Nairobi Reservoir Rehabilitation Project Photo Essay
November 1, 2021

In September 2021, Patrick Odhiambo and Ben Buhl of Ecologists Without Borders (EcoWB) toured the Nairobi Reservoir and Dam in Nairobi, the world-class capital of the Republic of Kenya in Africa. What Patrick, a seasoned environmental remediation specialist, and Ben, a widely traveled and accomplished photojournalist, observed was disturbing; trash including discarded plastic and other solid waste was being transported by wind and water to the reservoir where it has engulfed large areas adjacent to the surrounding informal settlement of Kibera. Home to over 350,000 people, Kibera is one of the largest such settlements in the world. With no land to spare, people have built homes and planted gardens around the entire perimeter of Nairobi Reservoir, trusting that they won’t be washed away by periodic flooding of the Nairobi River and its tributaries. 

  

Severely polluted and overgrown by the pernicious and seemingly un-eradicable water hyacinth, a non-native aquatic weed originally found in the Amazon Basin, Nairobi Reservoir poses serious health risks to nearby residents. It is no longer suitable for agricultural, domestic, or recreational use. Left untreated, the ongoing inputs of municipal and industrial waste risk bringing disease, and further environmental degradation to the Kibera community. Something must be done soon to avoid further environmental and societal impacts to the residents of Kibera.

 

EcoWB is working with Empower the Community (ETCO), a youth-focused Community Based Organization (CBO), founded and headquartered in Kibera, and has reached out to other CBOs) and governmental entities to launch a large-scale project to restore the environmental integrity and associated beneficial uses of the of Nairobi Reservoir to their former condition. 


During their visit in September 2021, Ben and Patrick, escorted by ETCO founder and Chairman Collince Onyango, met with officials at the Nairobi West Prison, located near the dam, and later, with the Kounkuey Design Initiative (KDI) and New Nairobi Dam Community group (NNDC), both long-active and influential CBOs based in Kibera. Together with ETCO, EcoWB has begun to formulate a vision and plan to engage sponsors and residents of Kibera in the rehabilitation of Nairobi Reservoir. Our first planned activity is modest but very symbolic; EcoWB and ETCO are partnering on a series of one-day community clean-up events. With the goal of removing trash, planting trees, and restoring the natural features of sections of reservoir and tributary shorelines, this initial partnership aims to engage local residents and instill civic pride through the restoration of clean and usable open spaces and associated environmental amenities. 


So that you may help us address the many challenges faced by the Kibera community, we invite you to join us as a financial sponsor of the Nairobi Reservoir Restoration Project (NRRP). To familiarize yourself with the conditions that currently exist, and to help us develop a strategic plan to restore the reservoir to a semblance of its former state, please take time to view the following photo and video essay. We believe that by bearing witness to the problem, you will feel compelled to support this critical effort. If you would like to be notified of future volunteer opportunities related to this project, please register as a volunteer on our website at  https://www.ecowb.org/ecowb-volunteers . 

 

To support the project with a financial contribution, please visit our donation page  and select “Project: Nairobi Reservoir Rehabilitation Project” from the drop-down menu. We appreciate your support. 

Outlet from the earthen dam with flow to nearby Mbagathi River.

Dense growth of vegetation in what was previously open water of the Nairobi Reservoir. 

With over 250,000 residents, Kibera is the largest slum in Africa, and the fourth largest in the world. Large quantities of waste, including discarded trash, human feces and other hazardous substances, are conveyed via ditches and natural waterways into Nairobi Reservoir.

EcoWB’s Patrick Odhiambo and ETCO’s Collince Onyango survey a section of the Motoine/Ngong River that flows through Kibera. This river segment lies approximately 200 meters west of Nairobi Reservoir, and is the site of a future clean-up event being planned by EcoWB, Nairobi Metropolitan Services, ETCO, and other local organizations. 

