jal vihar apartments h2o transformer report for · bangalore, off bannerghatta road total number of...

H2O Transformer Report for Jal Vihar ApartmentsWater Conservation Scorecard & Integrated Water Solutions

September 2019www.urbanwaterdoctor.com

EXPERIENCE & RESEARCH THAT UNDERPINS H2O TRANSFORMER

Dr Bhakti Devi20+ years in Sustainable Facilities & Urban WaterEx Sydney WaterEx City of SydneyFounder, Urban Water Doctor

Program Lead & Creator2

www.urbanwaterdoctor.com

● 30 years in urban water sector● 20+ years of designing innovative & high

impact water conservation programs for Australian cities & communities

● 15 months of on-ground research interviewing & surveying Apartments, Residents, Association members, Vendors & Solution Providers in Bengaluru

● Testing the “servicing” aspect on local Apartment buildings & “training” aspect on nearly 300 participants.

https://www.linkedin.com/in/bhaktidevi/

OUTLINE● Our Mission, Our Approach, Our

Services● Overview of Jal Vihar● Water Consumption by Source● Site Catchment Water Balance● H2O Transformer Scorecard● H2O Transformer Integrated

Solutions

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Our MissionOur ApproachOur Services

4www.urbanwaterdoctor.com

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Our Mission - Service & Skill

● To provide an affordable service to Apartment Building Associations of transforming them from being water-stressed to becoming generators of usable water never running dry.

● To skill up youth and women in to work as Water Accountants, Water Auditors & Water Security Planners through hands-on Training


Our Approach

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● Achieve 50 to 100% reduction in dependency on external and unsustainable water sources

● Change behaviour towards evidence-based decision-making on water conservation○ Water Conservation Scores ○ Indoor Water Audit & Water Practice

Survey○ Costing and Case Studies for all

suggested solutions● Vendor-neutral water solutions customized

to the Apartment Buildings


Our Services - 4 Levels

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1. BASIC - H2O Transformer Scorecard - Current Water Conservation Status

2. INTERMEDIATE - Water Conservation Integrated Solutions Plan (incl. Detailed Costing)

3. ADVANCED - Solution Implementation Support

4. RECURRING - Year long ongoing awareness & monitoring and Annual update of H2O Transformer Scorecard


Jal Vihar Apartments - Overview


Jal Vihar Apartments - Overview: Part 1 of 4

● 4 Storied Apartment Building in South Bangalore, off Bannerghatta Road

● Total Number of Flats - 12 ; Vacant Flats - 2; Roof Area = 500 sqm Open = 200 sqm

● Main Sources of Water - Kaveri & Borewell ( 2 Borewells)

● Borewell yield is reducing gradually with one of them gone dry already

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Jal Vihar Apartments - Overview Part 2 of 4

● Receives Kaveri Water from BWSSB Supply System. Frequency of supply is three days a week

● Kaveri water is received in an underground tank which also receives Borewell water (15000 Litres capacity).

● Average Annual Kaveri water bill is Rs 63000

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Jal Vihar Apartments - Overview Part 3 of 4● 2 Borewells in the premise - One is 800 ft

deep and other is 280 ft deep. ● Yield from the BWs has gradually been

reducing since Dec 2018. ● The deeper borewell has dried with no yield● The 280ft deep BW currently is pumped for

20 mins each day using 2HP pump. ● Previous to Dec 2018, the BWs were pumped

twice for 20 mins using 2 HP pump and the water was collected in the same underground sump (15000 Litres capacity) in which Kaveri water is received.

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Jal Vihar Apartments - Overview Part 4 of 4● Water from underground tank is pumped to

OHT tank (3x 2,000 Litres capacity) supplying to the flats for kitchen bathroom and toilet flushing.

● Rainwater is harvested, passes through approx 1000 litre capacity filter & collected in the same underground raw water tank which collects Kaveri and BW water.

