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0 <br />_u� uu ao_�c. ua.ao r.�.� <br />� �� � Hickman, Wililams & Associates, Inc. <br />;, <br />, � <br />! ,.. Surveyors • Engineers � Planners <br />�-Y Manning's Formula Solation For Open Channel Flow <br />Project Name: <br />Project Number: <br />Date; <br />Drainage: <br />Design Flows ( cfs ): <br />Storm Frequencies ( yoar): <br />Les Schwab-F:verett <br />951207 � <br />22-Feb <br />A South) Gutter <br />p,$2 1.19 1,67 <br />2 10 50 <br />Curb L.cngth: lOD feet <br />Fall: 0,75 feet <br />Type of Surfacing: Asph�lt <br />Curb Height: 0.5 fcct <br />Cross Slope: ( feet/feet ) 0,039 <br />Roughnras Coefficient ( n ): 0.016 <br />l�esign Slopr.: <br />Wetted <br />Dcpth Width <br />0.025 0.641026 <br />0.05 1,282051 <br />0.075 1.923077 <br />0.1 2.564103 <br />0.125 3.205128 <br />Wetted <br />Perimeter <br />0.0075 feet/fect <br />Wetted Hydraulic <br />Area Radins <br />0.67 0.01 0.012 <br />1.33 U.03 0.024 <br />Z,00 0,07 0.036 <br />2.66 G,13 0.048 <br />3.33 0.20 0.060 <br />Flow <br />(cfs) <br />0.00 <br />0.02 <br />0.06 <br />0.14 <br />0.25 <br />Velocily <br />(fps) <br />o.aa <br />0.67 <br />0.88 <br />1.07 <br />].24 <br />Timc <br />(min) <br />�,.�., ,.,�,.�, ••-- <br />0.2 5.1282U5 5.33 0.51 0.096 0.87 1.69 <br />0.225 5.769231 5.99 0.65 0.108 1.19 1.83 <br />0.25 6.410256 6.66 0.80 0.120 1.57 1.9b <br />0.275 7.051282 7.33 0.97 0.132 2.03 2.09 <br />0.3 7.692308 7.99 1.15 0.144 2.56 2�2 <br />5P� iT �l.o�r.l `,:.� ��`t c� 0.4 I c'�'S <br />:. PIACE cl'tTGFF �'�1N e� �I' C)FFSET �'�0'� C,��+C3 <br />3.9 <br />2.5 <br />1.9 <br />1.6 <br />1.3 <br />1.1 <br />1.0 <br />0.9 <br />0.8 <br />0.8 <br />0.8 <br />Histoxal M��I A Auilding � 805 SW Mdustiial Way, Suite 10 � Bsnd, O�egon 97702d093 �(541) 3H9•9351 � FAX (541) 38H•5416 <br />! ;; <br />0 <br />� <br />