Hessel Winsemius
Director at Rainbow Sensing
The Hague, South Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolHessel Winsemius is a hydrology and climate-change expert with 12+ years’ experience translating satellite data and hydrological science into globally applicable flood- and water-resource assessments. He holds a PhD Cum Laude from TU Delft for pioneering use of GRACE gravity and evaporation observations in large-basin modelling and has been an associate professor focused on hydrology–society interactions and extremes in Africa. As core developer of the GLOFRIS model (the engine behind the Aqueduct Global Flood Analyzer) he blends rigorous research with operational tools used for global flood risk insights. He co-founded and now directs Rainbow Sensing, creating the open-source OpenRiverCam ecosystem to enable low-cost, locally sustainable streamflow observations. His work is distinguished by a persistent emphasis on transferable methods that fit local capacity, and by publishing high-impact papers in Nature journals that bridge global datasets and decision-relevant applications. Based in The Hague, he combines academic depth with hands-on social enterprise innovation to close the gap between remote sensing, models and on-the-ground monitoring.
11 years of coding experience
20 years of employment as a software developer
MSc, Hydrology, Civil Engineering, MSc, Hydrology, Civil Engineering at Delft University of Technology
Github Skills (122)
proton10
forge10
ntrip10
hydrology10
quantile10
object-tracking10
api10
computer-vision10
steam10
measurements10
360-degree10
steamworks10
conda10
coupling10
surface10
Programming languages (11)
Github contributions (5)
conda-forge/pyopenrivercam-feedstock
Sep 2022 - Mar 2025
A conda-smithy repository for pyopenrivercam.
Contributions:2 reviews, 25 PRs, 20 pushes in 2 years 6 months
pythoncondasmithy
localdevices/pyorc
Dec 2020 - Jan 2023
Surface velocity, object tracking, and river flow measurements in an open-source API
Contributions:27 releases, 2 reviews, 367 commits in 2 years 2 months
velocimetryapiriverhydrologymeasurements
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