What is the main difference between the perennial system of irrigation and the basin system of irrigation?

The Basin System is only used by modern farmers.

The Basin System allows for the planting of multiple crops while the perennial system only allows for the planting of one main crop.

The Perennial System allows for the planting of multiple crops while the basin system only allows for the planting of one main crop.

There is no difference between the two systems of irrigation.