"located upstream" is correct and usable in written English in a variety of contexts.
For example, "The salmon spawn in the rivers located upstream of the lake."
Commercial forests are located upstream in the mountainous and rainier interior, away from rural settlements.
This mechanism is located upstream from the image transfer station.
A variety of small sequence motifs, located upstream of minimal promoters influence gene expression.
Compared to present-day Vertisols occurring in the piedmont, mima-like mounds are located upstream.
Mean DO level and DOS were highest in sites located upstream region.
The inserted sequences were regulated by a spore-specific promoter located upstream of p19.
One other ultrasonic anemometer, located upstream at cube height, provided reference wind data.
Located upstream of the Clinch River, Norris Dam is part of the Project's story in Oak Ridge.
It is located upstream of the TATA-box [59].
Rs1884613 is located upstream of HNF4A and has no known function.
In the photoperiodic control pathway of rice, OsGI is located upstream of Hd1 and Hd3a.
