A graph showing the relation between the stage (ordinate, dependent variable) expressed as a height and streamflow (abcissa, independent variable) expressed as a volume per unit time.
The plot representing the relation of stage or elevation and discharge at a particular structure or point in a stream. : Appears in the balance check output and gives the error in balance relative to the sum of the current storage and the cumulative outflow of water from the hydraulic system ().
A plot that shows the relationship between the stage and discharge (streamflow) of a specific stream at a specific location. It is customary to plot stream stage on the y-axis of the plot and discharge on the x-axis. The resulting relationship is normally a curve. Rating curves can be used to estimate discharge (which is time consuming and expensive to measure) using a single stage measurement (which can be collected with automatic equipment). The principle of a rating curve enables hydrologists to monitor the discharge of many streams simultaneously once gages have been placed to collect and report the stage of the stream.
For a given point on a stream, a graph of discharge versus stage. See loop rating; compare gauge relation.
a graph of depth (usually in feet) versus discharge (usually cfs)
A drawn curve showing the relation between gage height and discharge of a stream at a given gaging station.
Relationship between depth and the amount of flow in a channel, or storage in a reservoir.
Relationship between water stage (elevation) and water discharge in a channel.
A graph showing the relationship between the stage, usually plotted vertically (Y-axis) and the discharge, usually plotted horizontally (X-axis).
A rating curve allows stage measurements (height of the water) to be converted to flows, thereby establishing a flow record (hydrograph) for a given time period. The rating curve is developed by pairing stage data with individual point-in-time discharge measurements. To properly develop a rating curve, discharge measurements should be made at a variety of water stages, from low to high. A continuous record of river discharge or flow (hydrograph) is established by developing a mathematical relationship between water stage, which is continuously measured at the monitoring station.
A mathematical relationship between two values expressed as a continuous line. The most common ratings we use are stage versus discharge for streams and stage versus volume for reservoirs.