Urban areas face increasing pressure from stormwater runoff, polluted waterways, and limited open space. Integrating wetlands into Green Infrastructure (GI) systems helps cities capture runoff, filter contaminants, and restore ecological functions. These systems improve water resilience while creating accessible recreational landscapes for nearby communities. Explore how the Urban Orchard Project in South Gate demonstrates these principles in practice against international benchmarks.
Urban Wetland Green Infrastructure Systems
Urban GI systems integrate natural processes into engineered urban landscapes to manage stormwater and improve water quality. Urban wetlands form a central component within these systems because they store runoff, filter pollutants, and slow water movement. GI networks often combine wetlands with permeable surfaces, vegetated channels, and infiltration areas. This distributed approach reduces pressure on conventional drainage infrastructure. It also improves watershed health while creating functional public spaces.
Stormwater Capture and Pollutant Filtration Mechanisms
Urban wetlands function as biological filtration systems that treat stormwater before it reaches rivers or coastal waters. Runoff from streets, roofs, and parking areas often contains oils, heavy metals, pesticides, and sediment. Wetland soils and vegetation capture these pollutants through sedimentation, microbial processes, and plant uptake. Water then infiltrates into underlying soils or moves slowly through vegetated channels. This process improves downstream water quality and reduces pollutant loads entering impaired waterways.
Distributed Storage and Groundwater Recharge
GI systems increase urban water resilience by capturing stormwater close to where it falls. Wetlands and permeable landscapes temporarily store runoff during rainfall events. Stored water gradually infiltrates into soils, which supports groundwater recharge in suitable geological settings. This distributed storage reduces peak flows in drainage channels and lowers flood risk. Municipal water systems also benefit when recharged aquifers supplement long term supply reliability.
Community Space within Water Management Infrastructure
Urban wetland GI projects often combine water management with recreational and social infrastructure. Designers incorporate walking paths, open lawns, and habitat features within stormwater landscapes. These multifunctional spaces transform underused or degraded sites into public parks. Communities gain access to green space while cities improve environmental performance. This integration helps align infrastructure investment with public health, climate adaptation, and neighborhood revitalization goals.
Case Study: Urban Orchard Project, South Gate, California
The Urban Orchard Project in South Gate demonstrates how stormwater infrastructure can support water quality improvement, groundwater recharge, and community revitalization. The project occupies a former industrial site located between a concrete section of the Los Angeles River and Interstate 710. It converts the underused parcel into a 30 acre multi use park that integrates wetlands, bioswales, and permeable landscapes.
The system diverts stormwater and urban runoff from the Bandini Channel into constructed wetlands and vegetated infiltration areas. These features capture and store millions of gallons of runoff each year. Wetland vegetation and soils filter contaminants such as oils, pesticides, heavy metals, and urban debris. This treatment process reduces pollutant flows entering the Los Angeles River, which appears on the state list of impaired or threatened waters.
The initiative operates under California’s stormwater management framework and received partial financing through the State Water Resources Control Board Stormwater Grant Program. The project secured an $8 million dollar grant funded through Proposition 1 water bond allocations. Proposition 1 authorized $7.5 billion dollars in statewide funding for water infrastructure, ecosystem restoration, watershed protection, and drinking water improvements. The State Water Resources Control Board administers these funds and supports local project implementation.
Design features also support groundwater recharge and public recreation. Permeable surfaces and infiltration areas allow captured stormwater to percolate into local aquifers. At the same time, the park provides open space, recreational facilities, and ecological habitat within a dense urban community of about 100,000 residents. By linking water quality improvement with public amenities, the project demonstrates how stormwater infrastructure can deliver environmental and social benefits.
Take-Out
Urban wetlands integrated within GI systems enable cities to capture runoff, improve water quality, recharge groundwater, and create multifunctional public landscapes that strengthen long term water resilience.
Circular Economy and Liveable Cities (Cambridge University Press)
The Circular Economy and Liveable Cities, edited by Robert C. Brears, Our Future Water, has been published. This essential guide delivers actionable strategies and best practices for implementing circular economy, climate resilience, and sustainability in urban environments, with global examples from leading cities like Tokyo, New York, and Singapore to help planners, policymakers, and researchers build liveable and sustainable cities for the future.
2nd Edition of Nature-Based Solutions to 21st Century Challenges (Routledge)
Fully revised and updated, the second edition of Nature-Based Solutions to 21st Century Challenges by Robert C. Brears offers a timely and systematic review of how working with nature can address today’s most pressing environmental and societal issues. Featuring new case studies from across the globe, expanded insights on public policy, AI, and community-led initiatives, this edition is essential reading for anyone shaping a sustainable future.
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Shape the Future of Sustainability: Contribute to Springer Nature’s Landmark Publications
As Editor-in-Chief, Robert C. Brears invites experts, researchers, and practitioners to contribute to impactful and forward-thinking publications from Springer Nature. These comprehensive Handbooks and Encyclopedias explore Nature-Based Solutions, sustainable resource management, ecosystem well-being, and the global energy transition.
- Palgrave Handbook of Nature-Based Solutions
- Palgrave Encyclopedia of Sustainable Resources and Ecosystem Resilience
- Palgrave Handbook of Ecosystems and Human Well-Being
- Palgrave Handbook of Energy Transition and Renewable Energy
- Palgrave Handbook of Urban Climate and Disaster Resilience
- Palgrave Handbook of Social Transformations in Science, Innovation, and Education
Shape the Future of Climate Resilience: Contribute to Palgrave’s Pivot Series (Springer Nature)
As Series Editor, Robert C. Brears invites experts to contribute to Palgrave Studies in Climate Resilient Societies, a leading Pivot series (25,000–50,000 words) exploring climate resilience, policy innovation, and sustainability strategies.
For more details, visit: Seeking Authors — Palgrave Studies in Climate Resilient Societies
Explore the Full Book Collection on Nature-Based Solutions (NBS)
Harness the power of nature to tackle today’s climate and development challenges. Curated by Our Future Water and Global Climate Solutions, this collection offers practical frameworks for embedding NBS into policy, planning, and implementation.
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