﻿494 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Minimum 
  floiv 
  of 
  Genesee 
  river. 
  The 
  following 
  tabulation 
  gives 
  

   the 
  mean 
  monthly 
  flows 
  of 
  the 
  Genesee 
  river 
  at 
  Mount 
  Morris 
  and 
  

   Rochester 
  for 
  several 
  low 
  months 
  of 
  the 
  year 
  1895, 
  the 
  catchment 
  

   area 
  above 
  Mount 
  Morris 
  being 
  1070' 
  square 
  miles 
  and 
  that 
  above 
  

   Rochester, 
  2365 
  square 
  miles: 
  

  

  Mount 
  Morris 
  Rochester 
  

  

  Month 
  

  

  Cubic 
  feet 
  Cubic 
  feet 
  

   per 
  sec- 
  per 
  second 
  

   ond 
  per 
  square 
  

   mile 
  

  

  Inches 
  on 
  

   the 
  catch- 
  

   ment 
  

  

  Cubic 
  feet 
  

   per 
  sec- 
  

   ond 
  

  

  Cubic 
  feet 
  

  

  per 
  second 
  

  

  per 
  square 
  

  

  mile 
  

  

  174 
  

  

  0.163 
  

  

  0.19 
  

  

  385 
  

  

  0.380 
  

  

  128 
  

  

  0.119 
  

  

  0.13 
  

  

  283 
  

  

  0.226 
  

  

  105 
  

  

  0.099 
  

  

  0.11 
  

  

  232 
  

  

  0.165 
  

  

  115 
  

  

  0.108 
  

  

  0.12 
  

  

  254 
  

  

  0.16& 
  

  

  • 
  100 
  

  

  0.0-93 
  

  

  0.10 
  

  

  221 
  

  

  0.106 
  

  

  104 
  

  

  0.097 
  

  

  0.11 
  

  

  230 
  

  

  0.0*93 
  

  

  May 
  

  

  June 
  

  

  July 
  

  

  August 
  . 
  . 
  . 
  

   September 
  

   October 
  . 
  . 
  

  

  Comparing 
  the 
  foregoing 
  figures 
  for 
  Mount 
  Morris 
  with 
  those 
  

   for 
  Rochester 
  for 
  the 
  month 
  of 
  October, 
  1895, 
  it 
  is 
  seen 
  that 
  the 
  

   proportion 
  of 
  runoff 
  at 
  Rochester 
  was 
  somewhat 
  less 
  for 
  that 
  

   month 
  than 
  at 
  Mount 
  Morris, 
  although 
  for 
  the 
  previous 
  months 
  it 
  

   appears 
  to 
  have 
  been 
  larger. 
  The 
  explanation 
  of 
  this 
  is 
  that 
  there 
  

   are 
  between 
  Rochester, 
  Mount 
  Morris 
  and 
  Dansville 
  extensive" 
  

   flats 
  aggregating 
  from 
  60 
  to 
  80 
  square 
  miles. 
  The 
  temporary 
  

   ground-water 
  storage 
  of 
  these 
  flats 
  acts 
  to 
  sustain 
  a 
  somewhat 
  

   more 
  equable 
  flow 
  at 
  Rochester 
  than 
  at 
  Mount 
  Morris, 
  above 
  which 
  

   point 
  there 
  are 
  proportionately 
  smaller 
  areas 
  of 
  flats. 
  There 
  are 
  

   nevertheless 
  some 
  exceptions 
  to 
  this 
  general 
  proposition, 
  as 
  when, 
  

   in 
  a 
  long-continued 
  dry 
  time, 
  the 
  flats 
  become 
  exhausted 
  of 
  

   moisture, 
  and 
  to 
  some 
  extent 
  act 
  like 
  a 
  sponge, 
  taking 
  up 
  water 
  

   from 
  the 
  river, 
  thereby 
  decreasing, 
  in 
  a 
  measure, 
  the 
  outflow 
  at 
  

   Rochester. 
  

  

  In 
  the 
  summer 
  of 
  1846 
  Daniel 
  Marsh 
  made 
  a 
  series 
  of 
  measure- 
  

   ments 
  in 
  order 
  to 
  determine 
  the 
  low-water 
  flow 
  of 
  that 
  year. 
  As 
  

   the 
  result 
  of 
  nine 
  measurements 
  made 
  at 
  various 
  times 
  in 
  July 
  and 
  

   August 
  he 
  placed 
  the 
  minimum 
  flow 
  at 
  Rochester 
  in 
  1846 
  at 
  412 
  

   cubic 
  feet 
  per 
  second. 
  1 
  

  

  At 
  Middlebury 
  Academy, 
  Wyoming 
  county, 
  in 
  the 
  catchment 
  

   area 
  of 
  Oatka 
  creek, 
  the 
  rainfall 
  for 
  the 
  water 
  year 
  1845 
  was, 
  for 
  

  

  Tor 
  these 
  low 
  water 
  gagings 
  of 
  Genesee 
  river 
  in 
  detail, 
  see 
  pp. 
  182-3. 
  

  

  