● Overflow is diverted towards deeper BW and any excess goes to stormwater drain

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WATER CONSUMPTION


Feb’18-Jan’19 Consumption - Breakdown by Source

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Borewell Yield has dropped significantly & Kaveri water is also getting restrictive. High Probability of Switching to Tanker Water

Feb’18-Jan’19 Consumption - Breakdown by Usage

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Water Consumption Summary

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Total Annual Consumption, Litres 3,242,142

Average Monthly Consumption, Litres 270,179

Average Daily, Litres 9,006

Average per Flat (Occupied) 901

Average Litres/Person/Day 300

Feb’18-Jan’19 Consumption - Indoor vs Outdoor

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SITE CATCHMENT - WATER BALANCE


SITE CATCHMENT - WATER BALANCE

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Runoff to Discharge94%

Runoff to Recharge5%

Rainwater Harvested & Used 1%

H2O TRANSFORMER SCORECARD


H2O Efficiency

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H2O EFFICIENCY SCORE - Feb 2018- Jan 2019

● How efficiently do residents use the water that they already have?

● Lower the score, better is water use efficiency ● Current H2O Efficiency Score is 300 Litres per

person per day● Potential for reduction in water demand through

water efficiency is 30-40%● Water Savings is equivalent to Rs 40,000 - Rs

50,000 per annum monetary savings (savings of Rs 100k-130K if switched to Tanker Water)


H2O Efficiency >200 151-199 <150

H2O Neutrality

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H2O NEUTRALITY SCORE - Feb 2018 - Jan 2019● How sustainable is Groundwater use from Borewells?● Greater the score, more sustainable is groundwater

use.● Current H2O Neutrality Score is 0.3%● Potential for enhancing long-term water security is

90-100+% ● Improved H2O Neutrality Score impact means

sufficient groundwater available during long dry spells - reduced Tanker Water imports during summer & in future


H2O Neutrality <10% 9-59% >60%

H2O Self Sufficiency

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H2O SELF SUFFICIENCY Feb 2018-Jan 2019

● How dependent are the residents on external H2O sources and unsustainable GW extraction?

● Higher the score better is the H2O Self Sufficiency.; Lower score means greater dependency on external & unsustainable sources

● Current H2O Self Sufficiency Score is very low - 0.2%● Maximum Potential for improved self sufficiency is

20-30% due to space constraints. ● Improved H2O Self Sufficiency score impact is reduced

chance of purchasing tanker water & reduced water bill for Kavery Water.


H2O Self Sufficiency <20% 21-59% >60%

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H2O DISCHARGE SCORE - Feb 2018-Jan 2019● How much of locally generated water is put to reuse

or recycle?● Higher score is indicative of untapped potential for

using locally generated water. ● Current H2O Discharge Score is 99%● Potential for improved H2O Discharge score is 70%

after accounting for demand reduction strategies, RWH & GW recharge & Greywater reuse strategies

● The impact is equivalent to 45% reduction in import of Kavery water & reduced chance of importing Tanker water


H2O Discharge >60% 21-59% <20%

H2O Discharge

H2O SECURITY RISK


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Future Scenario:Borewell runs dry (HIGH RISK)

Insignificant : Risks that will cause a near negligible amount of damage to water security

Marginal: If a risk will result in some damage, but the extent of damage is not too significant and is not likely to make much of a difference to the overall water security

Moderate: Risks which do not impose a great threat, but yet a sizable damage can be classified as moderate.

Critical: Risks with significantly large consequences which can lead to a great amount of loss are classified as critical.

Catastrophic: These are the risks which can make the project completely unproductive and unfruitful, and must be a top priority during risk management.

