IDamBreakErosion Properties

Final bottom breach slope of erosion failure.

Erosion failure critical shear stress. If the shear stress exceeds the critical shear stress, then the material in the breach erodes away.

Erosion failure downstream slope.

Erosion failure mode

Final bottom breach level of erosion failure.

Final bottom breach width of erosion failure.

Erosion failure grain diameter.

Initial level of breach when erosion failure is initiated at the breach crest.

Initial width of breach when erosion failure is initiated at the breach crest.

Initial diameter of the pipe.

Pipe failure calibration coefficient

Collapse Ratio (D/y) > 0: When the ratio between the diameter of the pipe and the distance from the top of the dam to the top of the pipe is larger than the collapse ratio the pipe collapses.

Volume Loss Ratio 0 - 1: When the dam collapses some of the material may be carried out without depositing on the bed of the breach. The volume loss ratio is the fraction of the material to be washed out immediately after collapse.

Level at which the pipe is located (initially).

Pipe roughness, used to calculate the Darcy friction factor. Increased roughness decrease discharge through the pipe.

Erosion failure porosity

Erosion failure side erosion index. The side erosion index is a proportionality factor that determines the amount of erosion of the breach sides. The higher the side index, the more material is eroded away from the breach sides. Generally in the [0.5; 1.0] range.

Erosion failure specific gravity.

Top width of the dam when using erosion based breach failure.

Erosion failure upstream slope.