11PLANNING STRATEGIES FOR STORMWATER MANAGEMENT FOR URBAN AREAS:
LESSONS FOR INDIA
Prerna Jasuja1 and Esha Bhatnagar2
1, 2

Research Scholars, Department of Architecture and Planning,
Malaviya National Institute of Technology, Jaipur (Raj), India
Correspondence Author Email: pjasuja00@gmail.com

Abstract: With the growing population and increasing water

How to cite this paper:
Jasuja,Prernaand
Bhatnagar,
Esha(2021)

Planning strategies forstormwater management
for urban areas: Lessons
for Journal of Global
Resources, Vol. 07 (02)DOI:
10.46587/JGR.2021.v07i02.011

Received: 21 March 2021
Reviewed: 10 April 2021
Revised: 26 April 2021
Final Accepted: 26 May 2021

demand for various purposes in urban areas, the cities fallprey to the water crisis and management issues which
include three components, namely freshwater supply,
wastewater treatment, and stormwater management. Urban
stormwater is surface runoff generated during any rain orsnowmelt. Stormwater management has shifted from beinga technical problem handled by engineers at water utilities toclose integration with urban planning in the USA, Singapore,
and China. This paper highlights such practices in thesethree countries, taking one of their implemented examples. It
intends to discuss and analyze the integration within urban
plans of blue and green infrastructure and the artificial
drainage system in urban areas to maintain stormwater
quantity, quality, water security, and means to keep minimal
damage to nature post-urban development. Indian cities
have yet to address the incorporation of Stormwater
management with their spatial planning. The strategies
applied by the three countries can be used as a learning
lesson in the Indian context.
Keywords: Stormwater Management, Water Sensitive
Planning, Blue-Green Infrastructure

Freely available Online
www.isdesr.org

Journal of Global Resources, July 2021, Volume 07 (02) Prerna Jasuja and Esha Bhatnagar Page 108 | 9

Introduction
Urban Stormwater is surface runoff generated during any rain or snowmelt. Stormwater
management is essential for maintaining the natural hydrological cycle. (Nahar, et al., 2019) It
aims to reduce the runoff and associated soil erosion in streams or lakes, restore them to theoriginal normality, support the human requirements, and recharge the groundwater, aiding thecity’s development. (Boulomytis, et al., 2017)It is necessary to protect the quality of water thatreaches the aquifers and water bodies downstream. The pollutants picked up with stormwaterin Urban land use, if not checked, could damage the water bodies and groundwater quality
and sub-surface water reserves. (Aryal & Naidu, 2010)Stormwater management is necessary
to prevent the risk of flooding & associated economic and life losses. (Nahar, et al.,2019)Stormwater management practices can ensure urban water security. Stormwater as an
asset can make cities self-sustainable with surface or sub-surface collection groundwater
recharge. ( Matto, et al., 2019).
There is a need to consider stormwater management strategies as a prerequisite ofplanning, and countries need to encourage these practices to curb water scarcity. (UNWater,
2007) Indian cities face the issue of stormwater quality and quantity management. India is the
13th most water-stressed country in the world, according to the WRI study of 2013. NITI Aayog
in 2018 declared that the country is suffering from the worst water crisis . (NITI Aayog, 2018)
India can learn from other countries that have a good approach towards stormwater
management.
Methodology
Three countries with an upstanding approach towards stormwater management were selectedin this study, namely, the USA’s Low impact development, Singapore’s Active Beautiful Clean
Program by Public Utility Board, and China’s Sponge city concept. These countries have been
selected because of their exhaustive indicators and norms in integration with urban planningfor stormwater management. For understanding the approach towards stormwater
management in each country, the national and local guidelines by environment agency,
stormwater manuals, groundwater recharge guidelines, with a case study of one city, werestudied. Stormwater quantity, and quality management, water security, and approach to keep
minimal damage to nature post-urban development within an urban area were considered as
fixed parameters on which the analysis was done for each country. Lastly, the strategies wererecommended in the Indian context for integrated stormwater management plans.
Literature StudyUSA
Stormwater management as a concept was introduced in 1972, under the Best Management
Practices, later modified to low impact development or green infrastructure terminology. The
country has various codes within different cities related to stormwater. EPA has the authority
to form and implement stormwater regulations. (USEPA, 2020) Approach from United states
Environment Protection Agency – Stormwater management Practices, Smart growth program,
National Pollutant Discharge Elimination System (NPDES) Stormwater program, Groundwater
protection Strategy, Groundwater action plan, National management measures to Control
Nonpoint Source Pollution from Urban areas were reviewed, and urban planning strategies
were enlisted. The Watershed approach considering rainfall, soil, hydrogeological conditions
exist in EPA guidelines for stormwater management.

