A Comparative Analysis of Hazard Models for Predicting Debris Flows in Madison County, Virginia

By

Meghan M. Morrissey, Gerald F. Wieczorek, and Benjamin A. Morgan
Open-File Report 01-0067

2001

Click on an image for a 2X view.

Figure 5. (A, B) Pressure head-depth curves during the first 16 hrs of the storm and up to 4 days after the storm, respectively calculated by Eqns. 5a and 5b for a soil cohesion of 4 KPa, diffusivity of 10^-4 m/s, k/I =1, water table depth at 2 m. The dash-dot line is the initial hydrostatic pressure curve and the dotted line is the hydrostatic pressure curve when the soil is completely saturated. (C) Factor of safety-depth curves calculated from Eqn. 7 for the pressure head response in (A, B). Color curves denote 4h or 1day (d) (green); 8h or 2d (red); 12h or 3 d (pink); 16h or 4d (blue) as labeled.