend
on
money
ondefences.


Planning
and
Building


Before
2012
to
build
on
floodplains
you
had
to
get
planning
permission
and
get
a
Flood
Risk

Assessment…

Page 9

Preview of page 9
sports
-
Extremely
expensive

Dams
Dams
are
often
built
along
-
Water
is
stored
in
a
-
Expensive

the
course
of
a
river
in
reservoir
which
can
be
-
Sediment
is
often

order
to
control
the
amount
used
to
generate
trapped
leading
to

of
discharge.
Water
is
held
hydroelectricity.
erosion…

Page 10

Preview of page 10
Global
Effects
of
Flooding


Nepal
2008


Flooding
began
when
a
dam
burst
on
the
Saptakoshi
River
in
Nepal.
Nearly
1,000
homes

were
destroyed,
power
supplies
and
trasport
were
severely
affected.
Illnesses
such
as

diarrhoea
and
pneumonia
hit
and
5000
people
were
left
homeless
with
4000
forced
to
live

in
government…

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all resources »