Hello Everyone, My parents recently bought a house with a 2 acre backyard. The house sits up on a hill and the backyard slopes downward. At the bottom of the hill is a small stream that runs through the yard. My folks have had several retaining walls built on the backyard slope creating ledges where they are planting, grass, bushes, and gardens. What can they do irrigate these areas using the water from the stream ? What kind of pumps do they need ? Is this even a good idea ? Advice ?