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Walkers Reserve:
Freshwater Systems & Hydrology
Hydrology
Freshwater systems
Wetlands
water storage
Filtration
Walkers Reserve’s freshwater systems were developed in response to the site’s degraded hydrogeological conditions
Decades of quarrying had disrupted natural water movement and biodiversity in Walkers Reserve. Based on subsurface assessments, a 25 acre two-lake system (South Lake and North Lake) was developed as the site’s primary freshwater infrastructure. At building-scale, this work extends to onsite greywater treatment in an engineered wetland at the Walkers Reserve Education Centre.
Connected wetlands, littoral zones, retention ponds, and overflow channels now capture and store rainwater, helping to regulate flow, improve water quality, and support coastal ecosystem recovery.
Challenge
Highly variable subsurface conditions, including clay barriers, exposed substrates, dynamic sandy slopes, and uncontrolled runoff across steep terrain, limited water retention, increased erosion, and reduced water quality and habitat stability
Solution
A freshwater strategy combined hydrogeological mapping, the creation of a two-basin lake system, integrated wetlands, retention ponds, controlled overflow channels, and contour earthworks to capture, store, and manage water movement
Outcome
These systems increased water storage capacity, improved water quality, reduced erosion and sediment transport, and established stable freshwater and wetland habitats, supporting biodiversity recovery and landscape regeneration
Challenge
Highly variable subsurface conditions, including clay barriers, exposed substrates, dynamic sandy slopes, and uncontrolled runoff across steep terrain, limited water retention, increased erosion, and reduced water quality and habitat stability
Solution
A freshwater strategy combined hydrogeological mapping, the creation of a two-basin lake system, integrated wetlands, retention ponds, controlled overflow channels, and contour earthworks to capture, store, and manage water movement
Outcome
These systems increased water storage capacity, improved water quality, reduced erosion and sediment transport, and established stable freshwater and wetland habitats, supporting biodiversity recovery and landscape regeneration
Challenge
Low tree cover and degraded landscapes across Barbados reduce habitat quality, limit biodiversity, expand heat effects, and weaken landscape ecology benefits.
Solution
A nationwide tree planting initiative to plant one tree per citizen of Barbados, 285,000 trees, through native species restoration, local nursery operations, and community-led planting.
Outcome
Thousands of trees planted, increased public participation, restored habitats, and contributions to national climate and biodiversity goals.
Site Water Dynamics
Walkers Reserve sits within a coastal sandstone system shaped by layered sand, clay, and rock formations. These conditions influence groundwater movement, drainage patterns, and surface water retention.
The two-basin 25 acre freshwater lake system reflects these dynamics and operates within a ridge-to-reef landscape, connecting upland water capture to downstream wetlands and coastal environments that support native and migratory bird species and on-site agroecosystems.
groundwater
water movement
migratory birds
Site Water Dynamics
Walkers Reserve sits within a coastal sandstone system shaped by layered sand, clay, and rock formations. These conditions influence groundwater movement, drainage patterns, and surface water retention.
The two-basin 25 acre freshwater lake system reflects these dynamics and operates within a ridge-to-reef landscape, connecting upland water capture to downstream wetlands and coastal environments that support native and migratory bird species and on-site agroecosystems.
groundwater
water movement
migratory birds
Water Management
Early site assessments using Multi-Electrode Electrical Resistivity (MER), Dipole-Dipole profiling, and EarthImager2D modeling identified a two-basin lake system shaped by subsurface water movement, clay barriers, and natural overflow patterns.
The lake system is integrated with site-wide earthworks, including terracing, swales, and contour features, to capture and slow runoff, reduce erosion, and manage sediment transport, limiting negative impacts on downstream coral reefs. Constructed wetlands and shallow aquatic zones use native and naturalised species to filter sediments, regulate nutrients, and maintain water quality, ensuring a healthy freshwater habitat for native and migratory birds traveling the Atlantic flyway.
Water Management
Early site assessments using Multi-Electrode Electrical Resistivity (MER), Dipole-Dipole profiling, and EarthImager2D modeling identified a two-basin lake system shaped by subsurface water movement, clay barriers, and natural overflow patterns.
The lake system is integrated with site-wide earthworks, including terracing, swales, and contour features, to capture and slow runoff, reduce erosion, and manage sediment transport, limiting negative impacts on downstream coral reefs. Constructed wetlands and shallow aquatic zones use native and naturalised species to filter sediments, regulate nutrients, and maintain water quality, ensuring a healthy freshwater habitat for native and migratory birds traveling the Atlantic flyway.
Habitat Impact
Freshwater storage capacity has increased alongside improved water quality and reduced erosion across the broader Walkers Reserve landscape. These freshwater lake systems act as holding ponds, supporting nutrient cycling and freshwater habitat stability, slowing overland water flow, and reducing erosion during high rainfall events.
The landscape now supports aquatic biodiversity, including invertebrates, fish, and bird species, demonstrating how restored freshwater systems support wider habitat regeneration across the ridge-to-reef system.
wetlands
migratory birds
Habitat Impact
Freshwater storage capacity has increased alongside improved water quality and reduced erosion across the broader Walkers Reserve landscape. These freshwater lake systems act as holding ponds, supporting nutrient cycling and freshwater habitat stability, slowing overland water flow, and reducing erosion during high rainfall events.
