Case Studies

App Note: ADV Sediment Flow Research by Lousiana State

Subsiding and choked off from the Mississippi River, southeastern Louisiana’s coastal marshlands have steadily sunk and become more saline. According to U.S. Geological Survey (USGS) data from 1990 to 2000, Louisiana is losing 24 square miles (62 square kilometers) of wetlands per year – wetlands that are nurseries of coastal fisheries and, as Hurricanes Katrina and Rita illustrated in 2004, can help absorb the brunt of storms blowing in from the Gulf of Mexico. Recognizing the danger of continued wetland degradation and loss, state and federal officials are seeking ways to rebuild Louisiana’s threatened wetlands.

App Note: Various FlowTracker Customer Stories

Keith Ging, senior hydrologist in the Hydromet Operations group of the Lower Colorado River Authority (LCRA), has a Texas-sized challenge. “Our main purpose is to determine how much water is flowing into streams and canals, how much water is fl owing into our lakes and out of our lakes, and to make sure that data gets to the people who can use it in their decision-making,” says Ging in LCRA’s headquarters in Austin, Texas.

APP NOTE: Monitoring Wastewater Flow in Hawaii

Mixing and dilution of effluents discharged into the ocean is an important aspect of health of ocean users and the ecology of the denizens. In an effort to monitor the path of wastewater making its way in to the Pacific water off of Oahu, the EMM2000 Buoy has been selected as a measuring tool for the discharge of pipe effluent (sewage water) 800ft off shore to ensure that the wastewater discharge was in fact moving away from shore to avoid affecting local beaches.

App Note: Customer Stories #1

The Los Angeles County Sanitation Districts (LACSD) began a study of water currents and vertical temperature stratification over the Palos Verdes shelf in October 2000. The purpose of the study was to gain long-term information on the normal patterns, seasonal variability, and short duration variability in currents and temperature in the vicinity of the LACSD's ocean outfalls.

App Note: Customer Stories #2

Adventurous personnel from Idaho Power Company and SonTek/YSI braved class IV rapids to make RiverCat discharge measurements using a kayak on the Snake River at Johnson Bar gauging station. This station is about 18 miles downstream of Idaho Power Company’s Hell’s Canyon Hydroelectric Dam.

App Note: Acoustic Doppler Current Meters Guide Intelligent Decisions on Malaysia’s SMART Project

The awe-inspiring scope of Malaysia’s Stormwater Management and Road Tunnel (SMART) Project – 12 kilometers of tunnels 11.8 meters in diameter, capturing up to 4 million cubic meters of floodwater – staggers the imagination. The concept of a tunnel that detours traffic under crowded Kuala Lumpur streets during dry weather and shunts stormwater safely beneath downtown during flood events is
as exciting as it is creative.

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: SonTek (Argonaut) SL Customer Application Stories

Irrigation canals can often experience significant variations in flow with little or no change in water level. In these cases, the traditional relationship that ties stage to discharge (generally known as a Stage-Discharge relationship) is significantly less effective in the estimation of flow, and a more accurate approach needs to be taken.

App Note: Monitoring Coral Reefs in the Carribean

The Caribbean Community Climate Change Centre (CCCCC) awarded YSI Integrated Systems and Services (a division of Xylem Inc.) a contract for five marine monitoring buoys that will collect high-quality data for researchers studying climate change in the Caribbean Sea, including the waters of Barbados, Belize, The Dominican Republic and Trinidad & Tobago.

App Note: Considerations for Sea Cage Aquaculture

The consumer popularity of marine finfish in recent years has led to an increase in the demand for the culture of traditional species and also experimentation with several newer species. This popularity has led to an increased demand for marine aquaculture sites in several areas.
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