Managing the Mangroves of Jiquilisco Bay: Science, Collaboration, and Community

November 5, 2025
Since 2023 EcoWB has been contributing its technical expertise to a multi-phase restoration initiative led by Asociación Mangle and the Mangrove Action Project in El Salvador’s Jiquilisco Bay, one of Central America’s largest and most diverse mangrove ecosystems. Together, these organizations and our technical collaborators aim to conserve, restore, and sustainably manage this globally significant ecosystem that supports biodiversity and local livelihoods. Its mangroves are globally important in sequestering carbon to mitigate the effects of climate change. Jiquilisco Bay, located on the Pacific coast of southeastern El Salvador, is a place of exceptional natural richness and ecological importance. Recognized as both a UNESCO Biosphere Reserve and a Ramsar Wetland of International Importance, it is home to one of Central America’s largest and most diverse mangrove forests, covering more than 20,000 hectares. These mangroves form the heart of the Jiquilisco Bay Biosphere Reserve, which spans around 400 km². It includes a mosaic of bays, channels, sandy beaches, islands, freshwater lagoons, and coastal forests. The reserve stretches along 50 kilometers of coastline between the Lempa River and the Jucuarán mountain range. The mangroves of Jiquilisco Bay—dominated by red, black, white, and buttonwood mangrove species—play a vital role in keeping the coast alive and protected. They reduce erosion, lessen storm impacts, and filter pollutants, acting as natural shields for coastal communities. Beneath their tangled roots, they are habitat for an astonishing variety of life, including fish, crabs, and sea turtles, such as the hawksbill, green, olive ridley, and leatherback, which are at risk of extinction. Above the water line they are vital for birds and other terrestrial animals. Beyond their ecological value, these mangroves are deeply connected to local communities, supporting fisheries, providing food and materials, and sustaining livelihoods. The project’s first phase focused on understanding trends in mangrove distribution and some of the factors influencing their health. Using Landsat satellite data and advanced machine learning techniques, EcoWB helped develop high-resolution maps of mangrove cover spanning three decades. This analysis identified key influences on mangrove viability, such as proximity to agriculture, urban expansion, elevation, soil conditions, and temperature. Building on that foundation, EcoWB supported a detailed assessment of mangrove cover changes and corresponding health and analysis of canopy height and aboveground biomass during a ten-year period (2016–2025) using Sentinel satellite and LiDAR data. The height and biomass (plant material) can be related to health, age, species composition, and site characteristics. The study underscored the need for continued protection, hydrological restoration, and community stewardship to strengthen ecosystem resilience. EcoWB is now helping translate that information into action through the creation of an open-source, interactive web platform. This tool will enable Asociación Mangle, the Mangrove Action Project, NGOs, government agencies, and local communities to visualize mangrove health trends and help identify priority conservation and restoration areas. Through knowledge transfer, EcoWB and its partners aim to empower local communities to make informed, science-based decisions for the long-term management of Jiquilisco Bay. This initiative demonstrates how collaboration, innovation, and community leadership can come together to safeguard one of Central America’s most vital coastal ecosystems. By combining cutting-edge science with local knowledge, EcoWB and its partners are helping ensure that Jiquilisco Bay’s mangroves—and the communities that depend on them—continue to thrive for generations to come. 

Supporting Those in Need During Uncertain Times

By Becky Muston • June 4, 2025
As a volunteer-supported ecological assistance organization, EcoWB contributes to the vital work of the international aid community—supporting humanitarian and conservation efforts where ecological expertise can make a meaningful difference. In recent months, critical funding and staffing for international aid once provided through U.S. government programs have been withdrawn. The effects are already visible: environmental and humanitarian programs paused, local teams let go, and progress at risk of stalling. Among the efforts most affected are those tackling biodiversity loss, habitat degradation, water pollution, and climate change—areas where EcoWB has long provided professional expertise and hands-on project support. In response, we’re actively looking for opportunities to support projects that need ecological guidance or technical capacity to keep going. With our global network of skilled volunteers, we’re well placed to step in where others no longer can. If you know of places, partners, or organizations where environmental needs are going unmet—or if you're looking to make a meaningful impact— we’d love to hear from you . We also encourage those with the means to do so to take a moment: research the organizations struggling on the frontlines, see where funding may have been cut, and consider offering your support. Now more than ever, action matters—whether it’s donating, volunteering, or simply amplifying the work that still needs doing.