Our offices will be shut from close of business on Tuesday 23rd December 2025 until Monday 5th January 2026. Between these dates only credit card payments for ReFH 2 and WINFAP 5 will be dispatched, all other orders will go out in the new year. We will be providing limited software support on Monday 22nd and Tuesday 23rd December and the last posting date for LowFlows 2 dongles will be Thursday 18th December until Monday 5th January.
**Wishing you a very Merry Christmas and Happy New Year** :christmas_tree:
Our offices will be shut from close of business on Tuesday 23rd December 2025 until Monday 5th January 2026. Between these dates only credit card payments for ReFH 2 and WINFAP 5 will be dispatched, all other orders will go out in the new year. We will be providing limited software support on Monday 22nd and Tuesday 23rd December and the last posting date for LowFlows 2 dongles will be Thursday 18th December until Monday 5th January.
**Wishing you a very Merry Christmas and Happy New Year** :christmas_tree:

ReFH 2.3 Parameterisation of DAYMOD for observed events

The ReFH 2.3 Model uses Cmax to calculate antecedent conditions for an observed event in DAYMOD. For more details, see the technical guide here.

In the ReFH2 software version 3.0, the parameter initial conditions were calculated using the catchment descriptor Cmax, and were not updated if Cmax was changed by the user.

Versions 3.1 and above, however, maintain the dependencies between the DAYMOD internal variables (Cmax, FC, RD) when default values are changed by the user.

Download the latest version of ReFH 2 here.