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In this method the reference fall (Fr) is modelled as a funtion function of the water level; Fr = f(h). This funtion function is represented by a parabola:
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ratingCurveTable this allows you to simply enter the pairs of q and h values.
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</ratingCurve>
<ratingCurve ratingCurveId="TheBigRiver">
<location>
<locationId>X1123</locationId>
</location>
<ratingCurveType>LevelToFlow</ratingCurveType>
<reversible>true</reversible>
<ratingCurveTable>
<ratingCurveTableRecord flow="0.100" level="0.054"/>
<ratingCurveTableRecord flow="0.500" level="0.155"/>
<ratingCurveTableRecord flow="1.000" level="0.244"/>
<ratingCurveTableRecord flow="1.479" level="0.317"/>
</ratingCurveTable>
</ratingCurve>
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Here is an example:
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<ratingCurve ratingCurveId="Test location">
<location>
<locationId>234206</locationId>
</location>
<ratingCurveType>LevelToFlow</ratingCurveType>
<reversible>true</reversible>
<ratingCurveEquation>
<lowerLevel>0</lowerLevel>
<upperLevel>0.391</upperLevel>
<equation>Power</equation>
<a>11.9001</a>
<b>0</b>
<c>1.55067</c>
</ratingCurveEquation>
<ratingCurveEquation>
<lowerLevel>0.391</lowerLevel>
<upperLevel>0.807</upperLevel>
<equation>Power</equation>
<a>16.6258</a>
<b>-0.1</b>
<c>1.8564</c>
</ratingCurveEquation>
</ratingCurve>
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