Rating Curve

This unit specifies a rating curve at a given node. Its primary purpose is to allow water levels to be generated at Muskingum routing nodes.

Theory and Guidance

General

This unit specifies a rating curve at a given node. Its primary purpose is to allow water levels to be generated at Muskingum routing nodes.

This unit only gives information when required: it does not have any computation phase and can be placed anywhere in the data file. Basically, this unit is used when the flow is split at a rating junction, or when solving mixed reaches (those formed by combining hydrodynamic reaches solved by the full Saint Venant equations) and flood routing reaches.

Usage

To add a rating curve unit into your network, right-click on the network table and select 'insert' > 'rating curve', as shown below.

Only one node is attached to this unit.

Data

Datafile Format

General

Line 1 : keyword 'QRATING' [comment]

Line 2 : Label

Line 3 : n_dat

Line 4 to Line 3+n_dat : q_i, h_i

where n_dat is the number of data sets following, items in square brackets are optional, and other parameters are as defined in the data section.

Example

QRATING
UNIT056
         4
     0.000     0.000
     1.000     0.100
     2.000     0.200
     3.000     0.300