﻿200 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Fig. 
  13 
  is 
  a 
  diagram 
  of 
  the 
  revised 
  gagings 
  of 
  Croton 
  river 
  from 
  

   1877 
  to 
  1899, 
  inclusive. 
  

  

  The 
  maximum, 
  minimum, 
  and 
  mean 
  runoff 
  may 
  be 
  obtained 
  

   from 
  the 
  tabulations 
  on 
  each 
  figure. 
  

  

  It 
  is 
  evident 
  that 
  proceeding 
  in 
  the 
  same 
  way 
  as 
  for 
  the 
  fore- 
  

   going 
  diagrams, 
  figs. 
  11 
  to 
  13, 
  inclusive, 
  diagrams 
  may 
  be 
  prepared 
  

   for 
  the 
  storage, 
  growing, 
  and 
  replenishing 
  periods, 
  and 
  a 
  curve 
  

   drawn 
  from 
  which 
  the 
  runoff 
  for 
  a 
  given 
  rainfall 
  may 
  be 
  taken. 
  

  

  40 
  40 
  

  

  UPPER 
  HUDSON 
  RIVER 
  

  

  Storage 
  period 
  

   30 
  * 
  30 
  

  

  03 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

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  w 
  25 
  

  

  

  

  

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  5 
  JO 
  15 
  20 
  2 
  

  

  Precipitation 
  in 
  inches 
  

   5 
  10 
  15 
  20 
  2 
  

  

  5 
  

  

  5 
  

  

  

  

  

  3 
  

  

  

  

  

  

  

  35 
  

  

  Fig. 
  14 
  Diagram 
  showing 
  the 
  relation 
  between 
  precipitation 
  

   and 
  runoff 
  in 
  the 
  Upper 
  Hudson 
  river 
  catchment 
  during 
  the 
  

   storage 
  period. 
  

  

  Fig. 
  14 
  is 
  such 
  a 
  diagram 
  for 
  the 
  storage 
  period 
  on 
  the 
  Upper 
  

   Hudson 
  river 
  for 
  the 
  years 
  1888-1901, 
  inclusive. 
  This 
  diagram 
  

   shows 
  that 
  aside 
  from 
  the 
  years 
  1890 
  and 
  1894 
  the 
  runoff 
  of 
  this 
  

   catchment 
  area 
  was 
  substantially 
  accurate 
  during 
  the 
  storage 
  

   period. 
  It 
  is 
  probable 
  that 
  in 
  these 
  two 
  years 
  their 
  accuracy 
  

   may 
  have 
  been 
  interfered 
  with 
  by 
  ice, 
  although 
  just 
  the 
  cause 
  is 
  

   not 
  definitely 
  known 
  — 
  it 
  may 
  have 
  been 
  in 
  the 
  rainfall. 
  

  

  Fig. 
  15 
  is 
  a 
  similar 
  diagram 
  for 
  the 
  Upper 
  Hudson 
  river 
  during 
  

   the 
  growing 
  period 
  for 
  the 
  same 
  years. 
  This 
  diagram 
  shows 
  that 
  

   aside 
  from 
  1897, 
  the 
  runoffs 
  were 
  substantially 
  right 
  during 
  this 
  

   period. 
  

  

  