Table 12. Hydraulic variables simulated by the HEC-RAS model for Charles River at Medway, 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   8 .20 787 .99   -- 787 .62 0 .000835 0 .57 14 .35 44 .7
100   10 .50 788 .04   -- 787 .66   .000905   .63 16 .63 47 .4
100   12 .60 788 .09   -- 787 .70   .001013   .67 18 .92 54 .1
100   14 .20 788 .11   -- 787 .72   .001025   .70 20 .27 54 .2
100   19 .10 788 .17   -- 787 .78   .001135   .81 23 .53 54 .4
100   76 .20 788 .54   -- 788 .12   .002378 1 .74 43 .72 55 .6
100

170 .00 788 .92   -- 788 .40   .003259 2 .59 65 .64 58 .8
374 .2 8 .20 788 .19   --   --   .000639   .64 12 .73 27 .3
374 .2 10 .50 788 .26   --   --   .000704   .72 14 .61 28 .6
374 .2 12 .60 788 .31   --   --   .000714   .78 16 .20 31 .1
374 .2 14 .20 788 .34   --   --   .000732   .83 17 .09 32 .2
374 .2 19 .10 788 .42   --   --   .000691   .98 19 .56 33 .3
374 .2 76 .20 788 .93   --   --   .000987 1 .97 38 .61 39 .7
374 .2

 170 .00 789 .52   --   --   .001585 2 .72 62 .50 41 .3
580 .9 8 .20 788 .25 788 .27   --   .000147   .30 27 .65 61 .4
580 .9 10 .50 788 .32 788 .31   --   .000140   .33 31 .79 64 .8
580 .9 12 .60 788 .37 788 .31   --   .000126   .36 35 .15 67 .0
580 .9 14 .20 788 .40   --   --   .000125   .38 37 .03 68 .3
580 .9 19 .10 788 .47 788 .39   --   .000110   .45 42 .51 71 .7
580 .9 76 .20 789 .18 789 .24   --   .000864   .71 107 .41 100 .3
580 .9

 170 .00 789 .83   --   --   .000671   .98 172 .82 101 .0
641 .1 8 .20 788 .27 788 .49   -- 1 .006706 1 .44 5 .71 16 .7
641 .1 10 .50 788 .33 788 .47   -- 1 .019691 1 .56 6 .74 17 .6
641 .1 12 .60 788 .37 788 .47   -- 1 .077331 1 .67 7 .54 18 .4
641 .1 14 .20 788 .39 788 .41   -- 1 .195012 1 .78 7 .98 19 .2
641 .1 19 .10 788 .46 788 .62   -- 1 .743136 2 .02 9 .47 25 .2
641 .1 76 .20 789 .29 789 .28   --   .009097 1 .40 54 .49 66 .5
641 .1

 170 .00 789 .88   --   --   .002477 1 .80 94 .28 68 .7
691 .6 8 .20 788 .90 788 .84 788 .67   .003210   .67 12 .33 54 .4
691 .6 10 .50 788 .94 788 .92 788 .70   .003068   .71 14 .81 54 .8
691 .6 12 .60 788 .98 788 .94 788 .71   .002961   .74 17 .00 55 .2
691 .6 14 .20 789 .01 788 .92 788 .75   .002965   .78 18 .24 55 .4
691 .6 19 .10 789 .05 789 .00 788 .81   .002780   .93 20 .55 55 .7
691 .6 76 .20 789 .47   --   --   .002122 1 .69 45 .14 58 .6
691 .6

 170 .00 790 .02   --   --   .003992 2 .19 77 .70 61 .4
1,284   8 .20 789 .52   -- 789 .04   .000506   .36 22 .65 43 .1
1,284   10 .50 789 .59   -- 789 .06   .000549   .41 25 .92 44 .3
1,284   12 .60 789 .65   -- 789 .08   .000589   .44 28 .56 45 .3
1,284   14 .20 789 .70   -- 789 .10   .000605   .46 30 .62 46 .0
1,284   19 .10 789 .81   -- 789 .14 0 .000715 0 .53 35 .86 49 .6
1,284   76 .20 790 .48 790 .48   --   .001330 1 .06 72 .16 56 .7
1,284

