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Nature-Based Solutions Case Study Search

This database contains over 400 implementations of nature-based solutions. Use the filters to identify the case studies most relevant to you.

While all cases here exemplify applications of NBS strategies, they were gathered from various sources and not all were written using the framing of nature-based solutions. To qualify as a nature-based solution, a project must provide benefits to both people and nature. In some instances, the human benefits are present but not emphasized in the case write ups; these cases were included because they still provide useful information to learn from.

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In northern Wisconsin, tribal foresters from the Menominee Nation are working to speed regeneration of more than 200,000 acres of forest areas that have been treated for invasive diseases like oak wilt. Their efforts are also creating forests that are better adapted to future conditions.

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Greater sage-grouse (Centrocercus urophasianus) populations are declining in Utah and other western states due to the degradation of their seasonal habitats from the encroachment of pinyon-juniper trees. This project evaluated the ecological viability of using "lop and scatter" methods to mechanically remove encroaching PJ trees to manage sage-grouse winter habitat at a study site in Ashley National Forest.

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Encompassing some of the wildest and least populated territory in the state, the Klamath region of Northern California faces threats from invasive species in its wildland ecosystems. To protect the forests and rivers, restoration efforts began by applying county-scale mapping tool to identify and treat high-priority eradication target.

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The Apache-Sitgreaves National Forest (ASNF) utilized over 25 million funding from the American Recovery and Reinvestment Act (ARRA) to support projects that increase local employment, support forest restoration and fire mitigation, and boost local economy. Projects included forest restoration and fuels reduction, recreation and related road improvements, forest fire rehabilitation efforts, and greenhouse construction on the Fort Apache Indian Reservation.

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This project, implemented by the NC Division of Water Quality and NC Division of Forest Resources, aimed to reduce nitrogen and mercury loading of downstream waters in the Albemarle/Palmico estuary system by restoring wetland hydrology and native bog vegetation to a 640-acre research area. Activities included installation of water-control structures and replanting 100,000 trees.

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The first wildlife overpass was constructed by the Canadian government in Banff National Park in 1982 to reduce wildlife collisions. Till 2022, six overpasses and 38 underpasses have been constructed across Banff, reducing wildlife collisions by 80 percent. The project started with opposition and criticism from the public doubting whether animals would use the structure.

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Bird Track Springs is a 2-mile reach of the Upper Grande Ronde River in eastern Oregon that has been degraded and altered by human activity. The once multi-threaded, well-connected river and floodplain became a single-threaded river with little connectivity and degraded habitat. This project aims to reconnect the river to its floodplain, increase habitat complexity, and restore salmonid populations. 

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BLM is leading the construction and maintenance of a system of up to 11,000 miles of strategically placed fuel breaks to control wildfires within a 223-million-acre area in the Great Basin that includes portions of Idaho, Oregon, Washington, California, Nevada and Utah. Fuel breaks would be implemented along roads or rights-of-way on BLM-administered lands.

NBS Strategies:
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To eradicate the Asian longhorned beetle (ALB), in 1999, USDA and USFS developed a 10-year plan in 1999 that follows five stages: phase-in, delimitation, and containment; suppression and control; deregulation; and eradication. All infested trees were either removed and replaced by non-ALB host trees on a one-to-one basis or treated with the insecticide Imidacloprid via trunk or soil injection.

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The Montezuma quail’s (Cyrtonyx montezumae) primary habitat is Madrean oak woodlands. These habitats are degrading from the impacts of climate change and habitat destruction. This project aims to restore Madrean oak woodlands and Montezuma quail populations through a partnership of Sonoran Joint Venture, Borderlands Restoration Network, and Southern Arizona Quail Forever.  

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Starting in 2013, the emerald ash borer (EAB) has been detected in Colorado, spreading throughout most of the North American ash (Fraxinus). The City of Fort Collins updated the tree inventory on public properties and aimed to treat 2,100 ash trees using pesticides (Emamectin benzoate) or mechanical removal, while replanting more resilient trees over a 3-year period.

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Sandstone glades of the Southern Cumberland Plateau are rare and unique plant communities exhibiting some of the richest endemic floras in the eastern United States. As a part of larger conservation initiative to rehabilitate and reconnect glade patches with the surrounding forest ecosystem, USFS at William B. Bankhead National Forest conduct a pilot project on a 3-acre glade.

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Encompassing 100 acres of tallgrass prairie converted into agricultural land and 60 acres of woodland along a creek, Homestead National Historical Park underwent restoration by the National Park Service in 1939 to address severe erosion and improve water quality and soil productivity to support native plants and wildlife.

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Following a devastating 2010 wildfire and post-fire flood outside of Flagstaff, city residents approved a $10 million bond to support forest restoration work to reduce the risk of wildfire and post-fire flooding. This bond created the Flagstaff Watershed Protection Project (FWPP), which implements restoration projects like thinning and fuel reduction.  

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This project was initiated by BC Wildlife Services (BCWS) in 2019 to evaluate the degree to which fuel treatments have been effective in changing wildfire behavior. Two fuel treatments were studies: 1) manual treatment of older stands involving stand thinning, debris disposal + pruning, and 2) broadcast burning after timber harvesting.

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The Carson National Forest (CNF) is at risk for high-intensity wildfires. Mimicking the Acequias traditional water-management system, the Cerro Negro Forest Council (CNFC) created forest mayordomos, or local managers who are a a pillar with local knowledge and heritage to serve the community within the Pueblo and Hispanic communities of northern New Mexico.  

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Intensive campground use at the Grant Grove area of Kings Canyon National Park, California, has compacted the soil and left areas without understory vegetation or tree recruitment. To better inform the restoration of these sites after closure, natural regeneration potential was tested against planting and soil restoration methods.

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To restore forest health and an ecological and climate-adapted fire regime, staff at Lassen Volcanic National Park (LAVO) in northern California partnered with the Sierra Nevada Conservancy and Sierra Institute in 2019 to reduce forest fuel loads within wilderness areas of the North Fork Feather River watershed.

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The Fort Valley Project was an experiment designed to test forest treatments that were intended to restore natural ecological qualities and reduce the hazard of intense wildfire in the urban/wildland interface around Flagstaff, Arizona. The primary goal of the project was the reverse the degradation of ponderosa pine ecosystems by restoring their structure and function along with the natural disturbance regimes that were characteristic of their evolutionary environment.

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In 2015, the Gila Watershed Partnership (GWP) began work to restore native vegetation in 200 acres of tamarisk-dominated habitat along a 54-mile stretch of the Upper Gila Watershed. The goal was to create islands of native vegetation to act as refugia for threatened and endangered species and reduce tamarisk beetle impacts on flycatcher habitat.

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