It is also understood from the survey that an almost unlined meandering channel had been excavated south of the waterfall that feeds into Osawa-no-ike Pond and that this is a shallow, curving garden stream had been created by imitating a natural flow.
また滝の南方には素堀に近い蛇行溝が開削されて大沢池へ注いでいたことが調査でわかっていて、これは自然の流れを模して造られた庭園の遣水施設である。