3. 1.Opening of Indian economy 1991.—
GROWTH became the mantra…..
2. In Bengaluru establishment of
Electronic industries 1991—
becoming IT industries as now…
3.Year Population
1990 4,036,000
1995 4,745,000
2000 5,567,000
2010 7,469,000
2015 10,839,725
2016 11,556,907
Source :Ramachandra, T.V.; Bharath H. Aithal and Durgappa D. S. 2012. Insights to urban dynamics through landscape spatial
pattern analysis, Int. J Applied Earth Observation and Geoinformation, 18; 329-343, http://dx.doi.org/10.1016/j.jag.2012.03.005
13. Cut to the present…
• How is inequity to be eliminated or reduced ?
• How do we build resilience ?
• Distribute and de-risk dependencies..
• Decentralize
• Involve more solution providers
• Think multiple solutions…
14. Key challenges
• Social
• Technical
• Institutional
• Financial
• Legal
• Environmental
• The knowledge services to be provided to the city – individuals,
communities and institutions .
20. Hydro-flows
• Surface runoff 15 90
• Recharge 10 5
• Evapo-transpiration 75 5
• The aim of rainwater harvesting is bio-mimicry.
21.
22. The new rainwater harvesting bye-law
• For every plot create recharge or storage
• @ 20 litres per square metre of roof area
• @ 10 litres per square metre of paved area
Minimum depth of recharge well 3 metres
23. How to harvest rainwater ?
• Understand rain (quantum/pattern/intensity)
• Cascade capture
• House/Apartment/Institution/Industry/Park
• Storm water harvesting in ‘tanks’/lakes
• Ground water recharge
41. The ‘other’ benefits of rainwater harvesting
• Investment of Rs 750 crores approx. created
• Jobs for plumbers and well diggers
• Innovation in terms of nearly 40 rainwater filters developed
• Skill up-gradation of over 1000 plumbers
• Rainwater harvesting theme park created for water literacy
44. • Locate recharge well in the channel or off the channel
• Make arrangements to remove silt and leaves before water
enters recharge well
• Monitor the rate of recharge and decide on the number of
recharge wells necessary for the catchment
51. …WSUD is also about construction and how
we build and what do we use or disuse
52. Is there a new possibility?
Can cities be not predatory?
Can cities be part of solution?
Solution is to look at the resources
to build them…
Solution is to look at how they will
live..
Solution is to empower people
coming to the city
96. WAY FORWARD….
• Replication has begun in a few
lakes including one with
Corporate Social Responsibility
and will need to reach all the
remaining lakes of the city.
• Will assist in the formulation of a
waste water policy in the
city/state.
98. Dakshina Pinakini river
• Flows capture the sewage from North and East of the city
• 700 to 900 million litres per day of untreated wastewater
• Being used extensively by farmers for cultivation including filling two
reservoirs in Tamil Nadu – Kelavarapalle and Kaveripattinam
99.
100.
101.
102.
103.
104.
105.
106.
107.
108.
109.
110.
111.
112.
113.
114.
115.
116.
117. Total irrigated area in Dakshina Pinakini
• Estimated to be around 5000 Hectares
118. Key Observations
• A vast hinterland of wastewater agriculture provides livelihoods and
employment in the city
• No formal institutional mechanism exists to monitor and manage this
• Farmers have made huge investments in pumping the wastewater
into their fields
• A risk management approach using the Sanitation Safety Plan
developed by WHO can be adopted in the short term
139. ROOF
• 100 sq. mt. 100,000 litres of water
• 100 sq. mt 200 kgs of rice and vegetables
• 100 sq. mt. All the grey water –100 ltrs/day
• 100 sq.mt All the urine 1500 litres / year
• 100 sq. mt All the solid waste generated
• 100 sq mt 32 different species of birds
• 100 SQ mt Heat 100 litres daily
• Light 12 bulbs
• Cook for 4 people lunch and dinner
