A basic tenet of permaculture is for everything to have more than one use. In the example shown here, instead of having a fish pond separate from an orchard, agroforest or forest garden the two are integrated for increased efficiency. I’m starting to see this type of agricultural practice here and there. I imagine the idea sprang from growing fruit trees next to a lake or pond. If the surrounding land is about 6’-8’ (2m) above the water table, the tree roots can readily reach the water so no irrigation is needed after the first few years. There are lots of possibilities with this basic concept. The ratio of land to fish pond can be changed depending on what you want to produce the most of. The height can be adjusted according to the type of trees. And the overall size and shape can be adjusted to fit your homestead or farm.