How Harvard Landscape Architects Work with Nature’s Furriest Engineers

Why It Matters

Partnering with beavers transforms wetland restoration into a self‑sustaining, climate‑resilient solution, delivering flood protection and biodiversity gains with minimal human intervention.

Key Takeaways

• Harvard GSD integrates beaver behavior into wetland design
• Simulated beaver canals guide animals to build natural dams
• Field trials show beavers and wildlife respond to engineered incisions
• Collaborative design treats animals as co‑authors of landscape projects
• Nature‑based solutions boost flood resilience and biodiversity in wetlands

Summary

Landscape architects at Harvard’s Graduate School of Design are pioneering a new paradigm that enlists beavers—nature’s engineers—to shape resilient wetlands. By studying beaver dam‑building and canal‑cutting, the team is developing design tools that work with, rather than against, natural processes.

The researchers first built digital simulations of beaver construction to identify the minimal landscape cues that trigger animal activity. In the field they created small incisions that mimic the start of a beaver canal. Within days, beavers arrived, expanded the cuts into full‑scale channels, and erected dams that flooded the site, creating ponds and riparian habitat. Parallel observations recorded increased insect activity and the presence of larger mammals, confirming a cascade of ecological benefits.

“​This is a new way to do landscape architecture,” a project lead remarked, emphasizing the shift from human‑only design to co‑authorship with other species. The experiments demonstrate that modest, strategically placed earthworks can serve as a communication signal to beavers, effectively outsourcing engineering work to the animals themselves.

If scalable, the approach offers municipalities a low‑cost, self‑maintaining tool for flood mitigation and biodiversity restoration. By leveraging beaver activity, cities could reduce reliance on concrete levees, lower maintenance budgets, and meet climate‑adaptation targets while fostering healthier ecosystems.

Original Description

At the GSD, faculty and students are rethinking how to address climate change by designing interventions that work with natural processes.

To improve wetland health and biodiversity, Karen Lee Bar-Sinai, assistant professor of landscape architecture, and Jordan Kennedy, a former research fellow, have enlisted an unexpected partner: the beaver. With strategically placed cuts in the landscape, Bar-Sinai and Kennedy encourage beavers to engage in their innate excavating behaviors, creating dams, canals, and ponds that enhance water quality, reshape hydrology, and support a range of wildlife, from birds to bears.

This research lays the groundwork for future interventions—including, potentially, the design and fabrication of a robotic device that, mimics beaver behavior and extends the impact of these strategies beyond what living beavers alone can achieve. Together, these investigations represent a bold approach to landscape architecture—one in which humans learn from and collaborate with other species to help heal the planet.

This research was conducted in partnership with the Beaver Institute and made possible by the Center for Green Buildings and Cities Research Grant, GSD Faculty Research Grant, LUMA Foundation Research Grant, and the GSD Brown-McCann Award.

Video by Maggie Janik