Ventana software support forum

Hi, I have a model with time unit is "monthly". So, I put monthly water consumption (m^3) as "a stock" and then later, I need annual water consumption. If I create a stock of annual water consumption, there will be an awkward situation as a "monthly water consumption" w...

Hi Tom, When I was watching optimization process (choosing MCMC instead of Powell), I saw a message "simulation: ""xxx": errors: "xxx" best pay so far "xxx"". Why are there error statements ? and then if I stop optimization process, where do I get info ab...

Hi, Are there tools in Vensim that analyses sensitivity analysis using either SWAT-CUP (SWAT calibration uncertainty procedure) and SUFI-2 (Sequential uncertainty fitting ver 2) or include "P factor" and "R factor" ? R factors is the ration of the average 95PPu band and the SD of...

Hi again,

For calibration process, we can insert constants in the calibration process (optimization setup).
can we insert lookup variables in the optimization setup ?

Ok, thanks. I attach a revised Vensim model. Please open and go to Control Panel and open a graph name "historical and simulated volume of Algar aquifer". The graph shows two lines "Carrascal Ferrer aquifer" and "historical volume of Carrascal Ferrer aquifer". "Car...

Thanks a lots,
How do you get 48 hm^3?
Because I got 47.3 hm^3, not 48hm^3

Dear,

What do you mean cumulative loss of constant flow (monthly spring and upwelling flow)?
Could you please be more specific ?
As far I understand, cumulative is only for stocks and not for flow such as monthly spring and upwelling flow.

Dear,

I attach the model.

Please use fraction of spring and upwelling flow to
set monthly spring and upwelling flow

Cheers,
Bahri

Dear, Let's suppose I have 2 stocks as follows: Carrascal Ferrer Aquifer1= INTEG (infiltration after precipitation to Carrascal Ferrer+seepage from surface water to the Carrascal Ferrer aquifer -Carrascal Ferrer aquifer extraction - monthly spring and upwelling flow , initial Carrascal Ferrer aquife...

Hi again, What I meant is when I choose "constant" or "auxiliary" or "level", I can type any value(s) or expressions. But, for "data type", I did not any spaces to type values or mathematical expressions. Could you please tell me how to create a variable with ...

Hi, I have searched what I need to know in this forum but no luck. My question are: 1. How do I create variable with "data type" ? 2. Is that possible to use "accumulate function" to accumulate "a stock variable" ? 3. Is that "get data at time function" only w...