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-rw-r--r--doc/fullswof-utils.texi17
-rw-r--r--images/rating_curve.pngbin0 -> 22538 bytes
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diff --git a/doc/fullswof-utils.texi b/doc/fullswof-utils.texi
index b98e587..d00e999 100644
--- a/doc/fullswof-utils.texi
+++ b/doc/fullswof-utils.texi
@@ -438,6 +438,23 @@ are calculated. From these values the hydraulic radius is calculated,
allowing the conveyance to be determined. Finally, the discharge is
calculated from the conveyance.
+@float Figure,ratingCurve
+ @image{./images/rating_curve}
+ @caption{Rating curve for the right hand panel of the top boundary.}
+@end float
+
+An example rating curve is shown in @ref{ratingCurve}. The data for
+this curve was generated from the topography and boundary definition
+file provided in the @file{demo} directory.
+
+Together, the rating curves establish the connection between water level
+and discharge at the boundary. The @emph{makeBoundary} program
+identifies the panels that are filled and the panel that is part-filled.
+The discharge in the part-filled panel is set so that the sum of the
+discharge values is equal to the target flow. The last step is to
+interpolate the water level from the rating curve of the part-filled
+panel.
+
@node Demos, GNU Free Documentation License, Boundary Definition File, Top
@comment node-name, next, previous, up
@chapter Demos
diff --git a/images/rating_curve.png b/images/rating_curve.png
new file mode 100644
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+++ b/images/rating_curve.png
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