Geoscience Reference
In-Depth Information
Figure 14.9
Summary of regression relationships of drainage area to fan area and fan gradient (data for Spanish fans from
Harvey, 1987, 1997; for Murcia (Spain) from Silva
et al.
, 1992; for California Coast Ranges from Bull, 1962b, 1977; for Death Valley
region from Denny, 1965, Hooke,1968, and Hooke and Rohrer, 1977).
(where
S
is the dimensionless channel slope). For the three
Spanish fan groups, the exponent
g
ranges from
gradients. There are insufficient data for a comparison
with American fan channels, but a comparison can be
made with small Spanish nonfan stream channels (Har-
−
0.2 to
−
0.4 and the constant
f
is between c. 0.02 and 0.06. The
