﻿HYDROLOGY 
  OF 
  NEW 
  YORK 
  

  

  463 
  

  

  1 
  or 
  2 
  as 
  giving 
  more 
  nearly 
  the 
  actual 
  flows, 
  and 
  accordingly 
  

   the 
  flows 
  have 
  been 
  computed 
  by 
  the 
  use 
  of 
  the 
  isaid 
  coefficients. 
  

   By 
  way 
  of 
  showing 
  the 
  relation 
  between 
  the 
  flows 
  as 
  per 
  Francis's 
  

   formula 
  and 
  by 
  Cornell 
  experiments 
  Nos. 
  1 
  and 
  2, 
  the 
  following 
  

   tabulation 
  is 
  submitted, 
  the 
  last 
  column 
  giving 
  the 
  difference 
  

   between 
  Francis's 
  formula 
  and 
  the 
  mean 
  of 
  experiments 
  Nos. 
  1 
  

   and 
  2 
  as 
  a. 
  per 
  cent 
  of 
  the 
  flow 
  by 
  Francis's 
  formula 
  : 
  

  

  

  Cubic 
  feet 
  per 
  second 
  

   per 
  foot 
  of 
  crest 
  

  

  Difference 
  

  

  of 
  columns 
  

  

  (2) 
  and 
  (3) 
  

  

  Difference 
  

   as 
  a 
  per 
  cent 
  

  

  Head 
  on 
  Crest 
  

   Feet 
  

  

  Cornell 
  

   experiments 
  

   Nos. 
  1 
  and 
  2 
  

  

  Francis's 
  

   formula 
  

  

  of 
  flow 
  by 
  

   Francis's 
  

   formula 
  

  

  (1) 
  

  

  (2) 
  

  

  (8) 
  

  

  (4) 
  

  

  (5) 
  

  

  0.5 
  

  

  *1.17 
  

  

  *3.44 
  

   *6.59 
  

   10.50 
  

   14.59 
  

   19.12 
  

   24.20 
  

   29.66 
  

   35.40 
  

   41.46 
  

  

  1.18 
  

  

  3.33 
  

  

  6.12 
  

  

  9.42 
  

  

  13.16 
  

  

  17.30 
  

  

  21.90 
  

  

  26.64 
  

  

  31.78 
  

  

  37.20 
  

  

  0.01 
  

   *0.11 
  

  

  0.47 
  

   1.08 
  

   1.43 
  

   1.82 
  

   2.30 
  

   3.02 
  

   3.62 
  

   4.26 
  

  

  0.8 
  

  

  1.0 
  

  

  3.3 
  

  

  1.5 
  

  

  7.7 
  

  

  2.0 
  

  

  10.4 
  

  

  2.5 
  

  

  3.0 
  

  

  10.8 
  

   10.5 
  

  

  3.5 
  

  

  10.5 
  

  

  4.0 
  

  

  11.3 
  

  

  4 
  5 
  

  

  11 
  4 
  

  

  o.O 
  

  

  11.5 
  

  

  

  

  Mean 
  taken 
  

  

  In 
  passing, 
  it 
  may 
  be 
  remarked 
  that 
  the 
  flood-flows 
  of 
  Black 
  

   river 
  have 
  been 
  computed 
  by 
  either 
  Bazin's 
  coefficients 
  or 
  by 
  the 
  

   coefficients 
  deduced 
  from 
  the 
  Cornell 
  University 
  experiments. 
  

  

  In 
  its 
  course 
  from 
  the 
  headwaters 
  in 
  Hamilton 
  county 
  to 
  Lake 
  

   Ontario 
  at 
  Dexter, 
  Black 
  river 
  has 
  topographically 
  three 
  distinct 
  

   subdivisions: 
  (1) 
  The 
  upper 
  valley 
  above 
  Lyon 
  Falls; 
  (2) 
  the 
  mid- 
  

   dle 
  valley 
  stretch 
  from 
  Lyon 
  Falls 
  to 
  Carthage, 
  and 
  (3) 
  the 
  lower 
  

   valley 
  with 
  rapid 
  fall 
  from 
  Carthage 
  to 
  Black 
  river 
  bay. 
  The 
  

   second 
  division, 
  from 
  Lyon 
  Falls 
  to 
  Carthage, 
  is 
  a 
  broad, 
  flat 
  

   valley. 
  

  

  The 
  catchment 
  area 
  of 
  the 
  whole 
  river 
  above 
  Dexter 
  is 
  1930 
  

   square 
  miles; 
  above 
  Carthage, 
  1812 
  square 
  miles, 
  and 
  above 
  the 
  

   mouth 
  of 
  Moose 
  river, 
  463 
  square 
  miles. 
  The 
  following 
  are 
  the 
  

   areas 
  of 
  the 
  principal 
  tributaries: 
  Deer 
  river 
  at 
  mouth, 
  102 
  

   square 
  miles; 
  Beaver 
  river 
  at 
  mouth, 
  337.5 
  square 
  miles; 
  Moose 
  

  

  