Hi Niva, You can make a ...

 Hi Niva,

You can make a canal network in GIS. However, before you start the process you need to think through why you want it in GIS and what do you want to do with the system that you can't do now. for example - do you want to use if for:

operations,

asset management

hydraulic modelling

linking with other existing systems?

The other aspect to consider is what you are willing to pay to create such a system and then maintain it.

Once you have progressed these issues there a lots of possible solutions.