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, � <br /> �u�Y i, isea D R Al NA G E M A N UA L FIG. A b B 5-294.222 f <br /> . �--i 200 \ � �o.eo o.00i <br /> -- �000 ' � N � <br /> ��' �. a�o �• f. �,�'� � <br /> � ._ 60o fi =- , �.�°.�° 0.002 <br /> 4� � � <br /> � .QO - � �3G �. �' � �030 0.003 <br /> �- 300 �'� <br /> � ��Z� � 0.004 <br /> �� �u 20 0.005 <br /> - 20 0 � — -= , <br /> � -� — � <br /> i � �� <br /> ` <br /> ,/� �� \ --�� � c' �, '" <br /> � ;' _ <br /> 0.01 : \ ( <br /> � �� �_- 6 0.10 �; <br /> 5 `� <br /> �, a� � . 4 a 0.02 <br /> � 50 ;� � 3 � `�'� � ! <br /> '�' 40 c,L '^' ao �A5 �., -0.03 <br /> .� Example: ,� � � <br /> � 30 L= 100 ft. � , � 2 � •� 0.04 <br /> °' n = 0. 40 E, F,-- � � _0.05 <br /> � - 20 S _ 1% I o <br /> Read t = 13. 6 min. � <br /> 12 0.7 '�0.02 0.1 � <br /> �n�. 9.� �~�� � ` <br /> FIG. A 5-294 0222 k,"�� <br /> Time of concentration for overland flow .� �' <br /> ,R:� ._ ` � ���, �..�� <br /> ,�' . Q� � <br /> 8 <br /> � <br /> DURA'fiON OR TIME IN HOURS � <br /> �, � � 2 3 4 � 67 <br /> 0 5 � - - - . � � <br /> *�', 4� ----�--- � � ' __,�\ <br /> � 3� SO �P�` <br /> n�, ��� 2J^�'der� � <br /> � 2 3 �' O��� <br /> 'yPdrs � <br /> � <br /> .� <br /> .�, <br /> m <br /> � I. <br /> a� <br /> � <br /> � <br /> �., <br /> .-, For Duluth and the area northeast <br /> � <br /> � 0� of a line from Duluth to the north- <br /> .., west corner of the state use 0, 85 <br /> a0•4 of curve values. Use curve values <br /> 0.3 elsewhere. <br /> - I 5 10 20 30 40 50 100 200 �00 600 , <br /> Duration of Rainfall or Time of Concentration <br /> v FIG. B 5-2940222 1 <br /> ��" Rainfall intensity - duration frequency <br /> j= S�o�c x � �s i a�-�-��' curves for �se with rational formula, <br /> i = �so � <br />