﻿HYDROLOGY 
  OF 
  NEW 
  YORK 
  491 
  

  

  On 
  the 
  Allegheny, 
  Susquehanna 
  and 
  Delaware 
  rivers 
  and 
  their 
  

   tributaries 
  floods 
  may 
  rise 
  to 
  50 
  to 
  60 
  cubic 
  feet 
  per 
  second 
  per 
  

   square 
  mile, 
  and 
  on 
  torrential 
  streams 
  generally, 
  throughout 
  the 
  

   State, 
  they 
  may 
  at 
  times 
  be 
  from 
  80 
  to 
  100 
  cubic 
  feet 
  per 
  second 
  

   per 
  square 
  mile. 
  In 
  a 
  few 
  cases 
  on 
  streams 
  of 
  small 
  catchment 
  

   areas 
  they 
  may 
  rise 
  to 
  125 
  cubic 
  feet 
  per 
  second 
  per 
  square 
  mile. 
  

   The 
  latter 
  flows, 
  however, 
  are 
  net 
  very 
  common. 
  

  

  Miniftium 
  Flow 
  of 
  Streams 
  .in 
  New 
  York 
  

  

  Whatever 
  the 
  purpose 
  for 
  which 
  an 
  inland 
  stream 
  is 
  to 
  be 
  

   utilized, 
  the 
  first 
  question 
  asked 
  is 
  with 
  regard 
  to 
  the 
  minimum 
  

   flow. 
  If 
  for 
  power 
  development, 
  the 
  minimum 
  flow 
  will 
  determine 
  

   the 
  amount 
  of 
  power 
  which 
  can 
  be 
  insured 
  on 
  a 
  given 
  head 
  ; 
  if 
  for 
  

   the 
  water 
  supply 
  of 
  a 
  town, 
  the 
  minimum 
  flow 
  will 
  indicate 
  at 
  

   once 
  the 
  number 
  of 
  people 
  which 
  may 
  be 
  supplied 
  without 
  storage. 
  

   From 
  every 
  point 
  of 
  view, 
  therefore, 
  a 
  knowledge 
  of 
  minimum 
  flow 
  

   is 
  a 
  matter 
  of 
  the 
  first 
  importance. 
  Below 
  are 
  given 
  the 
  minimum 
  

   flows 
  of 
  the 
  inland 
  streams 
  of 
  the 
  State 
  of 
  New 
  York, 
  so 
  far 
  as 
  

   information 
  is 
  at 
  hand. 
  

  

  Minimum 
  flow 
  of 
  Niagara 
  river. 
  According 
  to 
  table 
  No. 
  45, 
  the 
  

   minimum 
  discharge 
  of 
  Niagara 
  river 
  was 
  in 
  November, 
  1895, 
  when 
  

   the 
  flow 
  for 
  the 
  entire 
  month 
  averaged 
  only 
  177,852 
  cubic 
  feet 
  per 
  

   second 
  (catchment 
  above 
  Niagara 
  Falls, 
  265,100 
  square 
  miles), 
  or 
  

   the 
  flow 
  was 
  at 
  the 
  rate 
  of 
  0.67 
  cubic 
  foot 
  per 
  second 
  per 
  square 
  

   mile. 
  

  

  Minimum 
  flow 
  of 
  west 
  branch 
  of 
  Ganadaway 
  creek. 
  In 
  the 
  

   summer 
  of 
  1883 
  measurements 
  were 
  made 
  of 
  the 
  west 
  branch 
  of 
  

   Canadaway 
  creek 
  in 
  Chautauqua 
  county 
  from 
  July 
  18 
  to 
  Sep- 
  

   tember 
  2 
  of 
  that 
  year. 
  This 
  stream, 
  which 
  is 
  the 
  source 
  of 
  the 
  

   water 
  supply 
  of 
  the 
  village 
  of 
  Fredonia, 
  has 
  a 
  catchment 
  area 
  

   above 
  the 
  point 
  of 
  measurement 
  of 
  4.3 
  square 
  miles. 
  The 
  valley 
  

   is 
  deep 
  cut 
  for 
  a 
  distance 
  of 
  3 
  miles 
  from 
  the 
  measuring 
  point 
  to 
  

   its 
  extreme 
  headwaters. 
  Small 
  springs 
  issue 
  frequently 
  through- 
  

   out 
  the 
  valley. 
  On 
  July 
  18, 
  1883, 
  the 
  stream 
  was 
  flowing 
  at 
  the 
  

   rate 
  of 
  541,620 
  gallons 
  in 
  24 
  hours, 
  or 
  50.2 
  cubic 
  feet 
  per 
  minute, 
  

   and 
  very 
  gradually 
  decreased 
  to 
  270,000 
  gallons, 
  or 
  25 
  cubic 
  feet 
  

   per 
  minute, 
  on 
  July 
  22. 
  Rains 
  between 
  July 
  22 
  and 
  July 
  29 
  

   brought 
  the 
  stream 
  up 
  to 
  a 
  discharge 
  of 
  1,319,000 
  gallons 
  per 
  day, 
  

   or 
  122.1 
  cubic 
  feet 
  per 
  minute, 
  on 
  the 
  latter 
  date. 
  The 
  flow 
  then 
  

  

  