Case Studies

App Note: SonTek (Argonaut) SL Automated Gaging of the Narmada Main Canal-India

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 scale of the SSNNL canal system, velocity changes due to volume and management, and the constant battle against siltation illustrate the importance for accurate measurement of flow and discharge.

App Note: HydroSurveyor Enables Rapid Reservoir Surveys

As the regulatory requirement to assess United Kingdom reservoirs and lakes expands to include smaller bodies of water, SonTek’s HydroSurveyor system has been configured into a remote control boat so that hydrometric data can be obtained quickly, simply, safely and accurately.

App Note: SonTek-IQ Shallow Flow Meter Revolutionizes Flow Measurement in the Australian Bush

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. Amid the tangle is Colombo Creek, a modest stream with a slope of just 31 meters in 60 kilometers (about 3 feet per mile). With such a flat profile, the backwater effect of confluences, fallen trees, slumped banks and even algal blooms can dramatically impact flow and affect accuracy of rating curves.

Case Study: Closing the Gates - Monitoring and Ingenuity Help Lousiana Communities Battle Storms

Flood Control Gate System The federal government saw the need for a flood control system through Terrebonne (Louisiana) and neighboring parishes, and in 1992, began a study to map out a project. Congressional acts in 2007 and 2014 resulted in authorizations for a $10.8 billion plan—dubbed the Morganza to the Gulf Hurricane Protection System after the town that marks its projected starting point— but the government never funded the projects. Closely monitoring stage and flow in real-time with instruments such as the SonTek-SL has allowed the levee district team to see the dramatic effects of landscape, wind, and tide on surges across the parish.

HydroSurveyor Enables Rapid Indian Railways Bridge Surveys

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. The HydroSurveyor is a multi-frequency acoustic Doppler current profiling system (ADCP) equipped with nine acoustic beams, five of which are used to survey at any one time; four slanted beams provide a velocity profile from up to 128 cells as well as measure depth, and then there is a vertical beam with an 80m range which measures the depth directly below the system.

App Note: CTD Montitoring Technology Helps Reveal Arctic Secrets

A group of Arctic researchers has employed the latest monitoring technology to investigate the effects of climate change, by measuring temperature and salinity in the water column beneath surface ice. The results of the investigation, which utilised SonTek’s new CastAway-CTD™ instrument, could cast new light on our understanding of the ways in which shifting ocean currents impact the climate in northern Europe.

Exploring Eelgrass - Shallow Water Beds Capture CO2

Climate Change and Eelgrass Study Carbon dioxide levels in the atmosphere have increased by about one-third since the start of the Industrial Revolution, from about 300 parts per million (ppm) to about 400 ppm. About one-third of the atmosphere's carbon dioxide dissolves into the ocean. As dissolved carbon dioxide levels have increased, the earth's seawater has become about 30 percent more acidic. "Like many green plants, eelgrass grows faster as carbon dioxide levels increase," notes California Sea Grant Extension ecologist Joe Tyburczy at Humboldt State University in Eureka, California. "But unlike green plants that grow on land, eelgrass takes up CO2 directly from the seawater."

Case Study: Watching Waves - Busy Singapore Port Adds Sensor Technology to Ensure Safe Berthing

With the large volume of cargo vessels relying on the country’s ports, the Maritime and Port Authority of Singapore (MPA) has the challenging task of managing the safe and efficient operation of surrounding waterways. While the average consumer may not spend much time considering how goods arrive at their doorstep, behind the scenes agencies like the MPA are intimately involved with the logistics.

App Note: Palm-sized CastAway-CTD Reveals Complex Dynamics in a Small Harbor

The Mexican Institute for Water Technology (IMTA) had big questions to answer as it studied plans for the expansion of the Port of Manzanillo, an important container shipping center on Mexico’s Pacific coast. The port authority received permission to upgrade the harbor on the condition that it restore an adjacent lagoon, cut off from the rest of the harbor by a road embankment decades ago.
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