Drainage master plan fordelhi

8/11/2019 Drainage master plan fordelhi

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Drainage Master plan for

Delhi

UTTIPECSupported by OASIS Design

Vision

Presented to Indian Flood Control Department


2/20

Issues No segregation between sewerage and storm water infrastructure.

Monsoon rains lead to water logging and inundation in the city. Water not

harvested and allowed to go waste, even when city faces water paucity.

Increase % ofpaved surfaces, reducing water percolation and increasing run

off.

Colonies situated in low lying areas experience acute drainage congestionand backwater flow.

Drains flow from adjoining states (UP and Haryana) increasing pressure on

Delhis drainage system.

Unauthorised colonies adding to pressure on infrastructure. Sewerage, solid

waste, stormwater all dumped together in a single drain. Pollution of River Yamuna, which is also a major source of water supply for

the city, by drains that carry sewage, solid waste, industrial waste etc.

Contaminated ground water.


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Water Strategies

Implement Zero Run-off on Roads & Parks

Manage Storm water & Sewage/ Waste Water

Locally & Naturally.

Create City level Watershed Management Plan and

Urban Drainage Masterplan

Protect & Restore Natural Water Systems through

bio-remediation.

WATER

Masterplan Policies for Natural Water Systems:


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PERMEABLE SURFACES C o n v e r t i n g IMPERMEABLE

SURFACES RoadsParking lots

Building

Pavements30 %

EVAPORATION

75%- 100%

IMPERMEABLESURFACE

55 %

RUNOFF

15% DEEP

INFILTRATION

40 %

EVAPORATION

10 %

RUNOFF

50% DEEP

INFILTRATION

75%- 100% PERMEABLESURFACE

Idea : Federal In teragency Stream Restoration Work ing Group (FI SRWG) US.

Impact of Urbanization


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Only Roads & Open Greens provide opportunity for Storm Water

catchment & Infiltration.


6/20

Storm water falling

on road surface

Quickly collected inroadside drains

To the Naalas

To the river

Current Scenario


7/20

Drainage system in the city

As per MPD-2021:

ZERO RUN OFF

DRAINAGE SHOULD

BE ADOPTED

At Present drainage

system, we are doing

100% RUN OFF


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All the stormwater falls on road and it is divertedtowards the closest Naala or drain.


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PRESENT Storm water management facility in the city

Storm water

from road goes

to near by

drain and then

to r iver.

Evaporation

To Nearby

Drain


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Most of the time, the existing system is clogged up


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1: Treat at Source

(streets, parks)

2: Natural Conveyance

(minimal piping)

3: Natural Storm

Water Treatment

Utilize Parks and Open Spaces for Natural Storm

Water Management.

Adopt a 3-Tier Approach:

To avoid Delhi Flash Floods

Reduced FLASH FLOODS

Recharge of Ground Water

Less pressure and reduced sizing for Municipal Storm Water

Treatment Plants.

PREVENT POLLUTING THE YAMUNA!11

Replenish Ground Water by minimizing Runoff & increasing local infiltration/

Recharge of Ground Water.

Minimize Runoff;

Catch Storm Water locally.


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CONVENTIONAL ROAD SECTION:

PROPOSED ROAD SECTI ON:


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INSERT SWALE or

PLANTER HERE

STREETS-

EXISITNG


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GREEN STREETS-RETROFIT OPTION-Showing storm water

collection on streets


15/20

RAIN GARDEN

Roadside Greens should become Storm Water Filters & Conveyers.


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Parks & Open Spaces should be zero run-off.

Parking structures should not be allowed under Parks.

Integrate Parking within buildings, or

Restrict through Pricing.

Parking under parks

makes them


17/20

Create City level Watershed Management Plan and Urban

Drainage Masterplan

Typical Watershed Map of a City, with multiple watersheds

Watershed map using DigitalElevation Model (DSSDI)


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Integrated WatershedManagement Plan (WMP)is to

be prepared for Delhi so that

Natural drainage systems can be

restored.

At present IIT Delhi has been hired

by IFCD for the preparation of

drainage Master Plan. However

the Drainage Master Plan cannot

be an engineering project.

Environment department is to be

included in the preparation of the

plan.

Create City level Watershed Management Plan and Urban

Drainage Masterplan


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Protect & Restore Natural Water Systems through bio-

remediation.

BEFOREAFTER morphogenesis


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Watershed mapping and catchment areas identification in GISusing DEM.

Integrated Storm water management strategy of each

catchment, planning for working landscapes and street

retrofitting to enable decentralization.

segregated sewage infrastructure, solid waste management

and monitoring to ensure pollution free storm water drains.

Mandatory rainwater harvesting at micro level.

Way Forward

Documents

Drainage master plan fordelhi