Journal of Global Resources, July 2021, Volume 07 (02) Prerna Jasuja and Esha Bhatnagar Page 109 | 9Washington City: The city has an area of 177 sq. km. and receives 664 mm rainfall annually.
(Weather-US, 2020) The town relies on the Potomac River for a water supply for a populationof 7,00,000 approximately. ( DC Water, 2020) ( US Census Bureau, 2019) Due to geographicalconditions with multiple watersheds, stormwater runoff from West Virginia and Pennsylvania
contributes to river water quality in Washington DC. (DC water, 2020) . The soil andhydrogeology of the region show that most of the land is suitable for recharge. (Johnston,1964) The city has a combined sewer system in some areas. It has taken up green
infrastructure measures under the Anacostia river clean plan to check the stormwater quality
and stormwater quantity for managing extreme rainfall with the provision under land-use plans.
( DC office of planning, 2020) The scenario is similar to the Indian context as most Indian cities
have combined conveyance of sewer and stormwater and face urban flooding.

Figure 01: shows the map of Washington DC Green infrastructure planning in areas with the
combined sewer system (Left) & shows the map of Recommended Land use with green
infrastructure within Public and institutional land use
Source left: (DC Water, 2020), right : (DC office of planning, 2020)

Strategies adopted in the USA for Stormwater management and the urban planning
tools used –1. Minimizing damage to nature: Conservation of water bodies, streams, forests in theland use plans and providing adequate buffers near streams has been mentioned in
USEPA guidelines to ensure minimum damage post-urban development. There is aset of guidelines by EPA for local bodies for quality and quantity management ofstormwater. (USEPA, 2020) (Department of Energy and Environment, 2020)
2. Stormwater quality: The EPA suggests the urban plans have compact development
to minimize the impact on the regional water quality as natural areas have intrinsic
values that cannot be retained by simple green infrastructure BMP (USEPA, 2006).
EPA suggests the use of Buffers along the creeks and stormwater drains to protectfrom point source pollution, but the width has not been mentioned. Land use plans canbe used to demarcate buffers, along with allocating possible areas for the industries

Journal of Global Resources, July 2021, Volume 07 (02) Prerna Jasuja and Esha Bhatnagar Page 110 | 9and other surface polluting establishments and checking the discharge water quality.
Land use maps should be prepared by coordinating with the hydrological and soil mapsof the region, which include depth of groundwater, site topography, and contributing
drainage area study, etc. Best management practices could be incorporated by using
such physical features. (District department of environment, Washington DC, 2020) For
instance, the Stormwater Retention Credit Trading Program exists at the municipal
level for reducing harmful stormwater runoff on-site by installing green infrastructure.
These credits can be sold to the sites where owners don’t want to plan with theprovisions. (Department of Energy and Environment, 2020) Separating the sewage andstormwater system can help in improving its quality which has been stated in the DC’sstormwater plan, which aims to improve its urban waterway’s health. Further in the city,
Washington, land use plans allocate an area for green infrastructure for checking
stormwater quality. (District department of environment, Washington DC, 2020)
3. Stormwater quantity: Stormwater drains should be constructed by utilizing hydrology,
topography, natural streams, and water bodies of the region. (USEPA, 2008).
Incentivising citizens through Stormwater Retention Credit Trading Program for future
projects and redevelopment projects to reduce runoff from sites can be another means
to maintain a stormwater quantity check. (District department of environment,
Washington DC, 2020) For instance, major land-disturbing projects are required toretain 1.2” and 0.8” of rainfall on-site, respectively (Center for Watershed protection,2020). This implies that volume-based controls for the discharge-based regulations
need to be implemented to reduce stormwater runoff through municipal regulations orbuilding bye-laws. Solid waste management and separate sewer system to ensure theundisrupted flow of stormwater in stormwater drains.
4. Water security: USEPA has suggested safeguarding recharge areas in master plansby reserving them for blue/green cover for stormwater harvesting. (USEPA, 1984)
Local area zoning, lot sizes for development have been regulated into a few localities
to prevent intensive residential or commercial development over recharge areas undergroundwater protection strategy. Such decisions need to be taken at the onset of land
use planning for the city.
Singapore
The country has an area of 725 sq. km. and receives an annual rainfall of 2430 mm. (Singapore
Land Authority, 2019) (PUB, 2014). The country is one of the most densely populated cities,
with a population of 57,00,000 (Singapore Government, 2020). The country has relied on highrise high-density development because of land scarcity which gives it ease in providing
infrastructure. The island country has no aquifer, so the collection of runoffs is the optimum
solution for fighting water scarcity. The public utility board is the agency to manage thestormwater. Singapore relies on Malaysia (raw water), collected stormwater, treatedwastewater, and desalination to meet its water demand. Singapore has implemented
stormwater management successfully and has used it for potable consumption on a large
scale. “Source-Pathway-Receptor” strategy by the Public Utility Board (PUB) seeks to develop
catchment-wide solutions. (URA, 2019) (PUB, 2014)The city has utilized its runoff as aresource by checking quantity and quality. The model is suitable for island cities, which lackaquifers. (PUB, 2019) (URA, 2019)Indian cities can learn from Singapore’s example to protect
stormwater as a resource. Indian cities could adopt the measures for stormwater quality with

