Waste Water

Waste Water

Chaan Kwok Yin
Y (201233218H)
Top
pic: Introdu
uce Rooftop
p System too the Storm
m water Sysstem
1. Objective
Reeduce the ruunoff by app
plying extennsive green rooftop.
2. Backgroun
nd
Currently, green
g
roofto
op has becom
me a conceern for storm
m water mannagement ass the
ng.
awaareness of green buildin
3. Introductioon
Rooftop system consissts of a thin layer of vegetation and
d growing m
medium
installed on topp of a conveentional flatt or sloped roof.
r
It prov
vides tempor
orary storagee of
storrm water runnoff on rooff surfaces. T
To a water resources
r
manager,
m
theey are attractive
for ttheir water quality, water balance,, and peak flow
f
controll benefits. A
Also, from a
hyddrologic persspective, the green roo f acts like a lawn or meeadow by sttoring
rainnwater in thee growing medium
m
andd ponding arreas.

Greeen roofs aree distinct fro
om traditionnal rooftop gardens beccause they ppromote pro
oven
susttainable conncepts. Typiically rooftoop gardens have
h
been purely
p
an aeesthetic featture
of a buildings ‘roofscape’.

. Green rooffs maximizee the potenttial of havinng vegetatio
on
on tthe roof by collecting
c
and
a harvestiing storm water
w
via a well-designe
w
ed drainage
systtem.

Typpes of greenn roof
Theere are 2 typpes, extensiv
ve and intennsive green roof.
Exteensive greenn roofs are suitable forr lightweigh
ht buildings;; the plants adopted aree
speccies of seduum, shrubs and
a bushes tthat need lo
ow maintenaance and caan be
selff-generative. Usually, th
he costs aree lower than
n semi-inten
nsive or inten
ensive green
n
rooffs.
Thee intensive green
g
roof or
o landscapee, suitable for
fo undergro
ound garagees and heavy
y
builldings, is a common
c
roof garden, w
with bushess, ornamentaal plants andd also trees,
and needs reguular garden maintenanc
m
e. Walkway
ys, benches, playgroundds or even
ponnds can be established as
a additionaal...

Similar Essays