reflection in field
TRANSCRIPT
Engagement with CSE since 2011
RW-convention in
2012. CSE is one
among other
organizers
Received Training on
Tools & Approaches for
CWS Management from
CSE, 2018. held at India
Received Training on Urban
Wastewater and Rainwater
Management
DEWATS, 2012
Mainstreaming RWHS at
Industry for production -
2019
Reflection in field
Training facilitated by
CSE and organized
by WaterAid in 2011
Mainstreaming Rainwater Harvesting System in Industry for production purpose : Bangladesh
Zahid Hossain
Consultant-WASH, UNICEF
WATER DEMAND AT TEXTILE
250 to 300 litres water needs for 1 kg cloth washing and dyeing according to PaCT ( IFC), which is equivalent to daily water use for 2 people (Restiani, 2016)
RMG & Textile sector consuming 1500 billion litresof groundwater annually ( It was published on 2014 by a survey, was conducted by Netherland and Bangladesh Government)
Groundwater
depletion
Groundwater table depletion
rate is 1-2 meters every year
due to huge water
withdrawing against recharge
Sources: CIMMYT-Bangladesh on 2014 under USAID funded research project
Why Rainwater Harvesting at RMG & Textile sector?
0
500
1000
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3500
1953
1956
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1965
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1971
1974
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2013
2017
Rai
nfa
ll, m
m
Year
Yearly Rainfall, Dhaka
0
200
400
600
800
Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec
Rain
fall
, m
m
Monthly Rainfall, Dhaka
2005 2006 2007 2008 2009 2010
2011 2012 2013 2015 2016 2017
Average rainfall 2000
mm at Dhaka and
surrounding
Country’s rainfall
1500 to 4000 mm,
average 2000 mm
Rain pattern changing
and unpredicted
Source: Bangladesh Agriculture Research Council
WHY RAINWATER HARVESTING AT RMG & TEXTILE SECTOR?
Considering the roof top as catchment area of factories under RMG and Textile sector (6850 factories including 4560 textile, average catchment area 8000 sqm). Source: BGMEA and BKMEA
90 billion litres of rainwater could be harvested annually
90 billions litres equivalent to 336 core Taka or 40 million US $ annually (38.37 Tk per cubic meter water) (1$ = 84 BDT)
WHY RAINWATER HARVESTING AT RMG & TEXTILE SECTOR?
Hardness free or less than 5 mg/l- water is essential for wet processing purposes, so groundwater treatment is essential in this regard (10 BDT is needed for 1 cubic water water), but in case of rainwater –no need
Rainwater has been storage into tank under gravity flow whereas energy and technology need for groundwater extraction
Solving Waterlogging problem emerging due to climate change
Rainwater Harvesting at Factory, Case study-1
Next Accessories Ltd
Underground recharge pitStorage tank
Filter tank
A
B
CD
Rainwater Harvesting at Factory, Case study-2
Fakir Fashion Ltd
Water reservoir
Filter
13000 30000
14000
7000
Inlet ( Rain comes from roof)Outlet (Filter water goes for uses)
5500
19000
Plan for Filter & Storage
A A
B
B
Design & Drawing by WaterAid Bangladesh Number of drawing 1
Scale: mm
Filter and Storage Design
Campus A
Campus B
Campus C
Inlet OutletStone chip
Rainwater Harvesting at Factory, Case study-2
Pic : Catchment, Pipe networking and Storage
Collector pipe
Roof
Fakir Fashion Ltd Filter tank
(underground)
Pipes come
down from
roof
Rainwater Harvesting at Factory-Case study-4
Epic Garments Manufacturing Company Ltd (EGMCL)
Pic 4: Catchment, Pipe networking and Storage
Catchment and Harvested rainwater-4 factories
NAL- Next Accessories Ltd
FFL- Fakir Fashion Ltd
MKDML- Metro Knitting and Dyeing Mills Ltd
EPIC-Epic Garments Manufacturing Company Ltd
6500
2294018390
30365
45009372 7700
20000
0
10000
20000
30000
40000
NAL FFL MKML EGMCLCat
chm
ent
Are
a, m
2
Fig 4: Catchment Area for RHS
To be used in future for RWHS Using for RWHS
Return on investment for RWHS is high
Reducing dependency on groundwater, eventually contributing to environmental sustainability
Controlling water logging in factory causing by heavy rainfall due to climate change
Helping for getting score for LEED certificate as well as helping to meet other compliance
CONCLUDING
REMARK