How can i downgrade a .wtg file?

I followed that instruction but i couldn't import anything from the Epanet file. And it shows up this 2 user notifications messages

Hello Miguel,

Can you please upload the .INP file and the original WaterCAD model from which you exported the EPANET file for our testing?  

Sharing model files

https://we.tl/t-EUeZRjMDAv

Hello Miguel,

I tried to compute the model in EPANET as well, and there were error messages in that program as well. There are a few issues keeping the model from computing. I would recommend validating the model first, to review the issues. 

First, there is a tank without any elevation data. If you look at the tank T-1, there is no operating range for the tank. This data will need to be included. 

Second, there are disconnected nodes in the system. This appears to be because some junctions are not connected to pipes. This can sometimes occur when creating a model. For instance, if ModelBuilder was used and junctions were created at a tee of a couple of pipes, the junction will be overlaying the pipe and not actually connected to it. You can use the Batch Pipe Split tool to help fix these.

If this doesn't help, it might be good to see the original WaterCAD model as well. If you can provide the .wtg.sqlite file, we would be able to check that model to see if there are any issues too.

Regards,

Scott

Hello Scott.

I followed your advice and then i was able to validate and compute without error messages. 

I still got other doubt related to this network.

This tank is fed by a water treatment station located at J-271, do i need to put in this node any intake conditions or just add a tank, not a reservoir? 

Thank for your time and availability !

Hello Miguel,

This depends on how the flow from your water treatment plant is regulated. If you have a constant inflow rate for the duration of your simulation you can add a "negative demand" to the junction J-271 to simulate an inflow and keep the pattern as fixed. However, if your inflow is fluctuating then you would need to specify a pattern to simulate the same.

Another condition would be having a fixed hydraulic grade as a reservoir. This can be used if you know the water level at the sump of your water treatment plant.  This will provide the necessary inflow to your system from the water treatment plant.

Using a tank can also be one option, however; the tank holds a finite volume of water as opposed to a reservoir. So there are chances that a tank might empty soon if the flow the the outlet is not regulated. Still it can be used for a more accurate representation of the system.

See the following article on modeling components or elements which are not specifically available in WaterGEMS / WaterCAD;

Modeling devices and components that are not explicitly available as an element

This will give you some idea how to model such components.

Hope this helps.

Hello Miguel,

This depends on how the flow from your water treatment plant is regulated. If you have a constant inflow rate for the duration of your simulation you can add a "negative demand" to the junction J-271 to simulate an inflow and keep the pattern as fixed. However, if your inflow is fluctuating then you would need to specify a pattern to simulate the same.

Another condition would be having a fixed hydraulic grade as a reservoir. This can be used if you know the water level at the sump of your water treatment plant.  This will provide the necessary inflow to your system from the water treatment plant.

Using a tank can also be one option, however; the tank holds a finite volume of water as opposed to a reservoir. So there are chances that a tank might empty soon if the flow the the outlet is not regulated. Still it can be used for a more accurate representation of the system.

See the following article on modeling components or elements which are not specifically available in WaterGEMS / WaterCAD;

Modeling devices and components that are not explicitly available as an element

This will give you some idea how to model such components.

Hope this helps.