This document discusses stormwater harvesting, which involves collecting stormwater from urban areas and treating it so it can be reused. The key points are: - Stormwater is collected from drains or creeks and treated to make it safe for non-drinking uses like watering parks. This reduces drinking water demand and pollution entering waterways. - A stormwater harvesting scheme includes an extraction point, transport pipes, a storage tank, treatment system, distribution pipes, and management of byproducts. Several case studies and types of schemes are presented. - Benefits include alternative water source, sustainable water management, and reducing flooding and pollution. Solutions discussed include modular tanks, filtration, pond development, ecological channels

1. Storm Water Harvesting

2. Flow
• The Philosophy – Why?
• Vision
• Methodology
• Solutions

3. What is Stormwater Harvesting
• Stormwater harvesting involves collecting, storing and
treating stormwater from urban areas, which can then be
used as recycled water.
• The stormwater is collected from stormwater drains or
creeks, rather than roofs. Recycled water is treated so it’s
safe to use. Recycled water produced from stormwater
harvesting is commonly used to water public parks,
gardens, sports fields and golf courses.

4. “Character of a nation is determined by its Quality of Water”.
- Humberto Urriola

5. PROBLEM
Fundamental Design Problem
Upstream Vs Downstream

6. Benefits of stormwater harvesting
• Reduces the demand for drinking water by replacing it with
recycled water produced from stormwater harvesting.
• Reduces stress on urban streams and rivers by capturing
some of the pollutants and nutrients that would otherwise
enter waterways from stormwater flows.
• Enables users to access an alternative source of water for
non-drinking use.
• Increases opportunities for sustainable water management,
which is an important consideration in water sensitive urban
design.

7. Stormwater Harvesting Schemes
Stormwater harvesting schemes can be large or small.
A stormwater harvesting scheme consists of:
• an extraction point where stormwater is captured or diverted
from a drain, creek or pond
• a network of pipes to transport stormwater from the connection
point to the storage site
• a dam or storage tank where stormwater is temporarily
collected for treatment and use
• a treatment system that produces recycled water that is suitable
and safe for its permitted use
• a network of pipes for distributing recycled water
• a system to manage by-products produced in the stormwater
harvesting facility.

9. Steps to follow

10. Preliminary investigations and advice
Doing some research for your stormwater harvesting scheme is the
first step.
Details we need to consider for your proposal include: •
•
•
•
•
how the recycled water will be used
the volume of recycled water required for the proposed end use
required extraction volumes
the proposed stormwater treatment system
the space required for your stormwater harvesting treatment
facility
• likely costs and savings

11. Develop and review your concept
plan and design
Develop a concept plan and design that details
the proposed:
• location of the extraction point
• stormwater extraction volume
• collection and treatment processes
• any discharge points.

12. Decide whether to proceed
If we decide to go ahead with stormwater
harvesting scheme, we will need to select a
technology supplier and may need to engage a
Water Servicing Coordinator (WSC).

14. Innovative Water Management Solutions
• Gravity based solutions
• No external energy or chemicals involved
• Based on molecular design of water
• Capillary action
• Aeration of water
• Emulating natural systems
• External filter saving natural resources
• Similar products for various applications
• Minimize maintenance time and cost
•Qualify for Green Ratings / LEED points

15. Fundamental Design Problem
100% PERVIOUS SURFACE
100% IMPERVIOUS SURFACE
Vs
The Traditional Solution
Stormwater Pollution
Destroys Natural Ecosystems
Pollutes Water Bodies Increases Global Warming
Creates Urban Flooding Increases Drought Burden
The Sustainable Solution
Point source Solution
No Environmental Hazards
Clean Water Storage
No Urban Flooding
Reduces Global Warming Cost Effective

16. Innovative & Sustainable Solutions
planning | design | implementation | Payoff
Water Management
Modular Rainwater
Modular Storm Water Harvesting
Pond / Development
Pond / Lake Remediation
Modular Waste Water Treatment
Landscaping
Vertical Gardens
Roof Gardens
Aqua Scaping
Soft Landscaping
Hard Landscaping
Vertical Drainage
Consultancy
Watershed Management
Water Audits
Urban Flood Mitigation
Ecological Channels
Vertical Drainage

