You can get an initial idea of water requirements by mapping the plants' natural distribution in relation to water tables and standing water.

I agree with Dr Pegman that observations in nature will give you initial information. Separate the plants into free-floating, floating-leaved rooted, and submerged-leaved rooted, to get more accurate estimates. Climatic conditions are also important - where wet weather is frequent and humidity high, aquatic plants will often survive and grow as an aerial sward. If seasonality is sharp, this is less likely. Best wishes, Julian

I attach paper on that