In the extreme downstream reaches Rufous-crowned Sparrow, California Thrasher and American Kestrel can be observed on chaparral slopes.

The river lives up to its name, often showing a deep bluish-green color, especially in its downstream reaches.

The stream has a greenish brown appearance and generally has lush vegetation growing all the way to its margins throughout most of its course of the middle and downstream reaches.

The report suggested that if eight Gradient Restoration Facilities were installed in the downstream reach, that should be enough to slow the water, allowing sediment to settle and making fish passage easier.

The reservoir stores water for the agricultural area surrounding Lovelock, which is at the far downstream reach of the Humboldt, near the Humboldt Sink.

However, as a result of the silt flushing, some detrimental effect on the biota was noted by local people of the area in the downstream reaches of the river below the dam.

Of note is that the downstream reach of the river "may be uplifting as much as ten times faster than the headwaters area".

Direct discharge does not disperse the water over a wide area; the environmental impact is focused on a particular segment of a river and its downstream reaches, or on a coastal waterbody.

In the downstream reaches of those polluted rivers are wheat and cattle growers who appeal to a high-value niche market by raising wheat and beef without adding their own chemicals.

Flooding in the downstream reaches did not realize the modern frequencies since all the creek reaches could absorb more excess water from peak rainfall events.