Table 11. Hydraulic variables simulated by the HEC-RAS model for Mine Brook near Franklin, Massachusetts

[River station: River station numbers increase in an upstream direction. ft 3/s, cubic foot per second; ft, foot; ft/ft, foot per foot; ft 2, square foot; ft/s, foot per second; --, no data]
River
station 		Discharge
(ft3/s) 		Calculated
water-
surface
altitude (ft) 		Observed
water-
surface
altitude
(ft) 		Critical
water-
surface
altitude
(ft) 		Energy
grade
slope
(ft/ft) 		Average
velocity
(ft/s) 		Flow area
(ft2) 		Top width (ft)
100   2 .03 495 .89 495 .89 495 .66 0 .015712 0 .48 4 .24 17 .2
100   2 .30 495 .91 495 .95 495 .67   .015704   .50 4 .60 17 .6
100

   50 .00 496 .89   -- 496 .28   .015691 1 .98 25 .34 24 .2
112 .91 2 .03 496 .02 496 .00   --   .006675   .53 3 .87 17 .2
112 .91 2 .30 496 .04 496 .05   --   .006611   .55 4 .20 17 .6
112

 .91 50 .00 496 .98   --   --   .004312 1 .96 25 .56 25 .1
123 .60 2 .03 496 .13   --   --   .019559   .62 3 .27 13 .6
123 .60 2 .30 496 .15 496 .14   --   .020427   .65 3 .54 14 .3
123

 .60 50 .00 497 .05   --   --   .035843 2 .67 18 .73 18 .1
143 .62 2 .03 496 .27 496 .23   --   .003305   .48 4 .19 13 .6
143 .62 2 .30 496 .29 496 .28   --   .003388   .51 4 .51 13 .9
143

 .62 50 .00 497 .44   --   --   .010102 2 .14 23 .34 18 .6
164 .85 2 .03 496 .34 496 .30   --   .003078   .54 3 .76 12 .1
164 .85 2 .30 496 .36 496 .32   --   .003094   .57 4 .07 12 .4
164

 .85 50 .00 497 .50   --   --   .001836 2 .43 20 .58 15 .5
173 .65 2 .03 496 .40 496 .45   --   .082208 1 .23 1 .65 9 .1
173 .65 2 .30 496 .42 496 .48   --   .073214 1 .22 1 .89 9 .7
173

 .65 50 .00 497 .52   --   --   .016101 2 .78 18 .01 15 .8
187 .25 2 .03 496 .99 496 .97 496 .77   .025222   .50 4 .04 17 .6
187 .25 2 .30 497 .00 497 .05 496 .79   .026171   .54 4 .29 17 .9
187 .25 50 .00 497 .73   --   --   .014422 2 .71 18 .46 20 .6
River
station 		Discharge
(ft3/s) 		Froude
No. 		Manning’s
coefficient 		Average
depth
(ft) 		Hydraulic
radius
(ft) 		Total
wetted
perimeter
(ft) 		Notes
100   2 .03 0 .17 0 .150 0 .25 0 .24 17 .70 Measured discharge
100   2 .30   .17   .149   .26   .25 18 .11 Measured discharge
100   50 .00   .33   .096   1.05   .97 26 .19 Estimated bankfull
                              discharge
112 .91 2 .03   .20   .085   .22   .22 17 .25 Measured discharge
112 .91 2 .30   .20   .085   .24   .24 17 .68 Measured discharge
112 .91 50 .00   .34   .051 1 .02 1 .00 25 .54 Estimated bankfull
                              discharge
123 .60 2 .03   .22   .129   .24   .24 13 .69 Measured discharge
123 .60 2 .30   .23   .129   .25   .25 14 .38 Measured discharge
123 .60 50 .00   .46   .104 1 .03   .98 19 .14 Estimated bankfull
                              discharge
143 .62 2 .03   .15   .080   .31   .31 13 .69 Measured discharge
143 .62 2 .30   .16   .080   .33   .32 13 .96 Measured discharge
143 .62 50 .00   .33   .080 1 .26 1 .20 19 .46 Estimated bankfull
                              discharge
164 .85 2 .03   .17   .069   .31   .30 12 .46 Measured discharge
164 .85 2 .30   .17   .068   .33   .32 12 .82 Measured discharge
164 .85 50 .00   .37   .030 1 .33 1 .20 17 .21 Estimated bankfull
                              discharge
173 .65 2 .03   .51   .110   .18   .18 9 .28 Measured discharge
173 .65 2 .30   .49   .109   .19   .19 9 .91 Measured discharge
173 .65 50 .00   .46   .070 1 .14 1 .04 17 .35 Estimated bankfull
                              discharge
187 .25 2 .03   .19   .174   .23   .23 17 .92 Measured discharge
187 .25 2 .30   .19   .172   .24   .24 18 .14 Measured discharge
187 .25 50 .00   .50   .060   .90   .86 21 .42 Estimated bankfull
                              discharge