I have used HEC-HMS in the past and just downloaded the latest version.
I got my entire model in. The problem is the control specifications will not save. I have entered start dates and times. There is no "apply" or "ok" to hit after entering this data.
If I click on something else in the...
When modeling a drainage area in SWMM that is completely impervious using curve numbers. A CN of 98 is put in but also the percent impervious is set to 100%. In this case, is any rainfall lost as initial abstractions or does the 100% impervious imply that all rain contacting it will become...
As far as that curve goes, it was something I changed but must not have saved. I just erased points 4.7, 4.8 and 4.9.
I don't think that will solve all of my problems........... but who knows.
Alright.
So ran a storm and a couple weeks of rain data using 2 second intervals and not seeing nay improvement.
I look at the precipitation and runoff in the status report and it matches with the rain.
Then when i take the total flow into the trench (cfs) and sum those flows and convert...
Runoff Quantity continuity error of -0.21%
No Flow Routing continuity error
Routing every 5 seconds
Wet weather every 5 minutes
Reporting every 15 minutes
Then I sum the 15 minute data.
The inflow to the trench is where the runoff volume of 55.621 drops to 46.@#$.
I am running a model with a year of rain data. It rained 55.74 inches in that year.
My subcatchment is 0.468 acres of 100% impervious area. For whatever reason, the rain turns out to be 55.621 inches which i am assuming comes from the change that SWMM does from volume input to intensity which...
