Need assistance creating the following formula to capture GPM from fire hydrant. Attached is the xlsx form
Formula to calculate Gallons per Minute for a hydrant flush
round(((2.83*(pow(${outlet_size},2)*${water_length})) div (sqrt(${height})))*${time_flow},2
Cross-posting due similar topics related to fire-hydrant flow estimates.
https://community.esri.com/t5/arcgis-survey123-questions/calculation-for-hydrant-flow-rate/m-p/1164551
Given that the flow leaving a hydrant is turbulent rather than laminar, it could be anticipated that there would be substantial variation in the calculation results per site. Not to mention determining/deciding where to actually measure the L when a hydrant spray/spread hits the ground could vary based on observer methods. If such an approximated result aligns with the data needing to be recorded, a timed flow x estimated flowrate may provide a rapid and standardized approximation (simple calculation). If accuracy is required for the data entry, a temporary flow meter would be ideal.
I get an error message when using both formulas
.
((2.83*(pow(${outlet_size},2)*${water_length})) div (sqrt(${height}))
or
round(((2.83*(pow(${outlet_size},2)*${water_length})) div (sqrt(${height})),2)
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