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<br />PONDNET 2.0 Detention Pond Network Performance Analysis <br />W. Walker October 1988 <br /> TITlE--> Western Auto, Roseville (fully developed conditions) <br />INPUT VARIABLES.... UNITS <br />case labels Pond 1 Existing <br />watershed area acres 2.8 2.8 <br />runoff coefficient 0.93 0.91 <br />pond surface area acres 0.18 0.0001 <br />pond mean depth feet 2.9 0.0001 <br />upstream pond p load Ibs/yr 0 0 <br />upstream pond outflow ac-fUyr 0 0 <br />OUTPUT VARIABLES........ <br />outflow p load Ibs/yr 6.7329336 15.71311027 <br />outflow volume ac-fUyr 9.8464585 9.634706682 <br />outflow p cone ppb 251.57925 600.0317182 <br />pond removal % 58.072346 1.16456E-05 <br />total removal % 58.070124 -0.005286367 <br />ASSUMED EXPORT FACTORS............. <br />period length yrs 0.41917 0.41917 <br />period precipitation inches 19.02 19.02 <br />runoff total p ppb 600 600 <br />runoff ortho p/total p 0.3 0.3 <br />relative decay rate 1 1 <br />unit runoff in/yr 42.199108 41.29160007 <br />unit export Ibs/ac-y 5.7351626 5.611825749 <br />POND WATER BUDGETS...................... <br />runoff ac-fUyr 9.8464585 9.634706682 <br />upstream pond ac-fUyr 0 0 <br />total inflow ac-fUyr 9.8464585 9.634706682 <br />outflow ac-fUyr 9.8464585 9.634706682 <br />POND PHOSPHORUS BUDGETS................... <br />runoff Ibs/yr 16.058455 15.7131121 <br />upstream pond Ibs/yr 0 0 <br />total inflow Ibs/yr 16.058455 15.7131121 <br />net sedimentation Ibs/yr 9.3255216 1.82988E-06 <br />outflow Ibs/yr 6.7329336 15.71311027 <br />HYDRAULIC PARAMETERS............ <br />pond volume acre-ft 0.522 0.00000001 <br />vlawmo pond volume acre-ft 0.5425 0.530833333 <br />relative volume inches 2.40553 4.70958E-08 <br />residence time years 0.053014 1.03791 E-09 <br />residence time days 19.350104 3.78839E-07 <br />overflow rate fUyr 54.702547 96347.06682 <br />inflow phos cone ppb 600.03179 600.0317881 <br />outflow phos cone ppb 251.57925 600.0317182 <br />p reaction rate 3.3034538 1.162E-07 <br />1-rp 0.4192765 0.999999884 <br /> <br />