Applications
Alluvial fan flooding - Venezuela
Use these project examples to learn about the various model components. The data files can be accessed from the downloads page.
Barnard Creek Mudflow Alluvial Fan, Centerville, Utah
Barnard Creek is a completely urbanized alluvial fan with a small debris basin at the fan apex. FLO-2D was applied to delineate the potential water flood and mudflow hazard on the fan. Streets, buildings and the debris flow overflow were simulated. The various flood scenarios that can be simulated include water flooding, rainfall, mudflow, and rainfall and mudflow.
Diamond Alluvial Fan, Las Vegas
A consulting firm conducted an alluvial fan rainfall/runoff study above a proposed development in Las Vegas, Nevada. Rainfall was simulated in the upper basin and runoff was routed to the development site. This project represents a good example of simulating the hydrology of the combined basin and fan complex.
California Aqueduct, Central Valley, California
Flows in the California Aqueduct were simulated using a trapezoidal channel and a uniform slope. The channel was represented by 97 500 ft grid elements. Knowing the design discharge and the channel geometry, slope and roughness, the flow hydraulics can be compared with the analog solution to Manning’s equation for steady, uniform flow. FLO-2D correctly predicts the flow depth and velocity.
Monroe Creek Alluvial Fan, Richfield, Utah
Monroe Creek bisects a large alluvial fan in central Utah. There is a significant supply of boulders from the upstream watershed. The Corps of Engineers used FLO-2D to conduct an unconfined flood simulation of overbank flows. Rectangular, trapezoidal and natural shaped cross sections were used to represent the channel geometry. Overbank flooding and return flows to the channel were simulated to delineate the flood hazard.
Rio Grande, New Mexico
The Middle Rio Grande from Cochiti Reservoir to Elephant Butte Reservoir (173 miles) is being modeled through a joint project of the Corps of Engineers, Bureau of Reclamation and Fish and Wildlife Service. A portion of the entire reach is provided to demonstrate the cross section routine in the FLO-2D model. The reach from San Acacia Dam to San Marcial USGS gage (about 40 miles) is presented. Levees are simulated.
Rogue River, Oregon
The Rogue River FLO-2D project in Oregon was developed by a consulting firm. The 15 mile reach of river includes numerous split channels and old meander bends. The floodplain was mined for gravel and a number of deep gravel pits are part of channel-floodplain interaction. A weir is defined as the channel outflow and provides water surface control for the lower end of the system.
Whiskey Petes Alluvial Fan, Stateline, Nevada
An alluvial fan flood hazard delineation study was conducted above a casino resort. Flows over the alluvial fan were collected at railroad berms and directed into culverts that could overtop the railroad embankment. The culvert outflows were directed at the casino. A concrete channel was designed to collect the flows upfan of the casino and convey them laterally across the fan. Sediment transport was analyzed to determine the potential loss of channel conveyance due to sediment deposition. Flow runup in the channel was a design consideration. The Desert Research Institute in Las Vegas also analyzed the Whiskey Pete’s flows with FLO-2D to determine the potential for overtopping the railroad embankment.