Laserfiche WebLink
• model, by setting the diameter equal to the average of the two most similar dimensions, <br />and the thickness or length equal to the remaining dimension. <br />Tables 3-2 and 3-3 show the relationship between the surface descriptions presented by <br />Pfeiffer and Bowen (1989) for use in assigning tangential and normal (restitution) <br />coefficients, and inferred equivalent site conditions. Table 3~1 indicates the ranges for <br />these parameters considered appropriate at this site. <br />Table 3-2: Surface Descriptions for Tangential Coefficient Selection <br />• <br />CRSP Description Equivalent Site Condition <br />Smooth hard surfaces such as pavement or <br />smooth bedrock surfaces <br />Most bedrock surfaces and talus without Sandstone cliff face; road pavement <br />vegetation <br />Most talus slopes with some low vegetation Talus covered upper foreslope; thin colluvium <br /> over marine shales on upper foreslope <br />Vegetated talus slopes and soil slopes with Thin colluvium overlying marine shales on upper <br />scarce vegetation foreslope; colluvium covered lower foreslope <br />Brush covered soil slope colluvium covered lower foreslope <br />Table 3-3: Surface Descriptions for Restitution Coefficient Selection <br />• <br />CRSP Description Equivalent Site Condition <br />Smooth hard surtaces 23< paving <br />Most bedrock and boulder fields Sandstone cliff face; road pavement <br />Talus & firm soil slopes Talus covered upper foreslope; thin colluvium <br />overlying marine shales on upper foreslope <br />Soft sail slopes colluvium covered lower foreslope <br />17 <br />