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Darwin Calibrator
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Darwin Calibrator
Didi
over 15 years ago
I have taken as field datas pressure and demand. Then I entered in the tab "observes Target" the pressure and in the tab "Demand Adjustments" the additional demand. After calculating and exporting the adjusted roughness to scenario I checked the results in the WaterGEMS. The problem is that I don't get the right results (observed datas). What have I done wrong?
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Martin Pflanz, P.E.
Fri, Aug 29 2008 10:48 PM
Didi, can you help out with some clarification on your question, are you working out a workshop and trying to get the results that are part of the workshop? or Calibrating using Darwin Calibrator for an actual system? If you are Calibrating for a real system and have entered the field data set(s), Darwin will in short go through many many iterations, making adjustments to the Hazen-Williams C or the Demand at the nodes to "try" and converge on the field data set(s) provided. The Darwin solutions will reflect the best solutions based on either a certain number of trials without a significant change or a total number of trials. So the old adage comes to play here... if it is good data in, Darwin has a lot better shot and providing good data. Likewise, if the field data was done with poorly calibrated equipment or high tolerances in readings, then the predicted data will not closely match the observed data. The process gets a bit more complicated if you factor in any unknown closed valves, mis-reported pipe diameters etc. Please reply if you need more assistance.
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