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the aquifer. Stormwater management closely integrates reservoirs and canals into the city
landscape for community and biodiversity in the city.

Figure 02: showing the map of Singapore with protected catchments preserved in the
Master plan from 1971. (Source: Author based on info - (URA, 2019)
Strategies adopted in Singapore for Stormwater management and the urban planning
tools used
1. Minimizing damage to natural features: By delineating the catchment areas in themaster plans, Singapore has achieved catchment-based strategic planning withprotected areas and reservoir placement by considering the hydrogeological andgeographical aspects, including the local precipitation.
2. Stormwater Quality: This can be achieved by a separate conveyance system ofstormwater and sewage with adequate wastewater provision. For instance, Singapore
has a separate provision of collection and treatment for sewage and stormwater, withprecautions being taken at the source, carriers, and receiving areas to minimize
pollution has been made in the city. Nature-based solutions can be used forrecreational land use and urban greens to improve the quality through building by-laws,
city roads, and waterways. “Source-Pathway-Receptor strategy” has been adopted fordecentralized treatment for stormwater quality. It addresses the stormwater collection
network (the pathways for water), the source of surface runoff, and areas where floods
may occur (receptor). (PUB, 2014) The solid waste management system should be
separated from the stormwater system. Land-use control on non-polluting industries
with protected catchments for stormwater harvesting and demarcated protected
catchments with no construction allowed can assure the least contamination of thewater.
3. Stormwater quantity: Preparation of Infrastructure plans by incorporating the
topography and green cover of the region. Local area plans should demarcate thecanals and streams and preserve them with buffer according to peak runoff. Singapore

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uses most of nature’s drainage and constructed hierarchy of manmade drains,diversion canals—widening and deepening of drains and canal with buffer provision tocheck issues of flooding and waterlogging. It is also managing peak runoff by “reduction
at source” strategy through the implementation of on-site detention measures before
discharging it to the public drainage system for all developments greater than or equal
to 0.002 sq. km (PUB, 2014)
4. Water security: 1971 Concept Master Plan and Master plan 2008 of Singapore haveprotected catchments to harvest rainwater marked within the land use. (URA, 2019)
Delineated protected catchments help in reducing the impact from infrastructure
projects.
China
China introduced the concept of Sponge Cities in 2013. It Is stormwater could be conserved,
infiltrated, and purified for reuse, with the benefits of reducing flood risks rectify groundwaterpollution, and increasing water security. (Ministry of Ecology & Environment, China, 2017)
Qunli Stormwater Wetland Park is one of the numerous initiatives taken under China’s spongecity plan. The country’s approach is similar to the USA to mimic natural processes to improvestormwater quality.
Qunli Stormwater Wetland Park, Harbin City, China
Qunli town in Haerbin falls under the Songhua river basin. Qunli town has an area of 27.33 sq.
km. The annual rainfall is 567 mm. The project Turenscape Firm designed the Qunli
Stormwater park project that is spread over 0.3 sq. km. Harbin city faces groundwater pollution
due to urban land use. Before this project, the town suffered through frequent floods andwaterlogging .16.4% of the developed land comprised green permeable space; after thisproject, the three sq. Km. of the area got rid of floods which is ten times the park area.
(Turenscape, 2014)

Figure 03: showing the concept of Qunli stormwater wetland park (left) and land use
Plan of Qunli town (right). (Source: (Turenscape, 2014) (Turenscape, 2014)
A network of pipes runs on the wetland periphery, which collects the stormwater, filters
it through the ponds, and releases it to the park. The project comprises stormwater collection,cleansing, storing, and recharging of the aquifer. The ecosystem of the wetland has recovered
with the inculcation of native plantations in the ponds.