The landscape now supports aquatic biodiversity, including invertebrates, fish, and bird species, demonstrating how restored freshwater systems support wider habitat regeneration across the ridge-to-reef system.
wetlands
migratory birds
Migratory Bird Monitoring
Walkers Reserve hosts robust bird biodiversity, with citizen science observation documenting 110 native and migratory bird species from the Atlantic flyway regularly inhabiting the recovering dunes and large freshwater lake systems across the property. Our comprehensive bird monitoring program, developed in partnership with BirdsCaribbean, combines regular bird counts with an on-site Motus Wildlife Tracking System station and a BirdPi acoustic detection system for continuous, non-invasive species monitoring.
Through a BirdsCaribbean workshop on community-based ecotourism, local guides, educators, and conservation officers are trained to lead bird-watching tours across habitats, turning bird conservation into a source of community income.
Migratory Bird Monitoring
Walkers Reserve hosts robust bird biodiversity, with citizen science observation documenting 110 native and migratory bird species from the Atlantic flyway regularly inhabiting the recovering dunes and large freshwater lake systems across the property. Our comprehensive bird monitoring program, developed in partnership with BirdsCaribbean, combines regular bird counts with an on-site Motus Wildlife Tracking System station and a BirdPi acoustic detection system for continuous, non-invasive species monitoring.
Through a BirdsCaribbean workshop on community-based ecotourism, local guides, educators, and conservation officers are trained to lead bird-watching tours across habitats, turning bird conservation into a source of community income.
Migratory Bird Monitoring
Walkers Reserve hosts robust bird biodiversity, with citizen science observation documenting 110 native and migratory bird species from the Atlantic flyway regularly inhabiting the recovering dunes and large freshwater lake systems across the property. Our comprehensive bird monitoring program, developed in partnership with BirdsCaribbean, combines regular bird counts with an on-site Motus Wildlife Tracking System station and a BirdPi acoustic detection system for continuous, non-invasive species monitoring.
Through a BirdsCaribbean workshop on community-based ecotourism, local guides, educators, and conservation officers are trained to lead bird-watching tours across habitats, turning bird conservation into a source of community income.
Greywater & Water Reuse
In collaboration with the University of the West Indies' Centre for Resource Management and Environmental Studies (CERMES), WIRRED designed and installed a reed bed baffle system for greywater treatment at the Walkers Reserve Education Centre. The system uses phyto- and bioremediation, drawing on native wetland plants and biological processes, to treat and recycle greywater onsite. Performance is tracked through field instruments and wet chemistry analysis across a range of water quality parameters.
The project contributes directly to Barbados' water resilience challenges. As one of the world's most water-scarce countries, the island depends almost entirely on groundwater, making greywater recycling an important part of broader water reclamation efforts.
Greywater & Water Reuse
In collaboration with the University of the West Indies' Centre for Resource Management and Environmental Studies (CERMES), WIRRED designed and installed a reed bed baffle system for greywater treatment at the Walkers Reserve Education Centre. The system uses phyto- and bioremediation, drawing on native wetland plants and biological processes, to treat and recycle greywater onsite. Performance is tracked through field instruments and wet chemistry analysis across a range of water quality parameters.
The project contributes directly to Barbados' water resilience challenges. As one of the world's most water-scarce countries, the island depends almost entirely on groundwater, making greywater recycling an important part of broader water reclamation efforts.
Greywater & Water Reuse
In collaboration with the University of the West Indies' Centre for Resource Management and Environmental Studies (CERMES), WIRRED designed and installed a reed bed baffle system for greywater treatment at the Walkers Reserve Education Centre. The system uses phyto- and bioremediation, drawing on native wetland plants and biological processes, to treat and recycle greywater onsite. Performance is tracked through field instruments and wet chemistry analysis across a range of water quality parameters.
The project contributes directly to Barbados' water resilience challenges. As one of the world's most water-scarce countries, the island depends almost entirely on groundwater, making greywater recycling an important part of broader water reclamation efforts.
Walkers Reserve Regeneration Projects
Walkers Reserve Regeneration Projects
Walkers Reserve Regeneration Projects
Experience Regeneration at Walkers Reserve
Walkers Reserve shows what is possible when a damaged landscape is given the conditions to regenerate. Explore how coastal and inland ecosystems are being rebuilt across the site, and contact WIRRED to start your regeneration project.
Experience Regeneration at Walkers Reserve
Walkers Reserve shows what is possible when a damaged landscape is given the conditions to regenerate. Explore how coastal and inland ecosystems are being rebuilt across the site, and contact WIRRED to start your regeneration project.
Experience Regeneration at Walkers Reserve
Walkers Reserve shows what is possible when a damaged landscape is given the conditions to regenerate. Explore how coastal and inland ecosystems are being rebuilt across the site, and contact WIRRED to start your regeneration project.
Walkers Institute for Regenerative Research Education and Design Inc.
PROJECTS
WIRRED is a registered non-profit organization under the Companies Act, Cap.308: Company No. 42861.
Nonprofit status: Registered under Charities Act, Cap 243: Registered Charities No. 1405
WIRRED is a registered non-profit organization under the Companies Act, Cap.308: Company No. 42861.
Nonprofit status: Registered under Charities Act, Cap 243: Registered Charities No. 1405
PROJECTS
WIRRED is a registered non-profit organization under the Companies Act, Cap.308: Company No. 42861.
Nonprofit status: Registered under Charities Act, Cap 243: Registered Charities No. 1405