The FHI was originally tested and refined in two key basins in Asia: the Dongjiang River in China’s Pearl River basin and the Lower Mekong in Laos, Thailand, Cambodia and Vietnam. A set of globally-representative basins are in the process of being assessed, taking into consideration different levels of data availability, development trajectories and climatic contexts. Reports will be shared here as they are finalized.



Dongjiang River Basin



The Dongjiang River is one of the main tributaries of the Pearl River system in southern China. It is the primary water source for more than 40 million people, including the city of Hong Kong, which is located outside of the basin but receives about 80% of its municipal water supply from the Dongjiang. Since in the late 1950s, demands on the have Dongjiang increased as dams were constructed for flood control and hydropower. At present, water allocation among the cities and water quality are some of the region’s top concerns. Applying the Freshwater Health Index to the Dongjiang provides an opportunity to, for the first time, comprehensively assess the state of the basin at a time when stakeholders are starting to think about its future trajectory.

Dongjiang Basin Technical Report 
(English PDF) (Chinese PDF)

Dongjiang Basin Executive Summary 
(English PDF) (Español PDF) (Português PDF) (Chinese PDF)



Sekong, Sesan and Srepok (3S) Basin in the Lower Mekong



Supporting a population of about 3.4 million people, the Sekong, Sesan and Srepok (3S) Rivers form an important sub-catchment of the Lower Mekong and represent a microcosm of the challenges faced by the entire Mekong River basin. Covering just 10% of the Mekong Basin, the 3S rivers provide almost a quarter of the Mekong’s total discharge and nearly 15% of the river’s suspended sediment — which, in turn, provides nutrients to the Tonle Sap Lake and inland fishery as well as the Mekong Delta, Vietnam’s rice bowl. More than 65 dams, most used to generate electricity, are currently operational in the 3S system, impacting seasonal flows, sediment transport and fish migration. Expansion of the agriculture sector in the 3S has the potential to increase water demand for irrigation, particularly in the dry season, placing additional pressure on water resources. The Freshwater Health Index will describe the status of the Lower Mekong to help inform better decisions as a wide range of development initiatives potentially will be competing for water resources.

3S Basin Technical Report 
(English PDF)

3S Basin Executive Summary 
(English PDF)



Bogotá Conservation Corridor, Bogotá, Colombia




Located outside of Bogotá, Colombia. the Chingaza-Sumapaz-Guerrero-Guacheneque Conservation Corridor covers 606,297 hectares and includes 22 municipalities. The area is made up of urban and industrial areas (6.2%), agricultural areas (45.3%) and natural and semi-natural forests and páramos (48.5%). It includes the national parks of Chingaza and Sumapaz and is considered the largest example of intact wasteland in the world. The greatest threats to the landscape and biodiversity include desertification, floods and forest fires, all exacerbated by climate change. Additional threats include illegal mining, livestock grazing, urban growth and monoculture agriculture. The Freshwater Health Index is being applied to determine a baseline assessment of the health of this basin against which future scenarios can be modeled.

Technical report coming soon.



Guandú Basin, Brazil



The Guandú River basin is of fundamental importance for the metropolitan region of Rio de Janeiro. With a drainage area of 1,921 km2, the basin covers 12 municipalities, supplies water to more than 10 million people and various productive sectors, and supports the operation of hydroelectric and thermoelectric plants that generate employment and income for thousands of citizens. Much of the basin has been degraded, even as demands on water use have increased. The application of the Freshwater Health Index will offer baseline health assessment against which land-use change and other future scenarios can be modeled.

Technical report coming soon.



Alto Mayo Basin, Peru




The Alto Mayo Basin covers approximately 780,718 hectares and is shared by three provinces (Rioja, Moyobama and Rodríguez Mendoza) and two regions (San Martín and Amazonas), and contains the Alto Mayo protected forest, an area rich in biodiversity and ecosystems that provide important benefits to people. The basin is home to 266,896 people, including 14 indigenous communities, which represent 19.8% of the territory and approximately 2% of the overall population. Although small in number, indigenous groups continue to rely heavily on their natural environment for subsistence needs. It is necessary to incorporate indigenous populations in watershed management processes and to promote policies and planning tools that will allow them to satisfy their subsistence needs. As part of the Freshwater Health Index assessment process, stakeholders will join together to discuss priorities within the basin that will determine future scenario modeling.

Technical report coming soon.