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Strategies adopted in China for Stormwater management and the urban planning tools
used
1. Minimizing damage to natural features: Utilizing green open spaces, wetlands, andurban gardens to manage stormwater quality and quantity considering topography andsoil conditions. Land use Plan to allocate greens for stormwater in Master plan.
2. Stormwater Quality: The project comprises stormwater collection, cleansing, storing,and recharging of the aquifer. Treatment in the source, pathway, and receptor throughnature-based solutions under Open space. Land-use allocation of space for aconstructed wetland in land use plan for collection, cleansing, storing, and recharging.
China is a developing country and aims to improve wastewater infrastructure and solid
waste management in its national plans. There is no specific guideline for discharge
standards. Solid waste management and sewage system are checked under thenational Songhua River Basin Pollution Control Master Plan to prevent stormwaterpollution. (SRBPCMP) (ADB, 2008) Solid waste and separate conveyance ofstormwater and sewage need to be checked in Infrastructure plans.
3. Stormwater quantity: Increasing Stormwater coverage is addressed in National plans.
The country targets 80% of urban areas collecting 70% of the rainwater by 2030 bySponge city concept 10% of green sponge has solved flooding in the Qunli city. (ADB,2008) Taking the opportunity of existing green spaces and planning sponges forstormwater to manage quantity. Enhancing drainage capacities to manage stormwater
quantity has been addressed under the National Plans. Adequate Stormwater
infrastructure
4. Water security: Sponge city concept aims at replenishing groundwater by naturally
treating stormwater infiltration. The Qunli wetland currently has a filtrating and retaining
capacity of 500,000 m3. The data regarding recharge was not available for the city.
(Turenscape, 2014) Groundwater recharge through planned sponges in the master
plan.
Analysis from the Case Studies
1. Minimizing damage to natural features: In all three countries, stormwater
management is being implemented by the catchment or watershed approach byconsidering local topography, hydrogeology, and soil conditions. Approach of USEPA
and Singapore’s PUB to reduce the impact of development by minimizing the damage
to natural lands, forests and protecting the water bodies and streams with adequate
buffers. USEPA promotes the preservation of recharge suitable areas, and Singapore,through protected catchments, shows how to minimize the impact on nature. Thoughdensity is a BMP by the USA, Indian cities can adopt compact development bychecking density in the master plan for ease in infrastructure provision for urban
services.
2. Stormwater Quality: The three countries have an approach of improving wastewater
infrastructure with a separate conveyance system of stormwater and sewage andchecking solid waste management by the urban local body to ensure stormwater
quality. There is a variation in discharge standards in the countries. In India, municipal
solid waste management by local bodies should be ensured for stormwater quality, andit has significantly improved after Swach Bharat Abhiyan. However, the country has toimprove its wastewater infrastructure significantly. Allocation of spaces for green
infrastructure might vary in urban plans according to goals, standards, and technology

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applied to achieve the same. Nature-based solutions for source, pathways, andreceptors could be planned within the master plans.
3. Stormwater quantity: The three case studies encourage preserving the naturaldrainage channels and water bodies, utilizing them to collect all stormwater runoff alongwith human-made drains. India can overlook the possibility of Sponges within the city,which can help in the issue of urban flooding and associated losses. Solid waste
dumping and sewage dumping into waterways are discouraged as it reduces the
carrying capacity of the drains. India should promote on-site rainwater harvesting forlarge-scale developments and reuse stormwater on sites by incentives on stormwatercess or credits through building by-laws or municipal regulations to reduce the existingstormwater infrastructure system load.
4. Water security: After the geological assessment, safeguarding high recharge areas inmaster plans for stormwater harvesting and checking the development as seen in the
USEPA guidelines is the most appropriate strategy. The proposed development within
the master plan will stay for years, and sensitive recharge areas would be hard to revive
if not preserved. This approach requires institutional integration between various
departments such as the groundwater department and development authorities. In
China’s sponge city, the groundwater recharge approach by restoring the wetland andutilizing urban greens can be adopted in India. In case of no aquifer availability,
stormwater storage could be adopted, as seen in Singapore. Singapore’s model could
be adopted in the island and coastal cities where recharge conditions are not present.
Conclusion
The strategies can be applied if stormwater management is addressed in the initial phase of
master planning. The countries look forwards to blue-green infrastructure or nature-based
measures instead of the conventional approach of constructing tunnels and drains. The
approach as seen will vary because of geological, soil, topographical differences in thewatersheds. Economic efficiency & environmental sustainability are achievable through suchstrategies. There is a need to integrate such strategies in urban planning through various tools
and perspective plans such as master plans, city infrastructure plans, and building bye-laws
with the proper framework in India.
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