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Ecological Intelligence

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Ecological Intelligence / Subject

planning

Latin America & Caribbean

A Colombian watershed model maps flood and landslide risk with green infrastructure options

Evidence
Peer-reviewed spatial planning model
Geography
Guarapas River catchment, Huila, Colombia
System
Tropical catchment / blue-green infrastructure

WHAT THE EVIDENCE SAYS

Weighted multicriteria overlays identify more than 60% of the catchment as suitable for at least one blue-green measure; historical hazard records were used for validation. The paper's up-to-55% risk-reduction claim is from modelled scenarios, not deployed projects.

WHY IT MATTERS / OUR READ

This is an approach for targeting capital in data-poor catchments, but the next test is field hydrology, maintenance and institutional feasibility.

CAVEATS / UNCERTAINTY

Risk reduction is simulated and depends on scoring weights and input resolution, not measured performance after construction.

SOURCE

Sustainability and Climate Change · original spatial decision model
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A planning framework links hazard records with places for forest, floodplain, pond and wetland investments.

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Peer-reviewed Global

Cities can help create the extreme rain they are trying to drain

Evidence
Peer-reviewed
Geography
Global urban systems
System
Urban atmosphere / stormwater landscape

WHAT THE EVIDENCE SAYS

A Nature Cities review synthesizes observations, theory and modeling on the urban-rainfall effect. It concludes that cities can alter atmospheric dynamics in ways that intensify short-duration extreme rainfall, with the magnitude and spatial pattern varying by city form, climate, storm type and scale. The authors frame urban growth and rainfall extremes as a coupled, co-evolving system rather than treating rainfall as an external forcing on static infrastructure.

WHY IT MATTERS / OUR READ

For planners and landscape designers, the implication is that stormwater capacity and green-blue infrastructure may be responding to a hazard partly modified by the urban fabric itself. Future risk assessment should test local rainfall feedbacks rather than simply applying regional precipitation change to a fixed city.

CAVEATS / UNCERTAINTY

This is a synthesis of a heterogeneous literature, not evidence that every city intensifies every storm. Effects are spatially variable and scale-dependent, and local attribution remains difficult; planning applications require city-specific observations and models.

SOURCE

Nature Cities — review
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A new synthesis finds that expanding urban form can modify atmospheric dynamics and intensify short-duration rainfall, making urbanization part of the hazard as well as part of the exposure.

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Peer-reviewed

In Wuhan, the cooling value of green space depended on what surrounded it and who lived nearby

Evidence
Peer-reviewed
Geography
Wuhan, China
System
Urban land–water mosaic

WHAT THE EVIDENCE SAYS

A WRF–urban-canopy modeling study of central Wuhan evaluated green-space cooling during a clear, calm July 2018 heatwave at 333-m resolution. Trees generally delivered the highest cooling efficiency, while wind direction, the Yangtze River and the spatial distribution of people and existing green space changed where marginal cooling benefits were greatest.

WHY IT MATTERS / OUR READ

Urban greening is not only an acreage question. Placement, vegetation type, water, airflow and population exposure can change the value of the same area of green space, making heat adaptation a landscape-configuration problem.

CAVEATS / UNCERTAINTY

The results are modeled counterfactuals tied to one heatwave and contemporaneous land-cover and population data. Cooling performance is not a biodiversity measure, and transfer to other cities requires local climate, morphology and water-context validation.

SOURCE

Landscape Ecology
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A 333-m urban-climate model found trees generally cooled more efficiently than grass, but airflow, nearby water, population density and where green space was scarce changed where each hectare mattered most.

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Peer-reviewed

Change the map scale and Hangzhou Bay’s ecological trend changes with it

Evidence
Peer-reviewed
Geography
Hangzhou Bay Urban Agglomeration, China
System
Urban / coastal metropolitan landscape

WHAT THE EVIDENCE SAYS

A Google Earth Engine analysis tracked a remote-sensing ecological index from 2000–2024 at 1-, 3-, 5- and 10-km grids and county scale. The regional RSEI increased by about 0.0423 overall, but the share classified as improving rose from 75.34% at 1 km to 84.25% at county scale, demonstrating how aggregation can hide opposing local trajectories. Land-use intensity was the strongest SHAP contributor in the explanatory model.

WHY IT MATTERS / OUR READ

For metropolitan ecological planning, scale is part of the result. County or city averages can be useful for screening, but site and corridor decisions need nested spatial analysis so local degradation is not erased by improvement elsewhere.

CAVEATS / UNCERTAINTY

RSEI combines greenness, wetness, dryness and surface temperature; it is not a direct biodiversity or ecosystem-integrity measure. The study is observational and cannot assign causal effects to land use or policy, and its machine-learning validation was not designed as a strict spatial or temporal holdout test.

SOURCE

Frontiers in Ecology and Evolution
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A 25-year remote-sensing analysis found coarse administrative units made improvement look more widespread while hiding local opposing trends along urban corridors and the bay.

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Government data North America

A Queens schoolyard is being rebuilt as stormwater infrastructure

Evidence
Government data
Geography
Jackson Heights, Queens, New York City, USA
System
Urban schoolyard, stormwater and public-space infrastructure

WHAT THE EVIDENCE SAYS

New York City opened the redesigned P.S. 69 schoolyard on September 18 after a roughly $1 million investment. The project combines a new play and athletic landscape with subsurface stormwater storage designed to capture, hold and slowly release up to about 260,000 gallons of runoff per year, alongside drainage improvements, shaded seating and community access in a neighborhood with relatively little park space.

WHY IT MATTERS / OUR READ

The design is a useful city-landscape example because it asks one small public site to perform several jobs at once: recreation, neighborhood open space and distributed stormwater control. The ecological-performance question now moves to post-occupancy measurement—how much runoff is actually retained, how the site performs during extreme rain and whether maintenance preserves that function.

CAVEATS / UNCERTAINTY

The 260,000-gallon figure is a design estimate, not a measured annual post-construction result. The site uses synthetic turf and is primarily hydrologic and social infrastructure rather than a biodiversity restoration, and broader heat, habitat or public-health benefits have not yet been independently evaluated.

SOURCE

New York City Department of Environmental Protection
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New York City’s redesigned P.S. 69 schoolyard combines recreation with subsurface stormwater storage intended to reduce street flooding and combined-sewer pressure in park-poor Jackson Heights.

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