The phrase "a natural stream" is correct and usable in written English.
It can be used to describe a watercourse that occurs naturally in the environment, as opposed to being man-made.
Example: "The hikers followed a natural stream that wound through the lush forest, providing a serene backdrop to their journey."
Alternatives: "a wild stream" or "a freshwater stream".
In Lourdes, the water springs through rocks from a natural stream.
The creek, once fed by a natural stream, now starts at the output pipe of a wastewater treatment plant.
What was once a "natural stream," he writes, is now "a dispersed and brachiating resource-distribution system".
The outlet for a drainage system may be a natural stream or river or a large constructed ditch.
"Cheonggyecheon is not a natural stream systematically restored, but a kind of artificial fountain in which running water is pumped up and sent flowing along the course.
In direct reuse, treated wastewater is piped into some type of water system without first being diluted in a natural stream or lake or in groundwater.
In one study performed in a similar transgenic salmon, it was shown that fish with a genetically modified growth hormone actually grow at a much closer rate to wild fish in a tank that simulates a natural stream-like habitat compared to a conventional hatchery tank.
River, (ultimately from Latin ripa, "bank"), any natural stream of water that flows in a channel with defined banks.
As a result, the property is carefully husbanded, because a clean, beautiful and natural stream full of trout is more valuable for bringing in visitors and people who fish than one that is less so.
We then derived an empirical equation to predict reach-scale hydraulic resistance Ct from thalweg mean depth, thalweg mean residual depth, and large wood volume based on field dye transit studies, in which total hydraulic resistance Ct was measured over a wide range of natural stream channel complexity, including manipulation of large wood volumes.
As he tours North Carolina for his wife, Elizabeth, and her run for Senate, he has rejected it in favor of a more natural stream-of-consciousness patter.