17. Steps Involved
• Planning
 Feasibility study
 System specifications
 Engineering drawings
 Site audit
– Sources for water harvesting
– Irrigation system evaluation (if needed)
– Uses for harvested water
 LEED evaluation
 Budget estimate
 Return on investment analysis
– Water savings
– Energy savings

18. Steps Involved (Contd.)
• Installation/Site Management
 Project planning with target dates
 Site coordination
 On-site installation supervision and project management
 Testing and commissioning
 User system/product training
 Coordination of integration with building automation
system
• Service
Full system warranty

19. Modular Rainwater & Stormwater Harvesting
Benefits
•Eco friendly, qualifies for getting carbon
credits
•Qualifies for LEED points / Green Ratings
•Surface above the tank can be used for any
type of landscaping
•Easy to expand and relocate according to
new site plans
•Low maintenance costs
•Long shelf life of 50 years
•Quick installation
•Clog free, safe & highly load bearing

21. MATERIALS USED
in a Modular Tank
Geo-textile
Waterproof Liner
(for Storage and reuse only)

22. Dual Step EXTERNAL FILTRATION
for easy and inexpensive maintenance, Clog-free performance
Step – 1
De-silting Chamber/Oil Filter
Step – 2
Patented Micro-Filter
• Designed for any flow situations
• Pre-manufactured, short time of installation
• Designed for easy and low cost maintenance
Easy Maintenance
• Removes particles up to 180microns in size
• Suitable for flow situations of 72 cum/hr
• Pre-manufactured, short time of installation
• Extremely easy to maintain – at little or no cost

23. Flexible Applications of Modular Technology
i. Ground water recharge using recharge wells
ii. Storage + Reuse
iii. Storage + Percolation
iv. Pond Recharge

24. Successful
Installations
158 CUM
102 CUM
200 CUM
20 CUM
73 CUM

25. Final Sites can be under
• Driveways
• Parking
• Parks
• Sport fields
• Ponds

26. Successful Installations
Capacity:
6,00,000 Liters
Application:
Breweries - Below parking lot
Catchment:
Surface & Storm water

27. Capacity:
1,200,000 Litres
Application:
Automobile Manufacturing Facility - Below lawn
Catchment:
Surface & Rooftop

28. Innovative Approach

29. Solution
Pond Development
Advantages
• Contributes to zero discharge
• Can be used as recharge, store and reuse
• Quick to install
Laying of geo textile
Compaction
• Restores water bodies
• Adds to the aesthetics
Installation of EPDM liner

30. Case Study
Pond Development
Pond
–
Budi Bawal

31. Solution
• Increases road lifetime
• Water reuse / harvesting
• Increases land use
• Reduces urban flood
• Saves lives eliminating dangerous open
water channels
• Restores microhabitats
• High load bearing capacity
• Can create bio-swales / rain gardens
• Reduces erosion by in-filtering water at
the source
Ecological Channels

32. Steps Involved

33. Case Study
70m long drain with
recharge rate of
1200 litre / hr

34. Solution
Bio swales / Rain garden
• Best for large parking lots and
their connecting road drain network
• Controls flood
• The added green space provides
habitat for some wildlife species,
especially birds
• Reduces sediment load and other
water pollutants from reaching
natural watercourses

35. Solutions
Bioremediation
Advantages
• It is a natural process
• Cost effective
After
• Lesser energy required
• Less supervision
• Treats area that are not easily accessible
or inaccessible to other technologies
• Air pollution concerns from volatile
chemical evaporation are eliminated

36. After
On-site Purification
Before
Nala Rehabilitation

37. Water Logging, 100% Runoff
PROBLEM
Cause
Poor Urban Planning
Consequences
100% Runoff through Concrete
Water Stagnation leads to
Mosquito Breeding
Water Logging

38. Solution
Sub Surface Drainage
Benefits
•Captures rain water for reuse
•Prevents flooding
•Increases property value
•Increases usable space
•Driving vehicles onto the grass has no effect on
the protected roots
•Access roads, footpath, parking bays, driveways

39. Case Study
Sub Surface Drainage
The developers wanted to provide overflow visitors parking that was
aesthetically pleasing for residents. The 52 mm turf cell was installed with a
subsurface layer of 30 mm drainage cell and turfed for immediate use.

40. Thank You
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