MIDUSS lets you design channels with two types of
cross-section to carry the current peak flow in the Inflow
hydrograph. If no hydrograph has been calculated you
can enter a constant flow value.
The cross-section can be:
- A general trapezoidal shape defined by a base width and left
and right sideslopes.
- An arbitrary shape defined by up to 50 pairs of coordinates.
In both cases a table of depth, gradient, velocity values is
displayed which represent feasible designs. You can select from
this list by double clicking on a row of the table or you can
specify a total depth and gradient explicitly.
Pressing the [Design] button causes a uniform flow analysis to
display the uniform flow depth, critical depth, average velocity
and channel capacity.
You can experiment with alternative schemes until satisfied.
Pressing the [Accept] button saves the current design.
An arbitrary cross sectin can be drawn with the mouse pointer
and the coordinates iof the selected points are shown
automatically in a grid. These coordinates can be edited to
refinen the drawing. If the length dX of a segment is
altered all the points to the right are adjusted automatically.
There is more channel information in our FAQ section.