Posts by mlynch
Excessive Approach Velocity in Parshall Flume Flow Measurement Applications
Since the 1930s, wastewater professionals have relied on the Parshall flume as the primary device for open channel flow measurement applications. Parshall flumes provide a very repeatable relationship between water level (Ha) and flow rate; but, only so long as the approaching flow conditions are appropriate. For any flume design, the hydraulics must cause a…
Read MoreA Comparison of the Dye Dilution Method to Continuous Wave Area Velocity and Clamp-On Ultrasonic Flow Meter Technology
We were recently called upon to perform flow validation in a wastewater treatment system at a power plant in Alabama. They were performing a dye dilution flow study and were looking for alternative methods to validate the flows derived from their dye study. In the Dye Dilution method the flow rate is measured by determining…
Read MoreMeasuring River Discharge – The Great Mississippi River Flood of 2011
Measuring River Discharge is a common project as the Gulf South representative of Teledyne RD Instruments. We are often called in to support important measurements. During the record flood event in spring 2011, we demonstrated the capability of the RDI RiverRay ADCP for the USACE ERDC. Their local support consultant Dimco, needed a capable Acoustic…
Read MoreFlow Validation of London Avenue Pumping Station for the USACE New Orleans Levee System
On July 26, 2007 C.C. Lynch & Associates Inc., participated in a flow validation study in conjunction with the USACE Engineering Research Development Center (ERDC) for the purposes of determining the pumping capacity of the New Orleans Levee London Avenue Pumping Station pictured below.
Read More