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Dosing Unit
Reg
ula
tin
g B
asin
(co
nst
ruct
ion
w
ater
dam
)
HES
Mix
ing
Zon
e
HES
Set
tlem
ent
Zon
e
Un-regulated Inflows
Reg
ula
tin
g D
evic
e (P
ipe)
Leve
l Sp
read
er
High Flow Bypass
Dosing Unit
Type E HES basin (regulate and treat flows up to Q3mth during earthworks and
build out of upstream catchment)
Target Particle Size: Coarse >125micron Fine/Colloidal <125micron
Desilting Frequency: Regular (monthly) Infrequent (annually)
RL ‘X’
Weir Crest: RL ‘X’
US IL: RL ‘X’-1m; DS IL: RL ‘X’-1.2m
LS Crest RL: ‘X’-1.4mWeir Crest RL: ‘X’-1.6m
Reg
ula
tin
g B
asin
HES
Mix
ing
Zon
e
HES
TSe
ttle
me
nt
Zon
e
Inflows
Reg
ula
tin
g D
evic
e (P
ipe
)
Leve
l Sp
read
er
BASE: RL ’X’- 3.1mBASE: RL ’X’- 2m
High Flow Bypass
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▪
▪
▪
▪
Reg
ula
tin
g B
asin
(c
on
stru
ctio
n w
ater
dam
)
HES
Mix
ing
Zon
e
HES
Set
tlem
ent
Zon
e
Inflows
Reg
ula
tin
g D
evic
e (P
ipe
)
Leve
l Sp
read
er
High Flow Bypass
Dosing Unit
Type E HES basin (regulate and treat flows up to Q3mth during
earthworks and build out of upstream catchment)
Retarding Basin(regulate peak flows up to Q100 during catchment bulk
earthworks)
Q100 Inundation
Q10 Inundation Retarding Basin Outlet Control
Reg
ula
tin
g B
asin
(c
on
stru
ctio
n w
ater
dam
)
HES
Mix
ing
Zon
e
HES
Set
tlem
ent
Zon
e
WSUD Tertiary TreatmentInflows
Reg
ula
tin
g D
evic
e (P
ipe
)
Leve
l Sp
read
er
High Flow Bypass
Dosing Unit
Type E HES basin (regulate and treat flows up to Q3mth during
earthworks and build out of upstream catchment)
Phase 1 WSUD Treatment within Retarding Basin(treat flows up to Q3mth and regulate peak flows up to
Q100 during catchment build-out)
Q100 Inundation
Q10 Inundation Retarding Basin Outlet Control
WSU
D S
edim
ent
Pon
d
WSUD Tertiary TreatmentInflows
High Flow Bypass
Q100 Inundation
Q10 Inundation Retarding Basin Outlet Control
Ultimate WSUD Treatment within Retarding Basin(treat flows up to Q3mth and regulate peak flows up to Q100)
