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A ttechment 2.1 <br />tiATIONAL ENGL*IE~ING HANDBOOK <br />..i SECTION 4 <br />HYDROLOGY <br />CHAPTE? 11. ESTIMATION OF DIRF~CT RIINOFF FROM SNOWMFS.T <br />//-/ <br />='~as chapter gives c^thods for estimating enovmelt runoff volumes for <br />flood damage evaluations. Methods of snovmelt forecasting, for <br />irrigation a~ aimiler purposes, are described in the Snov Stu~vey <br />Handbook of the Service. <br />retails of the thermodynamics of.snovmelt are omitted from this chanter <br />cecausa of their limited value in the methods presented here. Some <br />st~_ dax~ references are: <br />r _-=, r.~,.79 D. - Snov-melting characteristics. <br />?ecn_calaLUletin 231, August 1931. Utah Agricultural <br />=xperi=ent Station, Logan, Utah.. <br />__-^t ?~ill'_o - :.na.iysis of high rates of snowmeiting. <br />s.es:yj-2Gj, Transactions of the American ~:aopgysicai <br />"_'_5cn. ~. :. :'"n outline of the thermogynamics of snowmeic. <br />_'e5 _,''.<-1Ci, Tr°^aflCL10IIa Gf the .+mericaII Uwp~yeica:~ <br />Can~S .~.l QgL3CZ :185 =_. J5= ara LJ~__t~j o-a9Lar ~L: 30811 '~atarsnBQ9 <br />~='•:= than fcr '_arge OIIe9. ^~1^.C9 snovicelt rsies are relatively 1ov ~ csa <br />there c"ay to f'_ccc_r., c : 15rge watersheds when ;t.-eems o., a=ai_ ".ater- <br />.. sheds are ~o.~ing less than hsnks`r'-'_. <br />_ The hydroic;ist eccu~i:tea .nth en zrea will :mow "_e raiative <br />importance of snow~melt es a source of f'-ooding is that are. :.. <br />doubttll ceses the data ro^-.~.11p ~ats'"ered by !ntarviev far an ::.'storical <br />flood 5er±es will ususll; dafine the charactor of f'_ood f'_owe. In <br />r other !=star:cee, the r: Wolf -ecoxds will show how L-portsnt snovaelt <br />flooding !_. Tt is selcoa : ecessary t. -eve Cetailsd h,-vralogic <br />investibat!c.s intc =.._ =^ttor. <br />J1'r <br />Y.M . . <br /> <br /> <br />