﻿HYDROLOGY 
  OF 
  NEW 
  YORK 
  477 
  

  

  The 
  foregoing 
  flood 
  elevations 
  have 
  been 
  deduced 
  from 
  current- 
  

   meter 
  measurements 
  and, 
  as 
  there 
  is 
  no 
  very 
  satisfactory 
  place 
  

   for 
  making 
  such 
  measurements 
  at 
  Utica, 
  are 
  subject 
  to 
  consider- 
  

   able 
  error. 
  The 
  catchment 
  area 
  at 
  Utica 
  is 
  500 
  square 
  miles. 
  

  

  In 
  the 
  spring 
  of 
  1888, 
  the 
  Mohawk 
  at 
  Ridge 
  Mills 
  gave 
  a 
  flow 
  

   of 
  7030 
  cubic 
  feet 
  per 
  second 
  (catchment, 
  153 
  square 
  miles), 
  or 
  at 
  

   the 
  rate 
  of 
  46 
  cubic 
  feet 
  per 
  second 
  per 
  square 
  mile. 
  On 
  March 
  

   12, 
  1898, 
  the 
  flow 
  at 
  the 
  same 
  point 
  was 
  5266 
  cubic 
  feet 
  per 
  second, 
  

   or 
  at 
  the 
  rate 
  of 
  35 
  cubic 
  feet 
  per 
  second 
  per 
  square 
  mile. 
  

  

  In 
  the 
  foregoing 
  at 
  Ridge 
  Mills 
  and 
  Little 
  Falls 
  the 
  data 
  have 
  

   been 
  computed 
  in 
  accordance 
  with 
  the 
  Cornell 
  University 
  coeffi- 
  

   cients. 
  The 
  ratio 
  of 
  the 
  catchment 
  area 
  at 
  Little 
  Falls 
  to 
  that 
  of 
  

   Ridge 
  Mills 
  is 
  8.56. 
  If 
  we 
  assume 
  the 
  flow 
  of 
  the 
  several 
  tributary 
  

   streams 
  above 
  Little 
  Falls 
  to 
  have 
  been 
  the 
  same 
  as 
  that 
  of 
  the 
  

   main 
  Mohawk 
  river 
  above 
  Ridge 
  Mills, 
  the 
  maximum 
  discharge 
  of 
  

   the 
  entire 
  catchment 
  area 
  is 
  found 
  by 
  multiplying 
  5266, 
  the 
  flow 
  

   in 
  cubic 
  feet 
  per 
  second 
  at 
  Ridge 
  Mills 
  on 
  March 
  12, 
  1898, 
  by 
  8.56, 
  

   the 
  ratio 
  of 
  the 
  catchment 
  areas. 
  This 
  gives 
  a 
  maximum 
  inflow 
  

   into 
  the 
  Mohawk 
  river 
  above 
  Little 
  Falls 
  of 
  about 
  45,000 
  cubic 
  

   feet 
  per 
  second. 
  Probably, 
  however, 
  this 
  assumption 
  is 
  too 
  large 
  

   for 
  the 
  special 
  case 
  under 
  consideration, 
  as 
  the 
  flow 
  of 
  Oriskany 
  

   creek 
  at 
  Oriskany 
  on 
  March 
  12, 
  1898, 
  was 
  only 
  600 
  cubic 
  feet 
  per 
  

   second, 
  or 
  4.1 
  cubic 
  feet 
  per 
  second 
  per 
  square 
  mile. 
  

  

  If, 
  however, 
  we 
  assume 
  that 
  at 
  some 
  time 
  the 
  total 
  flow 
  from 
  

   the 
  tributary 
  streams 
  above 
  Little 
  Falls 
  will 
  approximate 
  about 
  

   35 
  cubic 
  feet 
  per 
  second 
  per 
  square 
  mile, 
  it 
  follows 
  that 
  we 
  may 
  

   expect 
  an 
  inflow 
  into 
  the 
  valley 
  above 
  Little 
  Falls 
  of 
  certainly 
  

   45,000 
  cubic 
  feet 
  per 
  second, 
  although 
  probably 
  in 
  March, 
  1898, 
  it 
  

   did 
  not 
  reach 
  that 
  figure. 
  As 
  to 
  why 
  such 
  a 
  flow 
  is 
  possible, 
  we 
  

   may 
  consider 
  (1) 
  that 
  tributary 
  streams 
  all 
  have 
  a 
  rapid 
  descent 
  

   from 
  the 
  adjacent 
  high 
  ground, 
  and 
  (2) 
  the 
  large 
  temporary 
  stor- 
  

   age 
  of 
  the 
  flats 
  above 
  Little 
  Falls. 
  

  

  By 
  way 
  of 
  showing 
  the 
  character 
  of 
  the 
  inflowing 
  streams 
  the 
  

   following 
  data 
  relative 
  to 
  the 
  descent 
  of 
  a 
  number 
  of 
  the 
  more 
  

   important 
  ones 
  are 
  cited. 
  In 
  the 
  following 
  tabulation 
  we 
  have 
  

   the 
  name 
  of 
  the 
  tributary, 
  distance 
  from 
  headwaters 
  to 
  mouth, 
  

   and 
  elevation 
  of 
  the 
  headwaters, 
  the 
  elevation 
  being 
  taken 
  not 
  at 
  

  

  