The group selected the Ruki River, a large centrally-located tributary to the Congo. The Ruki represents only 5% of the total Congo Basin by area but is uniquely blanketed by homogenous pristine lowland forest land-cover.

An ambitious plan to turn back the hands of time by nearly a century on the Elwha River in northwest Washington State is being carefully studied by stakeholders on other river systems where long-standing dams may someday be breached. Dismantling two concrete hydroelectric dams built in the early 20th century requires careful planning, skilled execution, and close attention to the flow of water that will nurture the reemergence of the river’s salmon population.

But behind the massive tunnels and the huge catch basins is a system just as staggering – the SMART Project’s nerve system, a network of flood detection equipment and automated management machinery linked by a Supervisory Data Acquisition and Control (SCADA) brain that uses the information it gathers to automatically engage flood management gates and pumps.

HidroMares has installed its SISMO systems at seven port complexes around Brazil, from ocean terminals in the south to an inland river port in the Amazon basin. At the heart of each system is a SonTek acoustic Doppler current profiler (ADCP), which provides current velocity and direction data throughout the water column, as well as water level.

India is emerging as a world leader in irrigation schemes, and the 458-km Narmada Main Canal – the largest concrete-lined irrigation canal in the world – stands as a monument to the opportunities and challenges that face water providers.

The ARC-Boat was developed by HR Wallingford and employs SonTek-proprietary Acoustic Doppler Profiler (ADP®) technology. The HydroSurveyor is a highly sophisticated system which includes 5-beam depth sounding, water velocity profiling and navigation capabilities. When mounted in the ARC boat, the HydroSurveyor scans the reservoir as it is guided across the water’s surface. Recorded data is then analyzed by HydroSurveyor software to produce accurate depth measurement in addition to bathymetry maps of the entire water body. With a small amount of post-processing in GIS or 3-D CAD, an accurate water volume can be determined.

It’s hard to picture just how flat Australia’s Murray-Darling Basin is, but picture this – tens of thousands of square kilometers braided with slow-flowing rivers and streams with virtually no fall in their channels.

The HydroSurveyor-M9 system from SonTek, a Xylem brand, is an instrument/technology that Indian Railway has employed to rapidly measure bathymetry data along with velocity data.

Surveys were conducted at three mining pits in January 2018 using the Xylem UK rQPOD radio controlled vessel and the SonTek HydroSurveyor-M9 system over two days. Speed of sound in water cor- rections, an integral part of any acoustic survey, were carried out using the SonTek CastAway-CTD. HYPACK software managed the prepara- tion, survey, processing and outputs for the survey.