This use case looks perfect for solar. Just have two smallish reservoirs, big enough to keep more or less a full-day worth of water for the canal, one at the ri

This use case looks perfect for solar. Just have two smallish reservoirs, big enough to keep more or less a full-day worth of water for the canal, one at the river level and one at the high level. Then you don't even have to worry about not having solar power during the night.