Rill or Stream

The principle of creating a stream or a rill are more or less the same. A stream is designed to appear entirely natural, whereas a rill, or channel, is a formally contained stream. You can use a slope by creating an apparently natural source of water: this is achieved by pumping water to a disguised source, giving the impressions of water coming up from a srping. The character of the stream or ill will be altered by the gradient of the ground. The steeper the gradient, the greater the potential for pools and waterfalls.