Darwin Calibrator fitness

Question

Hello 
 I am doing a leakage detection study on darwin calibrator on two models one has almost 700 junction and the other 6000. 
 but the problem that I don't have enough points and readings and my fitness is high and I have maximized the trials and its still high but I know it cant get better and I am satisfied but my question is there a maximum acceptable number for fitness or a threshold for it??? 
 
 Regards

Tom Walski · Answer

The underlying logic in Darwin Calibrator is that your model is essentially perfect except for the extra head loss caused by leaks. 
 If you are having problems, the reason is usually that you have a mistake in you network layout, unknown closed valves, incorrect pipe roughness. inaccurate boundary conditions (tank levels, pump curves, valves settings, pump status) and base demand allocation. If these aren't pretty good, Darwin can't pick up on the small discrepancies due to leaks that point out leak locations.

Jesse Dringoli · Answer

To add to Dr. Walski's reply - the following articles contains more advice on the topic of calibration and leakage detection, which you may find useful: 
 Water Model Calibration Tips 
 Water Loss Management

Darwin Calibrator fitness

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