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The Panama Canal Watershed is perhaps one of the tropics' clearest examples of ecosystem services in action. The basin’s fresh water transports four percent of seafaring world trade, generates $2.5 billion in annual revenue and sustains one of the fastest growing economies in the world today. Named for the Agua Salud River, the 700-hectare Panama Canal Watershed Project seeks to explain how different landscapes common in the rural tropics — from intact forests to cattle ranches — impact ecosystem services in an era of exploding population growth, ecosystem degradation, and global climate change.


Agua Salud’s experimental plots include native tree plantations, silvopastoral and shade coffee systems, invasive grasslands, subsistence farms and forest regrowth ranging from a few years to many decades in age. Figuring out the hydrology of the basin — essentially accounting for every last drop of water that passes through it — is a primary goal of the project. Reforestation with native species, carbon sequestration, biodiversity restoration and disease ecology are also part of one of STRI’s fastest-growing research platforms. The research aims to inform policymaking decisions that have implications for billions of people throughout the tropics. The project’s large-scale reforestation and mixed-use experiments attract researchers interested in facets of landscape regeneration ranging from economics to the restoration of biodiversity. 


Agua Salud staff helps to orient new visiting scientists.

Jefferson Hall

Jefferson Hall

Staff Scientist and Project Director

Adriana Tapia

Adriana Tapia

Project Manager

Taisha Parris VSO

Taisha Parris

Visitor Services Office

Services and Resources

A steady influx of new scientific visitors and research projects make Agua Salud one of STRI’s fastest-growing research sites. Resources are still limited but there is housing near the research site some transportation available. Visiting researchers are usually based out of STRI’s Tupper Center headquarters, where Agua Salud’s administrative staff and laboratories are based. Making the 50km commute between Tupper and Agua Salud is one option for visiting researchers.

Experimental catchments

Experimental Catchments

Agua Salud’s experimental catchments are the foundation of the project’s research program. These include catchments of near-mature forest, managed forest, and secondary succession forests of various ages. There are also native timber plantations that are mixed-species or monoculture, and a teak plantation. Farmed landscape includes silvopastoral and shade coffee systems, and mixed-use subsistence lands including business-as-usual cattle ranching. Invasive canal grass also covers a catchment area.

Hydrological data

Hydrological Data

Agua Salud’s sophisticated system of hydrological data collection builds on more than a century of monitoring in the Panama Canal Watershed. Along with a standardized system of gauged weirs to measure stream flow, the hydrology research measures water flow through soil at different depths, runoff, and water use by trees — sap flow and transpiration. The objective is to create physics-based models that can be applied to current and future conditions across a variety of landscape uses.

Meteorological data

Physical Monitoring Program

Currently managed by the Physical Monitoring Program, the Agua Salud’s primary meteorological station is located at a location known as Celestino. Since 2015, the Celestino station has been monitoring rainfall, solar radiation (PAR, Global and net), Temperature, Relative Humidity, Wind speed and direction, as well as a calculated value for Evapotranspiration, from a 12m tall tower located at the top of a highest hills in the area.



The project rents two houses in the nearby town of El Giral. Both sleep up to six people in shared rooms. They have shared bathrooms, kitchens and a furnished common area. Internet service is spotty. Food can be purchased in town but it is probably best to stock up at a supermarket in Panama City before settling in.

Maps and Directions

The project lies roughly 50 km northwest of Panama City in Colón Province and can be reached by either via Transisthmian Highway or the toll road to Colón. To access the site, turn west at the town of El Giral, just north of the Chagres River.

Reaching the field sites usually requires a 4x4 vehicle. Road conditions during the dry season are typically okay but rainy season access can be limited. Transportation should be arranged by visitors and visits coordinated with the project manager.



Contact us

Visiting Scientists

For principal investigators interested in conducting research at Agua Salud:

Jefferson Hall

Staff Scientist and Project Director
+507 212.8229

Adriana Tapia

Site Manager
+507 212.8295

For issues related to registering for research and using STRI facilities:

Taisha Parris

Visitor Services Office
+507 212.8098


Report all emergencies to STRI security

+507 212.8911
+507 212.8211
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