Water is always a big issue.
On our farm most of the dams have no water in them and surprisingly, we see this as a positive. This is telling us that any rain that is falling is being absorbed into the soil and not running away across the top of it. Any rain that falls is effective rain - captured by the soil, plants and growing grass.
In a year like this one where we have received approximately half the average rainfall we have been able to maintain our animals without any supplementary feeding. Why attempt to capture water in irrigation dams when you can utilise the enormous capacity of the soil to do the same?