Sediment Transport-Flow or Temp Time Series Error

[Anonymous]

Hi,

This is my first time modeling in HEC RAS. I get the following error:
“Flow or Temp Time series date is not sufficient to run requested time window”.

What am I doing wrong?

I read previous threads regarding the same error and specified the temp and saved my files and it didn’t help.

Any ideas?

[Anonymous]

Any suggestions? I have a project due shortly and can not find a solution. Any help would be greatly appreciated.

[JohnLonergan]

Hi,

I had a similar problem before I specified my temp series.
After I put in my temp data it worked (although I am still encountering other issues).

What I would advise is to review your flow and temp data and ensure that your flow and temp data cover the same period. ie, if you have 50 hours (rows) of flow data you should also have 50 hours (rows) of temp data. Also check that the dates and times correspond correctly in both tables whether that be start dates specified manually (fixed) or simulation time (automatic).

I hope this helps. Let us know how you get on as, as I mentioned, I am having issues with sediment transport calcs too. See my thread “Sediment transport in small hydro power <1MW" if you're interested.

[Anonymous]

Thank You John for a prompt response. Will let you know and check your thread.

[Anonymous]

Ok, I did fix the number of rows as you suggested and still getting the same error.

I think the problem is within the Flow Duration and Computation Increment. How do I specify those? I don’t find the manual too helpful on that section.

[Anonymous]

Any suggestions?

[jadams]

Please specify the start date and time for your Flow data and temp data and the end time.
Also specify the start and stop date of your run.

[Anonymous]

Jadams,

I have already specified my Data Starting time reference same as Simulation time. Where do I input the end time?

Start and stop date of my run are specified in the window when I ran my analysis, correct? If so, I have specified those as well.

[JohnLonergan]

You don’t need to enter an end time as such in the quasi unsteady flow data file. The end time will automatically be set as the time on the last row of data you entered.
However when you click “run sediment analysis” you must enter the start and finish time separately. You must make sure that the dates/times entered are within the range of dates/time contained in the flow data you enter.
In this “plan” page also ensure that the dates/times are entered in the correct format. ie
Date Time
“02AUG2013 0833” is the correct format but
“02 AUG 2013 0833” and “2 AUG 2013 08:33” are the incorrect format as they have spaces in the date field or “:” symbols in the time. Check this.

Also, ensure that you have specified a downstream boundary condition. Normal Depth is a good starting point. Enter the bed slope of the reach in the friction slope box that pops up.
I hope this helps you.

[Author]

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