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<br />, <br /> <br />.: <br /> <br />e <br /> <br />e <br /> <br />e <br /> <br />M(',"1"74 <br />'J ..' ' "0 ' <br />d <br />L""" <br />\,0 <br />rO~ <br />river ~ If the plant consumed portion of the precipitation is kept in the reselVoir and the <br />evaporation pan is at the reservoir site, the following equation applies: <br /> <br />Adjusted Gross Evaporation = Net Evaporation + Precipitation - (03 x Precipitation) <br /> <br />{\.~ <br />0' <br />f' <br /> <br />Adjusted Net Pan Evaporation = Gross Pan Evaporation - Precipitation <br />+ (0.3 x Precipitation) <br /> <br />Adjusted Net ReselVoirtvaporation = [(0.7 x Hook Reading) + (0.3 x Precipitation)] <br />x ReselVoir Area <br /> <br />.$ <br />v' <br />,a,r"\.t-s. <br />.'"\ ,.' ~ <br />L/- <\0- <br />-<" <br /> <br />If the plant consumed portion of the precipitation is kept in the reselVoir and the evaporation <br />pan is Ililt at the reservoir site, the following equation applies: <br /> <br />Adjusted Net ReselVoir Evaporation = [(0.7 x (Hook Reading + Precipitation at the evaporation <br />pan site)) + (0,3 x Precipitation at the evaporation pan site)] -[ Precipitation at the ReselVoir site <br />+ (0.3 x Precipitation at the ReselVoir site)] x ReselVoir Area <br /> <br />The reselVoir water volume balance equation for the Accounting Hydrology is: <br /> <br />Change in storage = Inflow - Release - Adjusted Net ReselVoir Evaporation <br /> <br />Computed Inflow = Change in Storage + Release + Adjusted Net ReselVoir Evaporation <br /> <br />Example: <br /> <br />Change in Storage = 100 a.f. <br />ReselVoir Release = 200 a,f. <br />Hook Reading = 2 inches <br />Precipitation = I inch <br />ReselVoir Surface Area = 500 acres <br /> <br />Computed Inflow <br /> <br />= 100 + 200 + [((0,7 x 2) + (0.3 x I)) x 1112 x 500] <br />= 370.83 a.f. <br /> <br />The difference the evaporation and computed inflow for the physical hydrology and the <br />accounting hydrology in the example above is: <br /> <br />Evaporation Difference <br /> <br />= Accounting Evaporation - Physical Evaporation <br />= 70.83 - 58.33 = 12.5 a,f. <br /> <br />Computed Inflow Difference = Accounting Compo Inr. - Physical Comp. Inf. <br />= 370.83 - 358.33 = 12.5 a.f. <br /> <br />~ 7c/;Jo ~~ .:. ti<- ~'h.....sLL <br />;;YEO ~ O-U<~ ~ <4D-- ='(j'/o. ~ <br /> <br />J No uo...f c.k~ '" L... ~ ~ <br /> <br />~ <br />