The phrase "active river" is correct and usable in written English.
It can be used in contexts related to geography, hydrology, or environmental science to describe a river that is currently flowing and shaping its landscape.
Example: "The active river carved a deep valley over thousands of years, showcasing the power of natural erosion."
Alternatives: "flowing river" or "dynamic river".
In its guts are an active river with a deep sink hole, underground waterfalls and huge chambers.
Crystal City, which was once an active river port, now has a population of about four thousand, with a preponderance of Italians, Greeks, French, and Slavs, and a considerable proportion of Negroes.
Gharials (Gavialis gangeticus) and Muggar (Crocodile) are seen with basking at the sand bars on every side of the active river channel.
Prior to 5400 cal yr BP, the Ispani basin was a floodplain of an active river system where overbank deposits with fluvially transported Castanea pollen were deposited.
The results show the Quelite River is an active river with a high suspended sediment load and migration of meanders associated to heavy rainfall.
This five-part chronosequence (not including the active river channel and floodplain) was analyzed in terms of the landforms that occur at each stage or surface.
Along the lower courses of the Ganges and Brahmaputra and along the Meghna, the land undergoes constant erosion and deposition of silt because of the shifts and changes in these active rivers.
The main body is characterized by the combination of distributary channels and three active river-mouth sand bars, which are elongated and extend southeastward (Li et al. 2002).
In the delta plain, the relatively high and dry alluvial ridges of abandoned or active rivers were most favourable for habitation.
The team argues that the now-buried channels were once active rivers that flowed from the Tibesti Mountains all the way to the Mediterranean and rivaled the Nile River as a thoroughfare for modern humans.
Changes in the planform of nine active rivers in the piedmont zone of upland Scotland are examined from series of rectified maps and aerial photographs at scales close to 1 10 000.
