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2/20/86 stormtp <br />Fuji{:i and Associates <br />2�617 76thi Ave. W. <br />Edmonds, Washingtan 90U20 <br />t206) 77�-19U0 <br />By: MLO <br />Suhject: Evergre=n F'la�a <br />R�l'Eh1SI0N bASIN ('Ir_janainem E< Warren Method) <br />Storm Design Frequency: Storage �^� <br />"l r �IY� <br />Flow LU.uO <br />Tatal Area (ac) _ <br />Area <br />Imperv. 2.67 <br />Landscape U.�O <br />�.87�:C<input <br />C <br />ii . 9i� <br />0. 2U <br />C future = U.BSC<:inpuc ; <br />I:•=termine e.:isting flow rat�1 �5 s��,u/�� <br />Ce = O.1G � � <br />^ ' �( /.. <br />l <br />��E .�JS /'" ��t� .(�° �� <br />i ,� . <br />' �t�� <br />Length ❑f f 7 ow 1 i ne = 500. C��l <br />Slop�= .U�� E::isting envirar�:Forest li <br />From figure 1 Uelocity= U.44 FF'S (� 1 <br />Tt = 18.94 Ti= lii.OU `�,G' <br />Tc= �8.94' N.t L �' <br />I - 1.C�8(figure 2) � � ���C y�i ,,c <br />K s <br />� c�+=�= <br />(2-bypass (cfs)= <br />G allowed(cfs)= <br />�o (cfs> _ <br />o<< << ��� <br />0. tii ,1�'S � M <br />0.07 landscaped areas that are-not r-o1-lectzd <br />U. ^4C«input <br />0.1� Gall/(A�Cfut) <br />Find: Stoi�agn Requirement <br />Where X= -��2S�r.'CRi'� )��%Lt� <br />F'�al: Storage Time (min.) T=-25+((X/Qo)^.5) <br />T = 127.86 <br />� <br />VS <br />v.� �- <br />Ma::imum Starage Volume (cu. ft./ac.) Vs=(Y�rtT)/(T+25)-4U�Qo�-T <br />Y = 36U7.00 � <br />Vs = ?523�6 l' 7' 7! �C� GI lo <br />Total Storage <br />C future= 0.85 <br />Vol. (cf) 6152.1OC� <br />�, < � 5y� . <br />`��a�� �. `�'�����'b <br />`�r�' � �yt � <br />� <br />',�, j �. (� <br />I,,' I �: <br />.� <br />