1. For a split flow
optimization, first of all we need to estimate the initial supplies of the
total flow in both separate channels. HEC-RAS will then uses these
initial flow estimates to perform computation from downstream to upstream on both the channels.
2. From Steady Flow Analysis click on Options and select
Flow Optimization and under the Flow Optimizations dialog box you need to
select the check box for Junction.
3. When the junction tab is selected, perform the analysis
by computing the water surface profiles for all the reaches.
4. Then compare the computed energy grade lines for the
cross section just downstream of the junction.
5. If the energy in all the reached below the junction is
not within a specified tolerance (0.02 feet). Then the flow going to each reach
is re-distributed and the profiles are re-calculated.
6. The methodology continues until a balance is reached.
No comments:
Post a Comment