Rainbow Sensing

?? Remember our post from last week? Rainbow Sensing is working hard on an exciting innovation: #measuring #waterlevels optically using #crosssections. ???? With our latest 3D plotting feature (see video ??), we deliver more insights and enhance sanity checks for users. ????? Here's what you can explore in the interactive view: ? Camera pose ? Selected area of interest ? Cross section ? Water surface at a user-provided level This powerful tool will soon be released in #pyOpenRiverCam v0.8.0! ?? Stay tuned for updates! ?? #Innovation ?? #WaterLevelDetection ?? #EnvironmentalTech ?? #OpenSource ?? photrack AG OpenDroneMap TEMBO Africa World Meteorological Organization OpenMap Development Tanzania (OMDTZ) TU Delft | Global Initiative IHE Delft Institute for Water Education Alex Liberzon Nick van de Giesen Nick Everard Edward Anderson Edward Melger

? Exciting feature in the making for OpenRiverCam! ???? The fascinating thing about image-based environmental observations: once you have the geometrical information (a river cross-section) and understand the perspective, the possibilities become endless! ?? We are working on the first OpenRiverCam optical water level estimation method! If no water level instrument may work, then #go #optical! How does it work? ? By analyzing intensity properties on both sides of an assumed water edge, ? Detecting where the largest differences in properties occur, ? Using that to identify the water edge with precision. Check out the teaser below ??? to see how this cutting-edge method performs its magic. The two rectangles are collecting intensities left and right of the tested possible waterline location. The lower the score, the more likely we have found the edge. Stay tuned for updates as we refine this feature for upcoming #pyOpenRiverCam v0.8.0. #Innovation ?? #WaterLevelDetection ?? #EnvironmentalTech ?? #OpenSource ?? photrack AG OpenDroneMap TEMBO Africa World Meteorological Organization OpenMap Development Tanzania (OMDTZ) TU Delft | Global Initiative IHE Delft Institute for Water Education Alex Liberzon Nick van de Giesen Nick Everard Edward Anderson

Please don't miss the World Meteorological Organization #webinar on #low #cost #bathymetry with off-the-shelf materials. Today at 3PM CET we will show how this works and discuss what is needed for broad uptake.

?? Exciting News for Free and #Opensource #River #Monitoring enthusiasts! ?? Large-scale Particle Image Velocimetry (PIV) has just become faster and handling larger datasets than ever with the latest release of #PyOpenRiverCam! ?? Curious about the cutting-edge features that make this possible? ?? Dive into the details by checking out this new blog post. ?? Let's make river monitoring smarter, faster, and more innovative together! ???? GroundTruth Deltares World Meteorological Organization Alex Liberzon Alexandre Hauet photrack AG U.S. Geological Survey (USGS) Equinox Construction Services The World Bank Group Edward Anderson OpenDroneMap SADC_WaterNet IHE Delft Institute for Water Education Delft University of Technology TAHMO World TEMBO Africa Mark Randall Nick Everard

Understanding river discharge is essential to estimating landscape responses to rainfall and other climatic driving forces, planning infrastructure, predicting floods and droughts, and assessing ecosystem conditions. Discharge measurements in Africa are scarce. Yet, there are several highly affordable and locally viable innovative techniques to measure discharge. On Friday 1 November, as part of the annual SADC_WaterNet symposium, Micha Werner, Mark Graham, Leisa Mokuoane, Dr. Hubert Samboko, Nicholas B. Pattinson, PhD, Camila Justine Jacinta Haux and Hessel Winsemius organized a fieldwork experience to demonstrate these methods. This was a collaborative effort between Rainbow Sensing, GroundTruth, OpenDroneMap, University of Zambia, Lesotho Department of Water Affairs, UNICEF and IHE Delft Institute for Water Education. The event was supported by the EU HORIZON project TEMBO Africa, UNICEF, and GroundTruth in partnership with the International Water Management Institute (IWMI) within the CGIAR Initiative on Digital Innovation. Nicholas and Mark demonstrated the #Velocity #Plank, a transparent measurement rod. The Plank only costs about 55 USD and allows citizen scientists to measure river cross-section depths and in-stream velocities, ultimately allowing citizen scientists to estimate river discharge. Micha showed the sudden gulp salt dilution gauging method. By injection of a known amount of dissolved ordinary kitchen salt in the stream, and through measuring the change in concentration with an Electrical Conductivity (EC)-meter, river discharge can be calculated. Hubert showed very accurate bathymetry measurements with a fishfinder, very low-cost Global Navigation Satellite System (GNSS) devices and a simple PVC-built floater. Leisa, representing the WaterNet 2024 host nation Lesotho,demonstrated both a propeller and electromagnetic approach to measure water velocities. Finally, Hessel demonstrated how smartphone videos can be turned into accurate surface velocity and discharge estimates through the open-source software platform #LiveOpenRiverCam, providing a method to measure discharge very frequently and at many sites. During the demonstration to over 40 participants from the WaterNet symposium, all methods gave similar discharge results. This demonstrates that there are viable, accurate, and precise measurement methods that are also affordable, repeatable, and accessible via #citizenscience methods, using devices that can be locally acquired. The primary feedback from the demonstrations was “we had too little time to fully appreciate everything”. Next year’s WaterNet conference will be held in Chongwe - Zambia. Would you like us to do more next year and perhaps even extend the activities to a full day? We are considering a full fieldwork day with more citizen science related methods. Please like or respond below if you are keen! #RainbowSensing #WaterNet #watermonitoring #discharge #citizenscience

??Just #released: #LiveOpenRiverCam for #RealTime #river #velocimetry and #flow estimation with a #free and #opensource #API. ??Try it out now at https://lnkd.in/ebnqyndk ????Read our #release #article here. #Hydrology #RiverMonitoring #OpenSourceTools #EnvironmentalTech #SustainableSolutions #WaterManagement #Innovation #VelocityAnalysis #DataScience #TechForGood #ClimateAction World Meteorological Organization Salvador Pe?a-Haro TEMBO Africa TAHMO_World The World Bank Group Global Facility for Disaster Reduction and Recovery (GFDRR) IHE Delft Institute for Water Education Delft University of Technology TU Delft | Global Initiative Deltares

#bathymetry as a #service in #Zambia by local teams. We use #local #devices that are #affordable and easy to use to collect #bathymetry at 10% of the costs at an unprecedented accuracy. Read here about the demonstration at Ray #reservoir with The University Of Zambia (UNZA) Delft University of Technology Rainbow Sensing and OpenDroneMap. Global Facility for Disaster Reduction and Recovery (GFDRR) The World Bank Deltares Stephen Mather Olivier Hoes Dr. Hubert Samboko. Acknowledgements to World Meteorological Organization for letting us develop this under their #hydrological #research #strategy.

#pyopenrivercam 0.6.0 is out and available with #pypi (pip install --upgrade pyopenrivercam) and #conda-forge (mamba update pyopenrivercam). Not many new features yet, except for a much more stable reprojection method and as a result better #georeferenced #velocimetry...but wait....we have a #logo now part of our trademark! Please let us know what you think about it by commenting below. Thanks to Briony Morrow-Cribbs who designed it.

Build your very own super-accurate #bathymetry #measurement set up for 1,500 USD only! Works in fast and slow flowing water, #Powerpoint with #instructions are in the post. Created by Olivier Hoes Dr. Hubert Samboko. Soon we will post results over Ray Reservoir in Zambia as well where we integrate with #UAV #topography using OpenDroneMap. Acknowledgements to World Meteorological Organization for their support of OPEN PROFILE.