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<br />WORKSHEET 3: Time ofCo!!.ce!!.tration (fe) or Travel Time (ft)
<br />
<br />. Project: Cottage Villas Calculated By: CNC
<br />Project No. 92-111 Date: 10-22-92
<br />location: Arden Hills Checked By:
<br />File: TR-55,WR1 Date,
<br />
<br />Drainage Basin:
<br />Developed Condition
<br />
<br />Check One: X_Tc _Tt
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<br />Sheet Row
<br />Seqment #1 I Seqment #2 ' Subtotal I
<br />1 S rf D ,-,' (hi 3 1) La NA -"",.,.,.", 'l
<br />. U ace escn"tlon ta e - ' wn I :,:::,::::::::::::::::,:,'::,1
<br />2, Manninq's Rouqh Coeff.,n (table 3-1) 0,300 NA f:}}}}}}}l
<br />3, Flow Lenqth, L (total <= 300 ft), ft I 100 NA ::::,::::::::::::::::::::::::l
<br />4, Two-year 24-hour Rainfall, P2, in. 2.7 2.7 }}}:<<<<l
<br />5 La d SI::=-: ftIf 00"0 I NA "",',..',','.',-.','.',.,',
<br />. nODe) s, t .. :::::::::::::::::::::::::::::
<br />6, Tt=O,007(nL}AO.8/(p2)AO.5(s)AOA, hr 0,31 I NA 0.31 I
<br />
<br />
<br />Shallow Concentrated Row
<br />. I Seqment #1 I Seqment #2 Subtotal I
<br />7, Surface Description (pavedluncaved) Paved NA }'::::::::::::/::::::::I
<br />8, Flow Lennth, L, It. 300 NA }>>>>>>:::.
<br />9, Watercourse Slope, s, ftIft I 0,01 I NA \:::::::::::::::::::::::::::::1
<br />10, Averaqe Velocity, V (fiq,3-1), ftfs I 2 I NA 1}::::::::::::::::}:::::1
<br />11,Tt-U3600V,hr, I 0.041 NA I 0.041
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<br />
<br />Channel Row
<br />
<br />; Seqment #1 I Seqment #2 i Sublolal i
<br />12, Cross Section Flow Area, a, {ft)e2 I NA i NA (:}::,:::},:>::::j
<br />13 Wetted Pe.imeter Pw ft I NA I ~IA f:::::::::::::::::::::,:':::::l
<br />. 1 I I ..~ .'.....'..,......-..... ......i
<br />14, Hvdraulic Radius, r = alPw, ft I NA i NA (,:::::,::::::\::::;:::':1
<br />15. Channel Slope,s, ftfft I NA I NA U>>>><<::1
<br />16, Mannin,,'s Rouqhness CoefL, n ! NA! NA f<::<<<<<:}
<br />1 7 V 1 49( ')AO -7( )AO "I It! N' , N' ~,_"_""""""""",,,..1
<br />. -. I .b S .::1 n. s I ^ I n ~:::::::::::::::::::::::::::::I
<br />18 Flm" Lencrth L ft : NA I NA ~::':::"':':::-:':':::'::::::
<br />I. 't' .=" t...............'l
<br />119, Tt = U3600 V, hr_ I NA i NA ! NA !
<br />
<br />
<br />Total
<br />
<br />120, Watershed or Subar"" Tc arT\.., Total ! 0,35 i
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<br />TR-55
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<br />8
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