Depends on what kind of gardener you are, but i recommend growing willow on the south side and cutting the twigs every autumn. This will shade out the pond in spring/summer. People speak of using pigs in there that use their body weight mucking about in the pit and condensing the mud so much that it condenses and holds water. Permies level 10 though, that tip,
I use the rainwater of the house to
feed a small lined pond. Next to the veggiepatch. An IBC tote is filling up and the overflow goes in there. I can connect thousand liters to the overflow pipe that flows into the pond. It's never dry and i scoop water out to hose the veggies with rich warm water all summer. It has created so much bio diversity which helps contains pests like slugs and such that has made the
gardening easier. Many different plants attract many species of insects attracting birds which enrich the garden with droppings as well.