Hydraulic model

Hydmod is subject to several assumptions:

• the flow must be steady in time, gradually varying in space, 1-dimensional, and on slopes which are not too steep;

• energy losses due to channel sinuosity are negligible;

• the gap wind should bear some resemblance to a dense fluid flowing in a channel

• no entrainment of, or interactions with air above

Hydmod requires the following data as input:

• Q (the volume flow rate)

• cross sectional area, A, by height at locations along the channel

• e, the elevation of the channel floor along the channel

• $\theta_{1}^{}$,$\theta_{2}^{}$

• dP/dx, the ``synoptic'' pressure gradient

• C, drag coefficient values

• h_f, the height of gap wind at the end of the channel

Hydraulic model.