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Hydraulic Model Study of Delta-Mendota Canal
The flow capacity of the Delta-Mendota Canal (DMC) from the San Francisco Bay Delta to the O'Neill Forebay is restricted due to the original telescoping design flow requirements, freeboard, and changes in water delivery patterns, and possible ground subsidence over the past 50 years. The Bureau of Reclamation is considering various alternatives including the construction of an Intertie between the DMC and the California Aqueduct. To determine the feasibility of these alternatives, the capacity of the existing conveyance system and the areas where conveyance restrictions occur need to be determined. A one-dimensional hydraulic model, HEC-RAS, was development and calibrated to the upper 70 miles of the canal. The model has about 1,000 cross sections, and includes 13 check structures, 9 inverted siphons or inline culverts, and numerous bridges and other crossings. As the canal was designed and built in sections using "template" cross sections for each reach, a spreadsheet was developed to automatically create the HEC-RAS geometry file from the template sections and individual station invert elevations. The model was calibrated to nearly 600 observed water surface elevations surveyed during August and September 2003. The calibration was complicated because of the extremely flat slope of the canal (0.00005) and water surface, which meant that small changes in flow (which may occur daily) resulted in significant changes in water surface elevations.
Hydraulic Model Study of Delta-Mendota Canal
The flow capacity of the Delta-Mendota Canal (DMC) from the San Francisco Bay Delta to the O'Neill Forebay is restricted due to the original telescoping design flow requirements, freeboard, and changes in water delivery patterns, and possible ground subsidence over the past 50 years. The Bureau of Reclamation is considering various alternatives including the construction of an Intertie between the DMC and the California Aqueduct. To determine the feasibility of these alternatives, the capacity of the existing conveyance system and the areas where conveyance restrictions occur need to be determined. A one-dimensional hydraulic model, HEC-RAS, was development and calibrated to the upper 70 miles of the canal. The model has about 1,000 cross sections, and includes 13 check structures, 9 inverted siphons or inline culverts, and numerous bridges and other crossings. As the canal was designed and built in sections using "template" cross sections for each reach, a spreadsheet was developed to automatically create the HEC-RAS geometry file from the template sections and individual station invert elevations. The model was calibrated to nearly 600 observed water surface elevations surveyed during August and September 2003. The calibration was complicated because of the extremely flat slope of the canal (0.00005) and water surface, which meant that small changes in flow (which may occur daily) resulted in significant changes in water surface elevations.
Hydraulic Model Study of Delta-Mendota Canal
Walton, Raymond (author) / Jonas, Mark (author) / Stroppini, Alan (author) / Martin, Bob (author)
World Water and Environmental Resources Congress 2005 ; 2005 ; Anchorage, Alaska, United States
2005-07-01
Conference paper
Electronic Resource
English
Sedimentation in the Delta‐Mendota Canal
| Wiley | 1965
Land subsidence along Delta-Mendota Canal, California
| Springer Verlag | 1969
Land Subsidence Along the Delta‐Mendota Canal, California
| Wiley | 1968
Delta-Mendota Canal -- Technical record of design and construction
Engineering Index Backfile | 1959