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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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The Dolores River Restoration Partnership, Escalante River Watershed Partnership, Gila Watershed Partnership, Verde Watershed Restoration Coalition, and Virgin River Coalition formed a partnership to restore riparian lands across the Colorado River basin. These organizations work to control invasive species, improve terrestrial and aquatic habitats, and reduce erosion. 

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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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The masked bobwhite quail (Colinus virginianus ridgwayi), a former popular game bird, has been locally extinct in the U.S. Sonoran Desert since the 1990s due to livestock overgrazing and drought. Invasive grass species further degraded their habitat. Buenos Aires National Wildlife Refuge was established for the reintroduction of masked bobwhite quail and habitat restoration. 

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26,000 acres of Eastern Mojave Desert near Las Vegas, Nevada, is a specially managed area that receives Mojave Desert tortoises (Gopherus agassizii) translocations. A 2011 Revised Recovery Plan aims to increase population densities of the tortoise by increasing native plant coverage and reducing invasive plant presence. 

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Non-indigenous crayfish species (NICS) cause widespread ecological damage throughout European waterways. They negatively impact native species through competition, predation, and disease transmission. The Swiss Coordination Office for Crayfish was formed in 2014 to address this issue in Swiss waterways by conducting research, informing local governments, and informing the public.  

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The Dolores River Restoration Partnership (DRRP) is a public-private collaborative working to restore ecosystems and plant communities in the Dolores River corridor. Invasive plants in this region have degraded habitat for both native plants and wildlife, increased wildfire risk, and negatively impacted recreational opportunities. The project has four broad goal categories: ecological, social, management, and economic. 

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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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In response to the floods following tropical storm Irene, and the potential for a significant increase in the Japanese knotweed popuation, the state of Vermont hired a coordinator to develop and carry out an early detection & rapid response (EDRR) work plan to eliminate as many of these new plants as possible, using only manual labor.

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In 1992, Congress passed the Elwha River Ecosystem and Fisheries Restoration Act, authorizing the removal of dams to restore the Elwha River's altered ecosystem. The Elwha Dam and Glines Canyon Dam were removed in 2011, allowing water to flow freely from the Olympic Mountains to the Strait of Juan de Fuca.

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The Nature Conservancy aimed to restore 7,100 acres of farmland in Emiquon into a functional floodplain that sustains native species. In 2007, 180,000 trees, 8,000 pounds of seed, and 90,000 upland shrubs and trees have been planted in 1,400 acres of Emiquon. Non-native fish have been removed and native fish have been introduced into these new waters.

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The Nature Conservancy led the project to restore 7,100 acres of farmland to functional flood plain and return its ability to sustain native plant and wildlife species. In 2007, 180,000 trees, 8,000 pounds of seed, and 90,000 upland shrubs and trees have been planted in 1,400 acres of Emiquon.

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This project is a large-scale, multi-agency Effort to eradicate the infestations of the invasive strain of the tropical marine alga, Caulerpa taxifolia from two sites in California. At the time when no technique had been demonstrated effective to treat the infestations, the team chose to apply chlorine bleach treatment.

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Havasu National Wildlife Refuge is threatened by a large population of invasive Feral Swine (Sus scrofa). Feral Swine negatively impact native vegetation and wildlife, cause damage to human property and infrastructure, and are a public health and safety threat. In 2016, refuge staff and many collaborators began to work towards Feral Swine eradication within the refuge.  

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The BLM led the restoration of sagebrush steppe and riparian plant communities on 75,000 acres of Eastern Oregon rangeland. Treatment focuses on removing western juniper, a desert conifer species that is spreading across the landscape and outcompeting other desert plants. Restoration efforts used a sequential, three-step approach: juniper cutting, controlled burns, and in some cases, aerial reseeding.

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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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Faced with the decline of urban trees, concerned group formed an initiative to enhance urban tree that help reduce the impact from urban heat, heavy rainfall, and local flooding. Partnering with expert from U.S. Forest Service, the group assessed vulnerability of over 150 tree species in the region and implemented a project to protect native trees from pests and climate change.

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The Fossil Creek watershed ecosystem has been drastically impacted by a diversion dam that was built in the early 1900s. The restoration of the stream course started in 1999 when Arizona Public Service (APS) signed an agreement to decommission its hydroelectric facilities along Fossil Creek.

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The Fowl Meadow Purple Loosestrife Biological Control Project is a five-year collaborative wetland restoration project in the Neponset River Watershed, Massachusetts. The project uses Galerucella calmariensis and G. pusilla beetles and larvae as a biological control agent to control and reduce the presence of exotic, invasive Purple loosestrife (Lythrum salicaria).

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Led by the Texas Parks and Wildlife Department (TPWD), this project aimed to apply the integrated pest management (IPM) approach to control the invasive giant salvinia (Salvinia molesta) in Lake Raven, a 203-acre reservoir located in the Huntsville State Park, Texas.

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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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