https://forums.autodesk.com/t5/civil-3d-forum/hydraflow-hydrograph/m-p/11455065#M46931 <P>my results for a 100yr Qpk is un-usually TOO high (per my PM) it show triple the Qpk for the 10Yr , any suggestion what might cause this</P><P>FIY my PM said it should b around 1.5 times from 10 to 100, instead of 3X&nbsp;</P><P>&nbsp;</P> Fri, 30 Sep 2022 19:44:25 GMT tranaT5WL9 2022-09-30T19:44:25Z https://forums.autodesk.com/t5/civil-3d-forum/hydraflow-hydrograph/m-p/11455065#M46931 <P>my results for a 100yr Qpk is un-usually TOO high (per my PM) it show triple the Qpk for the 10Yr , any suggestion what might cause this</P><P>FIY my PM said it should b around 1.5 times from 10 to 100, instead of 3X&nbsp;</P><P>&nbsp;</P> Fri, 30 Sep 2022 19:44:25 GMT https://forums.autodesk.com/t5/civil-3d-forum/hydraflow-hydrograph/m-p/11455065#M46931 tranaT5WL9 2022-09-30T19:44:25Z https://forums.autodesk.com/t5/civil-3d-forum/hydraflow-hydrograph/m-p/11455158#M46932 <P>I would go punch your PM..</P><P>&nbsp;</P><P>For example, I'm working on a floodplain study for a moderately sized tributary along the Front Range..</P><P>&nbsp;</P><P>and the 10yr = 875 cfs and the 100yr = 2,675 cfs</P> Fri, 30 Sep 2022 21:03:01 GMT https://forums.autodesk.com/t5/civil-3d-forum/hydraflow-hydrograph/m-p/11455158#M46932 fcernst 2022-09-30T21:03:01Z