Water depth

[Archana Patel 0]

Hi,

How to find water depth for all time steps.

Thanks and Regards

Archana

[Michael Turnley 0]

Hi Archana,

To get water depths at ALL time-steps, you will need to have specified the appropriate output interval before running the TUFLOW model. Please note that specifying output of every time-step for the 2d model output will result in excessively large files and is therefore not recommended. For the 1d model output, the output files will be large, but probably manageable, and will most likely exceed the limit of the number of lines Excel can open.

If you've already got TUFLOW model results, but don't have depths, you can calculate them using SMS. This approach will only give you depth at the saved time series intervals. You calculate a depth time series in SMS using data>data Calculator> and then subtracting the ground level from water surface level time series. Make sure you select all time-steps.

Hope this helps.

Cheers,

Mick

[peteraylett 0]

Hi,

If you want depth output at a specific location, then using PO is the way to go. This is when you to draw a point in a 2d_PO_ layer, and give it an attribute to specify the data you wish it to record. This is then read into the .tcf using the "Read MI PO" command. This will produce a .csv of the required data, recorded at an interval specified by the user which may be entirely independent of the main save interval; this uses the command "Time Series Output Interval".

This would require setting up prior to running the simulations however, as is generates the information during the run.

This is useful for looking at specific properties or sensitive areas around a proposed development for example. See the TUFLOW manual, section 4.8 and A.7 in the appendices.

[Archana Patel 0]

Hi,

Thank you.

yes we can get the result from 2d_po line but I know to extract water level and flow from 2d_po line and can display in .csv file.

Can you suggest to get depth information which attribute is used !

or to get ground level(so I can get depth from that)

I would really appreciate your help.

Regards

Archana

[peteraylett 0]

Ok, fair enough! So there is no depth PO output...

So, using head output; if the cell(s) under the PO objects are dry at the start of the simulation, the .csv will output the ground level (or lowest ground level if multiple cells are selected by a line) until the cell(s) gets wet, at which point it will start to output the average water level from the wet cells selected. So if the area starts off dry, then the ground level is the first number in the head column of data.

Otherwise, you'll need to extract the ground level either by inspecting the .2dm in SMS, or by examining the available GIS data (either the source elevation data for your terrain, e.g. LiDAR, the input files use to build your geometry in TUFLOW or examine the zpt_check.mif file to see what elevation was used for the cell(s) in the model).

From this you can, as you say, extract the depth from the head PO data.

Hope that makes sense!