Planning with Water in Mind: A Science-Based Tool for Protecting the Congo Basin

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Water is more than just a resource — it is a fundamental force that shapes ecosystems and sustains life, connecting landscapes from ridge to reef. In the Congo Basin, water plays a central role in maintaining the health and function of the region’s extensive peatlands. The peatlands in this region are critical  for local livelihoods as well as global climate regulation and biodiversity conservation. They hold enough carbon which, if released, would amount to between 2-3 years of current total global CO₂ emissions. while serving as home to millions of people. Many local communities depend on peatland resources for their livelihoods, including fishing and crocodile farming, accessing clean water, and collecting forest products such as fuelwood, medicine, and timber.  

Peatlands operate within a complex and dynamic hydrological cycle, and they must stay wet to stay intactOnce the water table drops, the peat begins to break down, turning a carbon sink into a carbon source.  When dried out or degraded, they become highly vulnerable to fires, which are especially concerning due to the significant greenhouse gas emissions they can emit. 

 

 

 

 

 

 

© UNEP-DHI

Understanding this system is no small task. Water constantly moves — falling as rainfall, absorbed and evapotranspired from vegetation and soil, infiltrating deep into peat layers, moving underground through saturated and unsaturated zones, and flowing across the surface as runoff. Disruptions to this balance — through unsustainable land-use practices or climate change — can trigger cascading environmental and social impacts.

Anticipating these disruptions requires more than observation — it demands tools that can simulate future scenarios. This is the foundation of the Peatland Hydrological Decision Support System (HDSS) — a science-based-tool designed to simulate the water dynamics of the Lac Télé–Lac Tumba landscape and support the sustainable development of the peatlands. 

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