| GetRainRateAverage(DateTime, DateTime) |
Gets rain rate average from time start time 'start' to end time 'end'.
When start time and end time are equal then zero value is returned. |
| GetRainRateAverage(TimeSpan, DateTime) |
Gets rain rate average from start time 'end-period' to end time 'end'.
When 'end-period' is before the simulation start time, then the average is evaluated from simulation start to 'end'. |