What is happening
You are called to a catchment model that keeps predicting phantom floods.
The balance never closes. Evaporation accounts for 340 mm against a 505 mm total, and the precipitation figure entered is wrong.
Water cyclesRunning
Water accounted
664mm
Catchment total
505mm
Water cycle loop. Precipitation at 324 mm. Water accounted 664 mm, Catchment total 505 mm. Currently water accounted is over by 159 mm.
What has to balance