Compute critical discharge (normalized) for the onset of incision

Determined by setting I=0 in equation 8 (instantaneous discharge) of Dibiase and Whipple (2011)

Qcritical(ks, Psi, K, n, gamma)

Arguments

ks

Channel steepness index
Psi

Incision threshold
K

erodibility
n

slope exponent of the stream power law
gamma

discharge exponent

Value

Normalized critical discharge