python_codes.CourrechDuPont2014.Flux_at_crest#

Flux_at_crest(alpha, theta, Q0, gamma=1.6)[source]#

Calculation of the sand flux at the dune crest:

\[Q_{\rm crest} = Q_{0}\left[1 + \gamma\sin\vert\theta-\alpha\vert\right]\]
Parameters

  • alpha (scalar, numpy array) – Dune orientation \(\alpha\).

  • theta (scalar, numpy array) – Flux orientation \(\theta\) in degrees.

  • Q0 (scalar, numpy array) – Flux at the bottom of the dune \(Q_{0}\).

  • gamma (scalar, numpy array) – Flux-up ratio \(\gamma\) (the default is 1.6).

Returns

Flux at the dune crest \(Q_{\rm crest}\)

Return type

scalar, numpy array

Examples

>>> import numpy as np
>>> alpha = 10
>>> theta = np.random.random((1000,))*360
>>> Q0 = np.random.random((1000,))*50
>>> Qcrest = Flux_at_crest(alpha, theta, Q0)