PC-Progress Discussion Forums

Thank you for your response

Hello Prof Jirka, I want to ask of your view concerning the use of Hydrus to simulate flow in different media. I have a media of a mixture of 2:1:1 of straw, soil, and peat. I used Rosetta to generate the hydraulic parameters (aplha, n, Qr, Qs,) based on the textural classification, bulk density, an...

Hello Prof Jirka, Thank you for directing me to those papers. They were quite helpful. However, the problem that prompted me to ask the question persists. I did calibrate a model and I got a good fit between the predicted and observed. I plotted the data at each of the soil depths the statistical an...

Hello Prof,
Thank you for the papers references, I hope to find the answers I seek.

Hello Prof, I want to ask what could be responsible for a poor correlation between the observed and simulated values resulting from validation. During calibration optimize the hydraulic parameters alpha, ks, n, Qr, Qs, one after the other, and (two at once) to achieve a good fit. The R2 resulting fr...

Thank you Prof,
I do appreciate your response.

Okay Prof, am sorry to bother you, I know you have tight schedules. But I want to ask if it is ideal to develop a model with the results of the simulation and the hydraulic parameters generated from each of the 61 points (i.e. at each of the observation nodes representing each of the soil depth) rat...

Hello Prof, If you could please look through, the 61 points is attached as Drip irrigation inv-61, while the 305 data points is attached as Drip Irrigation inv-305. I set the initial time step as 0.001 and the minimum time step as 0.00001. A variable flux bc at the dripper, other upper regions aside...

Hello Prof, Initially, I set the FE size as 5cm instead of automatic and set an FE mesh refinement at the dripper as 0.5 and at the top corner left side as 2cm. Whenever I make changes to these settings, it does not go well with the functionality of the simulation. It is a surface drip irrigation sy...

Thank you Prof, I will look into it

Hello Prof Jirka, I want to ask if the total number of data points in inverse modelling can influence the simulation result. I created a drip irrigation domain using 2D following the examples from the manual. I have 305 data points of 5 observation nodes ( each 61 data). Whenever I run the simulatio...

Okay.
Thank you Prof

Thank you for your response.
But whenever I run the simulation to restrict the n value to be within 1-1.9, the model generates a poor correlation between the observed and the simulated values (low r2 value).

Hello Prof, My research entails modeling water flow through a soil mixture in a compartment. There are moisture probes that take moisture content at different depths of 10, 20, 30, 40 and 50 cm. Inflow into the system was converted into flux. I set the upper boundary condition as variable flux and t...

Thank you for your response.