One instance of a volumetric measurement where the discharge is measured by the change in volume of water in a container over a given time duration. The volume of water in the container at the start of the measurement. The volume of water in the container at the end of the measurement. The change in volume of the measurement, which is the difference between the starting and ending volumes. The time duration of the measurement in seconds. The stream discharge of the discharge measurement in this channel. The default units are in cubic feet per second.