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05.LaMettry - Pondnet - 061815Project: Audobahn Motorplex Location: Chanhassen, Minnesota Prepared for: Prepared by Sathre-Bergquist, Inc. Date: October 19, 2006 Updated: June 18, 2015 FLOW AND PHOSPHORUS ROUTING IN POND NETWORKS PONDNET 2.1 W. Walker March 1989 INPUT VARIABLES.... UNITS case labels Pond watershed area acres 19.35 runoff coefficient (Impervious Fraction) -0.57 pond surface area acres 1.19 pond mean depth feet 5.01 upstream pond p load lbs/yr 0.00 upstream pond outflow ac-ft/yr 0.00 OUTPUT VARIABLES........ outflow p load lbs/yr 10.97 outflow volume ac-ft/yr 26.01 outflow p conc ppb 155.19 pond removal % 65.51 total removal % 65.51 ASSUMED EXPORT FACTORS............. period length yrs 1.00 period precipitation inches 28.30 runoff total p ppb 450.00 runoff ortho p/total p -0.35 relative decay rate -1.00 unit runoff in/yr 16.13 unit export lbs/ac-y 1.64 POND WATER BUDGETS...................... runoff 916.00 26.01 upstream pond ac-ft/yr 0.00 total inflow ac-ft/yr 26.01 outflow ac-ft/yr 26.01 POND PHOSPHORUS BUDGETS................... runoff lbs/yr 31.82 upstream pond lbs/yr 0.00 total inflow lbs/yr 31.82 net sedimentation lbs/yr 20.84 outflow lbs/yr 10.97 HYDRAULIC PARAMETERS............ pond volume acre-ft 5.96 vlawmo pond volume acre-ft 2.30 relative volume inches 6.49 residence time years 0.23 residence time days 83.66 overflow rate ft/yr 21.86 inflow phos conc ppb 450.02 outflow phos conc ppb 155.19 p reaction rate - 5.51 1-rp - 0.34