Using Low-Cost Equipment to Gather High Precision Data for Flood Modeling

In collaboration with Deltares and with funding from GIZ, OMDTZ was able to collect accurate and precise river cross-section surveys using an innovative, low-cost technique developed between the Resilience Academy and OMDTZ.

Photo: Godfrey Kassano
Project coverage area

From Research to Innovation to Service

It is important to mention that about one year ago, a survey of the cross-section of the river would require an international consultant to fly in with expensive equipment. (A professional-grade set of survey equipment with dual-frequency Global Navigation Satellite System (GNSS) units or acoustic profiling equipment costs tens of thousands of dollars.) Even with such expertise, a consultant would not know the environment, the possible risks of entering the Msimbazi, and the steps needed to be able to work in the neighboring wards.

Deploying Human and Technical Resources

The methodology used for this project has been documented and is freely available for people who would like to further understand the process and even replicate it in other locations.

Base stations
A surveyor in the field holding a locally made survey tool in RTK mode
One of the surveyed transect, visualized in 3d using DTM

Project Results and Data Use

The product of this assignment will be the development of a wider flood model that will assist in providing the evidentiary basis for investments in the basin. This project is complementary to the ongoing Tanzania Urban Resilience Program (TURP), implemented by the World Bank.

A screenshot of one of the flood hazard maps produced using the new survey data

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OpenMap Development Tanzania

OpenMap Development Tanzania

Using Open Data, Open Source, and maps to solve different socio-economic challenges.