In areas with inadequate water reservoir release or canal flow, the ________ system is more rational.

If adequate reservoirs are available, then canal system is used, in which the main canal, which receives water from one or more reservoirs or from rivers, is divided into branch canals having further distributaries to irrigate fields. However, in areas where canal flow is insufficient or irregular due to inadequate reservoir; the lift system is used. Water is directly drawn from the rivers. Tanks and wells cannot be the answer as they store run-off water or water through seepage.