topic Re: Fire Hydrant Flushing Formula in ArcGIS Survey123 Questions

Fire Hydrant Flushing Formula

GISManager4 — Mon, 28 Mar 2022 13:02:42 GMT

Need assistance creating the following formula to capture GPM from fire hydrant. Attached is the xlsx form

Re: Fire Hydrant Flushing Formula

IsmaelChivite — Mon, 28 Mar 2022 14:30:12 GMT

((2.83*(pow(${outlet_size},2)*${water_length})) div (sqrt(${height}))

round(((2.83*(pow(${outlet_size},2)*${water_length})) div (sqrt(${height})),2)

Re: Fire Hydrant Flushing Formula

GISManager4 — Mon, 28 Mar 2022 17:45:39 GMT

I get an error message when using both formulas

Re: Fire Hydrant Flushing Formula

GISManager4 — Fri, 29 Apr 2022 18:29:13 GMT

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

Re: Fire Hydrant Flushing Formula

MartinPflanz — Wed, 11 May 2022 18:00:05 GMT

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.