177,000 km²
Basin Area
12
Flood Scenarios
8 agencies
Stakeholders Served
40 years
Calibration Period
The Challenge
What the Client Needed
Tanzania's Rufiji River Basin — covering 177,000 km² and supporting millions of people — had no integrated hydrological information system. Water allocation decisions were made without spatial data, flood risk was poorly understood, and competing sectoral demands (agriculture, hydropower, domestic supply, ecology) were uncoordinated.
Our Solution
How TANGIS Delivered
TANGIS developed a hydrological model of the Rufiji Basin calibrated against 40 years of stream gauge data, and built a web-based decision support portal enabling water managers, planners, and policymakers to query flood risk, groundwater potential, and scenario-based water allocation impacts.
Deliverables
Technologies Used
Project Tags
Outcomes & Impact
Results Delivered
First basin-wide integrated hydrological model for the Rufiji, serving 8 government agencies
Flood risk maps used in 2023 flood emergency response — reducing estimated impact by directing resources to highest-risk zones
Groundwater potential maps identified 40+ viable drilling sites in previously unserved communities
Water allocation model facilitated resolution of a 5-year dispute between agricultural and hydropower water users
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