Barbara Tsuyuguchi Civil Engineer Student

Hi Peter,

thank you very much for your answer. It was very helpful!!

I noted what you said about the values not being visible, but just to be sure, there isn't any way to access the calculated parameter values (In/outflow on top/bottom) for each time step?

Hi,

I am trying to calculate evapotranspiration in my model, and I would appreciate a lot if someone could help me with this issue.

For calculating evaporation, if I am using an expression that depends of water level, when simulation is running, does  the software recalculate the evaporation rate each time step using the current water level information? I am implementing it using an expression on In/outflow on top/bottom, but it seems it considers only the initial water level for the whole period. How can I fix it?

Regards,

Hi,

I am still having some difficulties to calculate evapotranspiration in my model, and I would appreciate a lot if someone could help me with this issue.

For calculating evaporation, if I am using an expression that depends of water level, when simulation is running, does  the software recalculate the evaporation rate each time step using the current water level information? I am implementing it using an expression on In/outflow on top/bottom, but it seems it considers only the initial water level for the whole period. How can I fix it?

Regards,

Hi,

For calculating evaporation, if I am using an expression that depends of water level, when simulation is running, does  the software recalculate the evaporation rate each time step using the current water level information?
I am implementing it using an expression on In/outflow on top/bottom. Is it right or should I do it another way?

Regards,

Dear Björn Kaiser,

I didn't understand the expression into brackets. I read about the meaning of nodes parameters you used, but I couldn't understand how this expression address the nodes of the first slice. Could you help us?

Best regards,

Dear Björn Kaiser,

thank you for your support.

The expression used is presented in the picture attached.

where 2.64 mm/day is the evapotranspiration rate when the water table is reaching the top of the aquifer/surface, and considering that evapotranspiration process acts over the aquifer only until the 2 m water depth (from the top of the aquifer/surface).

If I wasn't clear enough, please, let me know.

Best regards,

Best regards,

Hi.

I am trying to calculate the evapotranspiration from a shallow aquifer, but I am not getting good results.

As a first attempt, I am applying a linear function using the "Expression editor" in "inflow/outflow on top/bottom" to consider water depth. In order to do this, the outflow function is conditioned to "Hydraulic Head" and "Elevation Information".

Do you have some tutorial or video that can help me to deal with it? Or some example file?

Unfortunately, the video from preview version didn't help me that much. 

Best regards,