﻿HYDROLOGY 
  OF 
  NEW 
  YORK 
  149 
  

  

  records 
  at 
  the 
  north 
  ends 
  of 
  the 
  valleys 
  in 
  this 
  vicinity, 
  as 
  at 
  

   Hemlock 
  lake, 
  Avon, 
  Penn 
  Yan, 
  Lyons 
  and 
  a 
  number 
  of 
  other 
  

   places, 
  and 
  the 
  Geneva 
  record 
  is 
  probably 
  not 
  very 
  far 
  out 
  of 
  the 
  

   way. 
  

  

  In 
  order 
  to 
  compare 
  the 
  precipitation 
  record 
  with 
  that 
  of 
  the 
  

   drain 
  gages 
  the 
  precipitation 
  for 
  the 
  water 
  years 
  1883 
  to 
  1889, 
  in- 
  

   clusive, 
  is 
  given 
  — 
  the 
  yearly 
  mean 
  for 
  the 
  period 
  is 
  25.99 
  inches. 
  

   The 
  yearly 
  mean 
  precipitation 
  at 
  Hemlock 
  lake 
  for 
  the 
  water 
  

   years 
  1877-1900, 
  inclusive, 
  is 
  27.70 
  inches. 
  The 
  mean 
  of 
  the 
  stor- 
  

   age 
  period 
  at 
  Geneva 
  from 
  1883-1889, 
  inclusive, 
  is 
  8.89 
  inches, 
  

   while 
  at 
  Hemlock 
  lake 
  it 
  is 
  12.21 
  inches, 
  indicating 
  that 
  if 
  these 
  

   two 
  records 
  are 
  otherwise 
  comparable 
  the 
  Geneva 
  record 
  is 
  short 
  

   in 
  the 
  storage 
  period 
  a 
  little 
  over 
  3 
  inches. 
  

  

  Continuous 
  records 
  were 
  kept 
  at 
  Penn 
  Yan 
  from 
  1829-1867. 
  

   The 
  mean 
  rainfall 
  for 
  the 
  water 
  year 
  of 
  this 
  period 
  of 
  forty-eight 
  

   years 
  was 
  27.93 
  inches, 
  or 
  substantially 
  the 
  same 
  as 
  Hemlock 
  lake. 
  

  

  For 
  the 
  calendar 
  year 
  of 
  1899 
  the 
  recorded 
  precipitation 
  at 
  the 
  

   Geneva 
  Agricultural 
  Experiment 
  Station 
  was 
  19.35 
  inches, 
  while 
  

   at 
  Lyons 
  for 
  the 
  water 
  year 
  1899 
  it 
  was 
  20.91 
  inches. 
  On 
  account 
  

   of 
  the 
  uncertainty 
  as 
  to 
  the 
  winter 
  months, 
  the 
  Geneva 
  record 
  is 
  

   not 
  used 
  in 
  compiling 
  the 
  average 
  precipitation 
  of 
  the 
  Oswego 
  

   basin 
  as 
  given 
  in 
  table 
  No. 
  31. 
  

  

  In 
  table 
  No. 
  33, 
  Percolation 
  of 
  Drain 
  Gages 
  at 
  Geneva 
  Agri- 
  

   cultural 
  Experiment 
  Station 
  for 
  the 
  Water 
  Years 
  1883-1889, 
  In- 
  

   clusive, 
  we 
  have 
  the 
  runoff 
  of 
  the 
  three 
  drain 
  gages 
  given 
  for 
  the 
  

   water 
  years, 
  divided 
  into 
  storage, 
  growing 
  and 
  replenishing 
  

   periods, 
  and 
  in 
  table 
  No. 
  34, 
  Runoff 
  Data 
  of 
  Oswego 
  River 
  at 
  High 
  

   Dam 
  for 
  the 
  Water 
  Y 
  r 
  ears, 
  1897-1901, 
  Inclusive, 
  we 
  have 
  given 
  the 
  

   rainfall, 
  runoff 
  and 
  evaporation 
  for 
  these 
  years. 
  This 
  table 
  shows 
  

   that 
  the 
  average 
  runoff 
  for 
  the 
  years 
  included 
  was 
  11.07 
  inches, 
  

   while 
  the 
  preceding 
  table 
  shows 
  that 
  the 
  average 
  runoff 
  from 
  the 
  

   sod 
  for 
  the 
  seven 
  years, 
  1883-1889, 
  inclusive, 
  was 
  5.07 
  inches; 
  

   from 
  bare 
  soil, 
  7.55 
  inches, 
  and 
  from 
  cultivated 
  soil, 
  11.12 
  inches. 
  

   The 
  average 
  rainfall 
  during 
  the 
  years 
  1883-1889, 
  inclusive, 
  was 
  

   according 
  to 
  the 
  record 
  at 
  Geneva 
  25.99 
  inches, 
  while 
  during 
  the 
  

   years 
  1897-1901, 
  inclusive, 
  it 
  was 
  36.50 
  inches. 
  This 
  excess 
  of 
  

   rainfall 
  in 
  the 
  period 
  1897-1901, 
  over 
  what 
  it 
  was 
  in 
  the 
  period 
  

   1883-1889, 
  would, 
  by 
  itself, 
  cause 
  a 
  largely 
  increased 
  runoff. 
  In 
  

  

  