Definite: Water scarcity risk that is almost certain to show-up(more than 80% likely) H H E E ELikely: Water Scarcity Risks that have 60-80% chances of occurrence M H H E EOccasional: Water scarcity Risks which have a near 50/50 probability of occurrence. L M H E ESeldom: Water Scarcity Risks that have a low probability of occurrence but still can not be ruled out completely. L L M H EUnlikely: Water Scarcity Risks that may be rare and exceptional risks with less than 10% chance of occurrence. L L M H H

LIKELIHOOD

CONSEQUENCE

300 LppdH2O Efficiency

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0.2%H2O Neutrality

0.3%H2O Self

Sufficiency

99%H2O Discharge

H2O TRANSFORMER SCORECARD - Feb’18-Jan’19


HIGHH2O Security

Risk

H2O TRANSFORMER SOLUTIONS


Overview of Strategies & Solutions for

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● Improving H2O Efficiency Score● Improving H2O Neutrality Score● Improving H2O Self Sufficiency

Score● Impact on H2O Discharge Score

H2O EFFICIENCY IMPROVEMENT SOLUTIONS & STRATEGIES


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H2O Efficiency Score post-implementation

H2O Security Risk post implementation

194 lppd High Risk

Tap Aerator Installation in Bath & Kitchen Basin

Taps

4 Months

Solution # 1 Payback Period Upfront Investment per HH

Rs 1500

Rs 46,428 per year

Water Bill Savings

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H2O Efficiency ScorePost implementation

H2O Security Risk post implementation

252 lppd High Risk

Smart Water Sub Metering of Flats

4 Years

Solution # 2 Payback Period Upfront Investment per HH

Rs 5000

Rs 21,024 per year

Water Bill Savings

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Submetering + Tap Aerator Installation

1.4 Years

H2O Efficiency Score post implementation H2O Security Risk post implementation

150 lppd Moderate Risk

Strategy # 1 Payback Period Upfront Investment per HH

Rs 6500

Rs 65,700 per year

Water Bill Savings

H2O NEUTRALITY IMPROVEMENT SOLUTIONS & STRATEGIES


Solution # 3

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Rainwater Harvesting (RWH) Retrofit - Dedicated 2000 Litres Tank + Convert Filter to Storage + Groundwater (GW) Recharge (Artificial Injection Well Method)

6 Years

Payback Period Upfront Investment per HH

Rs 15,000*

Updated H2O Efficiency

Score

Updated H2O Security Risk


Updated H2O Neutrality

Score

36%* This cost can vary significantly depending on which of the 2 Borewells will be recharged using Artificial Injection Well

Rs 67,452 per year

Water Bill Savings

Strategy # 2

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Sub Metering+ Tap Aerator+ RWH Retrofit+ GW Recharge using Artificial Injection Well

6 Years

Payback Period

Updated H2O Efficiency Score



Upfront Investment per HH

Rs 21,500

Updated H2O Neutrality Score

36%

Rs 67,452 per year

Water Bill Savings

H2O SELF SUFFICIENCY IMPROVEMENT SOLUTIONS & STRATEGIES


Solution # 4

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Greywater Reuse 7 Years

Payback Period

Updated H2O Efficiency Score


132 lppd Low Risk


Rs 5,000

Updated H2O Self Sufficiency Score

70%

Rs 73,584 per year

Water Bill Savings

Strategy # 3

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Sub Metering+ Tap Aerator+ RWH Retrofit+ GW Recharge (Artificial Injection Well) + Greywater Reuse

5 Years

Payback Period

Updated H2O Efficiency

ScoreUpdated H2O Security Risk

132 lppd Low Risk


Rs 26,500

Updated H2O Neutrality

Score

36%

Updated H2O Self

Sufficiency Score

28%

Updated H2O Discharge

Score

70%

Rs 73,584 per year

Water Bill Savings

132 LppdH2O Efficiency

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28%H2O Self

Sufficiency

36%H2O

Neutrality

70%H2O Discharge

H2O TRANSFORMER SCORECARD UPDATED


LOWH2O Security Risk

To Avail Next Level of H2O Transformer Service: Contact

Dr Bhakti [email protected] +91 7042 328 076www.urbanwaterdoctor.com

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mailto:[email protected]

http://www.urbanwaterdoctor.com

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