Precision - Reality check

I read a previous post on precision indicating that it can be set to 0.01 ft or less. Isn't the real world precision is based on the least precise measurement used in the calculation. Reporting to planners that max flood elevation has a precision of 0.01 ft when the breach is measured to the nearest foot gives the planners a false sense of reality.

Based on this, what would the level of precision for flood elevation if one used breach dimension measurements that were to the nearest whole foot or nearest whole meter?

Thanks, Paul.

[phil_engr]

Hello Paul,

The computations are accurate when the precision is 0.01ft or less. The water balance equations and computation iterations are accurate in the precision range of 0.01ft or less. Saint-Venants Equation solving will be accurate if we fix the precision range as 0.01 ft or less. In real life we cannot achieve the precision upto this level, but the computations in the DAMBRK model will stabilize in this precision range.

Thanks.