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23� <br /> 1 <br /> — 1 . <br /> Workaheet 4: Graphical Peak Diecharge method <br /> Pro�ect LAY.6S ��a1�1�W�n APTS ay SN/h Dete 1 14 �8 <br /> Locatton G�g��TT , �VA Checked Data <br /> Circle one: Yre�ent Developed EXIS� VPS7R�/. D� <br /> 1. Date: <br /> " Drainage area .......... � <br /> . Q. IS 61Z (acre�/640) <br /> Runoff curve number .... CN ' a9 (Frrnn workaheet 2) <br /> — Time of concentration .. T� ' 1 •OtJ hr (From Workrheet 3) <br /> Rainfall di�trlAution type � �_ �i, TA, II, III) <br /> Pond and swamp areae spread acrea or niZ covared) <br /> Chroughout vaterohed ...... � � . percent oE Am �,_, <br /> ; <br /> Stors 1 Storm 2 Stors <br /> � 1_ yr 2 2=J <br /> f ', � � 2. Frequency ............................... <br />� I c �� .. : t � �p 2.� <br /> t 1 i � -, ,�.., tn <br />, . ,�..,. ' 7. Rainfall, P (24-hour) ................... <br /> ' ' _ <br /> 1n .2A� . 2.4� <br /> � � 4. Inttial ab�traction, Ia ..........••••••• <br /> ( ' _, (U�e CN with table 4-1.) <br /> ` �_. S. Compute Ia/P ............................ <br /> � 154 .092 <br /> . <br /> ' , ' ,_. 2 1 <br />; . . . � . . •�r�������������• C�m�iR � .7 I �� <br /> 6. Unit pnak diechara�, q� <br />' , - " ! ^ (Use T� end Ia/P vith exhibit 4-{A ) <br />, , `,,� _ ............................... in O.�O � .�00 <br /> 7. Runotf, Q <br /> (Prom work�heat 2)• <br /> 8. PoM and swmp adju�tment factor, FP .... <br /> I .OU �•OU <br /> ='�='�:. <br /> .. (U�e percant pond and �wmp area <br /> _yL� . vith uble 4-2. Factor !e 1.0 for <br /> . ,_, ; - <br />. ;; , <br /> zero percent pond and swamp area.) <br />_ � � ........... �c. 9.8 25.1 <br /> 9, Peak diecharge, qP ........... <br /> } � (Where qP ' 9u�aQFP� <br /> — D� (21aVI•TR-66, Second Ed., June 1986) <br />