170 .00 791 .31   --   --   .001296 1 .43 119 .29 57 .5
1,466 .3 8 .20 790 .11 790 .26 790 .11   .034457 2 .15 3 .81 21 .8
1,466 .3 10 .50 790 .13 790 .33 790 .13   .041208 2 .49 4 .21 22 .1
1,466 .3 12 .60 790 .15 790 .40 790 .15   .040078 2 .64 4 .77 22 .5
1,466 .3 14 .20 790 .17 790 .35 790 .17   .038389 2 .72 5 .23 22 .8
1,466 .3 19 .10 790 .23   -- 790 .23   .036699 2 .96 6 .45 23 .9
1,466 .3 76 .20 791 .01 791 .05   --   .013620 2 .13 35 .84 44 .8
1,466 .3

 170 .00 791 .74   --   --   .007729 2 .45 70 .20 49 .2
1,481 .8 8 .20 790 .50 790 .50   --   .014794 1 .05 7 .83 30 .2
1,481 .8 10 .50 790 .54 790 .54   --   .012955 1 .16 9 .08 31 .0
1,481 .8 12 .60 790 .57 790 .70   --   .012561 1 .27 9 .96 32 .1
1,481 .8 14 .20 790 .59 790 .56   --   .012090 1 .34 10 .62 33 .0
1,481 .8 19 .10 790 .63   --   --   .011709 1 .56 12 .23 34 .9
1,481 .8 76 .20 791 .15 791 .19   --   .007573 2 .29 33 .26 45 .3
1,481 .8

