A method used in measuring Suspended Sediment in a stream wherein the sample volume taken is proportional to the streamflow at each of several equally spaced verticals. This technique results in a gross sample proportional to the total streamflow.
EQUAL TRANSIT RATE (ETR)
Meaning of EQUAL TRANSIT RATE (ETR) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012