Dam of Béni Amrane
___—___…
The dam’s site is located in a meander at the
The concentration of sediments carried by Isser
downstream extremity of Lakhdaria’s gorges. The
wadi was high. In order to avoid a quick silting up
wadi’s course winds through a large plain falling
of the dam, the construction of an efficient ush
into the sea.
system was necessary.
To do so, Béni Amrane dam
The site was chosen because it allowed obtaining
was f1tted With 6 Hush galleries,
each tted With a
_
_
_
_
segment valve. In sp1te of this system, the dam’s
wate1 at a lesser cost, With a dam capa01ty sufc1ent
.
.
.
.
.
.
.
_
_
initial capaœty, 11.6 million cubic meters, was
to serve as a settlement and control basm during
_
d
d to 5 million cubic m t 1_
.
2003
T
the rain periods for transfer purposes.
uce
.
e e
S
…
_
'
O
increase the storage capa01ty of the dam, / fuses
Isser wadi and its tributaries have a basin with a
were installed. These have allowed the storage of
surface
of
4.
14.5
square
kilometers
with
a
7.1
million cubic meters without elevating the
vegetation
essentially
made
up
of
thick
water level’s maximum standards calculated for a
undergrowth protecting a slightly silted vegetal
ood water of 10000 cubic meters per second. This
land.
The water course bed contains recent
solution therefore proved to be more economic
deposits of sand and gravel; it is generally
than the dragging of the silt contained in the dam.
p
rotectedby gross
p ebbles and ensures annual
ln other respects, Isser wadi’s waters dissolved
contributions estimated at
million CUbIC
substances content is relatively high with therefore
meters.
a quality lower than the required standards for the
The construction of this transfer dam was carried
svpply Of drinking water. The mixture With
out around a 4«0—meter high and 4«60—meter long
Keddara wadi waters at the level of Keddaea wadi
rock dyke with a clayey core. It is founded on
normalizes the situation before the treatment
alluvia deposits in the water course bed. Under the
carried OUÎ at BOUdOU30U treatment station.
dy ke’s bed, a molded wall was built and anchored
The
Isser—Keddara—Béni
Amrane
system has
towards
the
bottom. in
the rock foundation.
allowed a considerable improvement of the supply
'
Through injections, a watërtight screen servmg
as
of
drinking water to the Algiers area … the
a C… Off wall was shaped under the molded WâH'
framework of an economic optimization of the
The ood water discharge, the Hush pieces of work
System
WhilSt regulating a considerable water
and
the
energy
clearing
are
its
main
resources capacity that
used to fall into the
sea. In
complementary components
other respects, Béni Amrane dam Situation has
enabled the development of important vegetat10n
Ï
The dam’s‘ waters transfer towards Keddara dam is
attracting a fauna that did not exist before in the
.dine through a pumping station tted with eight
grandiose framework of Lakhdaria canyon.
pumps
through a duct 31.3 kilometers long
ensuring a transfer of 114« million cubic meters per
;
year.
‘?
.—101
‘
___—___…
The dam’s site is located in a meander at the
The concentration of sediments carried by Isser
downstream extremity of Lakhdaria’s gorges. The
wadi was high. In order to avoid a quick silting up
wadi’s course winds through a large plain falling
of the dam, the construction of an efficient ush
into the sea.
system was necessary.
To do so, Béni Amrane dam
The site was chosen because it allowed obtaining
was f1tted With 6 Hush galleries,
each tted With a
_
_
_
_
segment valve. In sp1te of this system, the dam’s
wate1 at a lesser cost, With a dam capa01ty sufc1ent
.
.
.
.
.
.
.
_
_
initial capaœty, 11.6 million cubic meters, was
to serve as a settlement and control basm during
_
d
d to 5 million cubic m t 1_
.
2003
T
the rain periods for transfer purposes.
uce
.
e e
S
…
_
'
O
increase the storage capa01ty of the dam, / fuses
Isser wadi and its tributaries have a basin with a
were installed. These have allowed the storage of
surface
of
4.
14.5
square
kilometers
with
a
7.1
million cubic meters without elevating the
vegetation
essentially
made
up
of
thick
water level’s maximum standards calculated for a
undergrowth protecting a slightly silted vegetal
ood water of 10000 cubic meters per second. This
land.
The water course bed contains recent
solution therefore proved to be more economic
deposits of sand and gravel; it is generally
than the dragging of the silt contained in the dam.
p
rotectedby gross
p ebbles and ensures annual
ln other respects, Isser wadi’s waters dissolved
contributions estimated at
million CUbIC
substances content is relatively high with therefore
meters.
a quality lower than the required standards for the
The construction of this transfer dam was carried
svpply Of drinking water. The mixture With
out around a 4«0—meter high and 4«60—meter long
Keddara wadi waters at the level of Keddaea wadi
rock dyke with a clayey core. It is founded on
normalizes the situation before the treatment
alluvia deposits in the water course bed. Under the
carried OUÎ at BOUdOU30U treatment station.
dy ke’s bed, a molded wall was built and anchored
The
Isser—Keddara—Béni
Amrane
system has
towards
the
bottom. in
the rock foundation.
allowed a considerable improvement of the supply
'
Through injections, a watërtight screen servmg
as
of
drinking water to the Algiers area … the
a C… Off wall was shaped under the molded WâH'
framework of an economic optimization of the
The ood water discharge, the Hush pieces of work
System
WhilSt regulating a considerable water
and
the
energy
clearing
are
its
main
resources capacity that
used to fall into the
sea. In
complementary components
other respects, Béni Amrane dam Situation has
enabled the development of important vegetat10n
Ï
The dam’s‘ waters transfer towards Keddara dam is
attracting a fauna that did not exist before in the
.dine through a pumping station tted with eight
grandiose framework of Lakhdaria canyon.
pumps
through a duct 31.3 kilometers long
ensuring a transfer of 114« million cubic meters per
;
year.
‘?
.—101
‘