hec hms reservoirs pumps

[ajugar]

ref 162-370040
I am having issues trying to use pump outlet in the reservoir and keep getting this error. has anyone had this issue before and any suggestions to model pumps in HEC HMS

would be greatly appreciated! Thank
ajugar

ERROR 42604: Computed head is less than minimum value in head-discharge curve for pump "1" of reservoir "aRE67".
ERROR 40242: Could not solve continuity equation for reservoir "aRE67".
ERROR 42604: Computed head is less than minimum value in head-discharge curve for pump "1" of reservoir "aRE67".
ERROR 40242: Could not solve continuity equation for reservoir "aRE67".
ERROR 40202: Root is not bracketed in Brents algorithm.
Lower bound: 102.20257880268471 Lower bound limit: -1.7E308
Upper bound: 102.45257880268471 Upper bound limit: 1.7E308
ERROR 40266: Could not compute outflow for reservoir "aRE67".
ERROR 40261: Reservoir routing failed at simulation time "6 March 2007, 24:00:00" for reservoir "aRE67".

 

[psmart]

I'm not an expert with HEC HMS, but it sounds like you need to extend the pump rating curve to lower head values. Although you may not intend to operate the pump at very low heads, the software needs a complete rating curve in order to do the routing calculation.

Peter Smart
HydroCAD Software

http://www.hydrocad.net