 170 .00 791 .83   --   --   .005041 2 .58 67 .15 53 .3
1,498 .9 8 .20 790 .76 790 .76 790 .53   .014895   .76 10 .81 34 .3
1,498 .9 10 .50 790 .78 790 .76 790 .56   .013998   .92 11 .40 34 .8
1,498 .9 12 .60 790 .79 790 .84 790 .58   .012720 1 .06 11 .83 35 .1
1,498 .9 14 .20 790 .80 790 .80 790 .61   .011771 1 .17 12 .10 35 .3
1,498 .9 19 .10 790 .84   -- 790 .65   .011451 1 .38 13 .80 36 .5
1,498 .9 76 .20 791 .33 791 .38 790 .99   .014464 2 .18 35 .15 51 .1
1,498 .9 170 .00 791 .93   -- 791 .34   .009299 2 .54 68 .47 57 .9
River
station 		Discharge
(ft3/s) 		Froude
No. 		Manning’s
coefficient 		Average
depth
(ft) 		Hydraulic
radius
(ft) 		Total
wetted
perimeter
(ft) 		Notes
100   8 .20 0 .18 0 .035 0 .32 0 .32 45 .18 Measured discharge
100   10 .50   .19   .035   .35   .35 47 .85 Measured discharge
100   12 .60   .20   .035   .35   .35 54 .67 Measured discharge
100   14 .20   .20   .035   .37   .37 54 .77 Measured discharge
100   19 .10   .22   .035   .43   .43 55 .00 Measured discharge
100   76 .20   .35   .035   .79   .77 56 .60 Measured discharge
100   170 .00   .43   .035 1 .12 1 .10 59 .91 Estimated bankfull
                              discharge
374 .2 8 .20   .17   .035   .47   .47 27 .37 Measured discharge
374 .2 10 .50   .18   .035   .51   .51 28 .67 Measured discharge
374 .2 12 .60   .19   .033   .52   .52 31 .21 Measured discharge
374 .2 14 .20 0 .20 0 .032 0 .53 0 .53 32 .32 Measured discharge
374 .2 19 .10   .22   .028   .59   .59 33 .38 Measured discharge
374 .2 76 .20   .35   .023   .97   .96 40 .03 Measured discharge
374 .2 170 .00   .39   .028 1 .51 1 .48 42 .15 Estimated bankfull
                              discharge
580 .9 8 .20   .08   .035   .45 0 .44 63 .21 Measured discharge
580 .9 10 .50   .08   .032   .49   .48 66 .73 Measured discharge
580 .9 12 .60   .09   .030   .52   .51 69 .03 Measured discharge
580 .9 14 .20   .09   .028   .54   .53 70 .28 Measured discharge
580 .9 19 .10   .10   .024   .59   .58 73 .82 Measured discharge
580 .9 76 .20   .12   .063 1 .07 1 .04 103 .27 Measured discharge
580 .9 170 .00   .13   .055 1 .71 1 .65 104 .79 Estimated bankfull
                              discharge
641 .1 8 .20   .43   .500   .34   .33 17 .09 Measured discharge
641 .1 10 .50   .44   .500   .38   .37 18 .04 Measured discharge
641 .1 12 .60   .46   .500   .41   .40 18 .88 Measured discharge
641 .1 14 .20   .49   .500   .41   .41 19 .68 Measured discharge
641 .1 19 .10   .58   .500   .38   .37 25 .68 Measured discharge
641 .1 76 .20   .27   .088   .82   .81 67 .54 Measured discharge
641 .1 170 .00   .27   .050 1 .37 1 .35 70 .03 Estimated bankfull
                              discharge
691 .6 8 .20   .25   .047   .22   .22 54 .84 Measured discharge
691 .6 10 .50   .25   .048   .27   .26 55 .26 Measured discharge
691 .6 12 .60   .24   .049   .30   .30 55 .64 Measured discharge
691 .6 14 .20   .24   .050   .33   .32 55 .90 Measured discharge
691 .6 19 .10   .27   .043   .37   .36 56 .32 Measured discharge
691 .6 76 .20   .34   .034   .77   .76 59 .51 Measured discharge
691 .6 170 .00   .34   .050 1 .27 1 .24 62 .47 Estimated bankfull
                              discharge
1,284   8 .20   .09   .060   .53   .52 43 .25 Measured discharge
1,284   10 .50   .09   .060   .58   .58 44 .45 Measured discharge
1,284   12 .60   .10   .060   .63   .63 45 .39 Measured discharge
1,284   14 .20   .10   .060   .67   .66 46 .12 Measured discharge
1,284   19 .10   .11   .060   .72   .72 49 .72 Measured discharge
1,284   76 .20   .17   .060 1 .27 1 .26 57 .07 Measured discharge
1,284   170 .00   .17   .060 2 .07 2 .02 59 .04 Estimated bankfull
                              discharge
1,466 .3 8 .20   .91   .040   .17   .17 21 .84 Measured discharge
1,466 .3 10 .50 1 .01   .040   .19   .19 22 .15 Measured discharge
1,466 .3 12 .60 1 .01   .040   .21   .21 22 .56 Measured discharge
1,466 .3 14 .20 1 .00   .040   .23   .23 22 .91 Measured discharge
1,466 .3 19 .10 1 .01 0 .040 0 .27 0 .27 24 .01 Measured discharge
1,466 .3 76 .20   .42   .070   .80   .80 45 .07 Measured discharge
1,466 .3 170 .00   .35   .070 1 .43 1 .41 49 .82 Estimated bankfull
                              discharge
1,481 .8 8 .20   .36   .070   .26   .26 30 .31 Measured discharge
1,481 .8 10 .50   .38   .064   .29   .29 31 .07 Measured discharge
1,481 .8 12 .60   .40   .060   .31   .31 32 .17 Measured discharge
1,481 .8 14 .20   .42   .057   .32   .32 33 .13 Measured discharge
1,481 .8 19 .10   .46   .051   .35   .35 35 .01 Measured discharge
1,481 .8 76 .20   .47   .046   .73   .73 45 .43 Measured discharge
1,481 .8 170 .00   .39   .050 1 .26 1 .25 53 .64 Estimated bankfull
                              discharge
1,498 .9 8 .20   .24   .110   .32   .31 34 .85 Measured discharge
1,498 .9 10 .50   .28   .090   .33   .32 35 .31 Measured discharge
1,498 .9 12 .60   .32   .075   .34   .33 35 .65 Measured discharge
1,498 .9 14 .20   .35   .067   .34   .34 35 .85 Measured discharge
1,498 .9 19 .10   .40   .059   .38   .37 37 .14 Measured discharge
1,498 .9 76 .20   .45   .065   .69   .67 52 .13 Measured discharge
1,498 .9 170 .00   .40   .065 1 .18 1 .15 59 .31 Estimated bankfull
  discharge