Assessing the effectiveness of green urban infrastructure on urban heat island mitigation in developing cities

Project Abstract

This study evaluates how green urban infrastructure (GUI) affects urban heat island (UHI) intensity and distribution in rapidly developing cities, integrating remote sensing, field measurements, and stakeholder perspectives to provide actionable guidance for policy and planning. By combining Landsat-derived land surface temperature (LST) data with in-situ air temperature and humidity measurements across diverse urban morphologies, the research quantifies the cooling effects of GUI elements, including green roofs, vertical gardens, street trees, permeable pavements, and urban wetlands. A mixed-methods framework is employed to correlate GUI canopy density, evapotranspiration rates, albedo changes, and surface roughness with fluctuations in UHI magnitude during peak summer periods and heatwave events. Temporal analyses spanning five years capture seasonal dynamics and the lag between GUI implementation and observable cooling, while spatial analyses using high-resolution drone imagery and GIS-based land-use classifications assess hotspot mitigation and equitable distribution of benefits across socio-economically diverse neighborhoods. The study also investigates the co-benefits of GUI—stormwater attenuation, air quality improvement, biodiversity enhancement, and energy demand reductions—through a multisectoral modeling approach that links microclimate modifications to building energy consumption and public health indicators. Through stakeholder interviews and policy document reviews, barriers to GUI adoption, financing mechanisms, maintenance regimes, and governance structures are identified, enabling the development of a scalable decision-support framework. Preliminary findings indicate that mature, well-distributed canopies with optimized ventilation corridors yield the most pronounced reductions in LST and ambient air temperatures, while roof and wall gardens contribute substantively to thermal comfort in high-rise districts. However, heterogeneity in building density, albedo of surrounding surfaces, irrigation infrastructure, and maintenance capacity moderates cooling benefits, underscoring the need for context-specific GUI portfolios and long-term monitoring. The research develops empirical transfer functions linking GUI extent to UHI metrics, and develops scenario-based projections to inform urban planning under climate change trajectories. It further proposes a prioritized investment ladder that aligns GUI deployment with heat exposure risks, urban form, and budgetary constraints, and offers policy recommendations for integration into building codes, zoning regulations, and green infrastructure standards. The expected outcomes include a validated methodological framework for UHI assessment in developing cities, quantified estimates of cooling benefits under various GUI configurations, and a set of actionable guidelines to maximize thermal resilience, protect vulnerable populations, and advance sustainable urban development. The study contributes to the body of knowledge on nature-based solutions in urban climate adaptation and provides decision-makers with robust evidence to optimize GUI designs for maximum cooling, co-benefits, and equity.

Project Overview

What This Project Is About

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A plain-language overview of how greenspace and other eco-friendly urban features can lower city heat, improve air, and make neighborhoods more comfortable. The project looks at how planting trees, green roofs, and other green infrastructure help reduce heat in developing cities where heat problems tend to be severe and resources are limited.

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The Problem It Addresses

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Many cities suffer from urban heat islands—urban areas that are hotter than surrounding rural areas—due to dense buildings, dark surfaces, and limited greenery. In developing cities, heat worsens health risks and energy costs. The project investigates whether green infrastructure can meaningfully reduce temperatures and related problems.

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Objectives of the Project

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1. Identify which green infrastructure features are most effective at lowering urban temperatures in the local context.
2. Measure changes in microclimate before and after implementing greenspace interventions.
3. Assess co-benefits such as improved air quality and energy savings.
4. Provide practical guidance for policymakers and planners in developing cities.

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What You Will Do Step by Step

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1. Review existing literature on urban heat islands and green infrastructure.
2. Select a study area in a developing city and map current greenspaces and heat patterns.
3. Collect temperature, humidity, and basic air-quality data across different sites and seasons.
4. Introduce or simulate green interventions (e.g., trees, green roofs) if feasible.
5. Analyze data to compare temperatures and energy indicators with and without greenspace.
6. Discuss results, limitations, and policy implications.

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Expected Outcome

Outcomes include a clear understanding of which green features work best, practical recommendations for city planners, and a framework to evaluate future green projects for cooling and health benefits.