Presented at the USCID Conference on Benchmarking Irrigation System Performance Using Water Measurement and Water Balances, San Luis Obispo, CA, July 9, 2002.
In 1996, the United States Bureau of Reclamation (USBR), Mid-Pacific Region, Northern California Area Office began the Willows Flow Monitoring Program. The program objective was to monitor, in near real-time, 85% of the Sacramento River Diversions from Shasta Dam to Sacramento. Several site visits were conducted to the District and their diversion points along the Sacramento River by USBR and Irrigation Training and Research Center (ITRC) staff from California Polytechnic state University (Cal Poly), San Luis Obispo. One of the sites identified for flow monitoring was the Glen-Colusa Irrigation District (GCID) canal at the Stoney Creek Siphon. At question was the application and functionality of the Acoustic Doppler Flow Meters (ADFM) inside the siphon channels. Data were relayed through a Supervisory Control and Data Acquisition (SCADA) system provided by Sierra Controls of Carson City, Nevada. The maximum volume of flow in the GCID canal siphon (3200 cfs) called for three (3), 12’x14’ rectangular tubes over 200 feet in length. Each tube required an individual flow meter. Three ADFMs were installed to measure the flow of the water through the siphons. The sensors were placed far enough into the downstream end of the siphon to insure constant submergence. Final installation appeared to work best with the sensor mounted on the side of the rectangular tubes. A structure was constructed for the SCADA equipment that was used for data management and access. As a result of the program efforts, the USBR and GCID were set up with the capabilities to poll the GCID Stoney Creek Siphons site and monitor the real-time flow data at their respective office computers.
Bioresource and Agricultural Engineering