﻿HYDROLOGY 
  OF 
  NEW 
  YORK 
  

  

  629 
  

  

  be 
  made 
  for 
  carrying 
  over 
  moderate 
  quantities 
  of 
  water 
  from 
  the 
  

   latter 
  end 
  of 
  the 
  year 
  more 
  effectually 
  than 
  in 
  any 
  other 
  way. 
  

   An 
  exception 
  has 
  been 
  made 
  to 
  this 
  general 
  proposition 
  in 
  the 
  

   case 
  of 
  Schroon 
  valley 
  reservoir, 
  discussed 
  in 
  detail 
  on 
  another 
  

   page. 
  

  

  Table 
  No. 
  86 
  — 
  Mean 
  precipitation 
  on 
  the 
  upper 
  Hudson 
  catchment 
  area 
  

  

  (In 
  inches) 
  

  

  MONTH 
  

  

  a 
  

  

  o3 
  

  

  "3 
  

  

  GO 
  

  

  © 
  

  

  3 
  . 
  

  

  i2 
  

  

  > 
  

   © 
  

  

  ,0 
  co^5 
  

  

  <k 
  

   © 
  

  

  CO 
  

  

  © 
  o 
  

  

  QQ 
  

   © 
  

  

  2 
  

   o3 
  

   © 
  

  

  o3 
  

  

  a 
  

   u 
  

  

  © 
  

  

  u 
  

  

  o 
  

  

  <6 
  

  

  <a 
  

   o 
  

   a 
  

  

  >> 
  

   o 
  

  

  Hi 
  

  

  i 
  

  

  o 
  

   cS 
  

  

  a 
  >> 
  

  

  IS 
  

   o 
  © 
  

  

  a 
  

   ■§ 
  

  

  i 
  

  

  © 
  >j 
  

  

  '5 
  

   -a 
  

  

  1 
  

  

  i 
  

  

  © 
  

  

  o3 
  

   >> 
  

  

  s§ 
  

  

  © 
  

   u 
  

  

  "3 
  

  

  oS 
  

  

  "3 
  

   o 
  

  

  03 
  

   © 
  

  

  (1) 
  

  

  (2) 
  

  

  (3) 
  | 
  (4) 
  

  

  (5) 
  

  

  (6) 
  

  

  (7) 
  

  

  (8) 
  

  

  (9) 
  

  

  (10) 
  

  

  (11) 
  

  

  (12) 
  

  

  (13) 
  

  

  December 
  

  

  2.71 
  

   2.75 
  

   2.49 
  

   2.72 
  

   2.80 
  

   3.62 
  

  

  3.19 
  | 
  2.75 
  

   3.16 
  1 
  3.00 
  

   3.03 
  1 
  2.22 
  

   2.72 
  | 
  2.24 
  

   2.15 
  I 
  2.09 
  

   3.10 
  J 
  3.05 
  

  

  3.01 
  

   3.03 
  

   2.64 
  

   2.50 
  

   2.14 
  

   3.14 
  

  

  4.31 
  

   3.36 
  

   2.83 
  

   2.94 
  

   2.02 
  

   3.17 
  

  

  3.57 
  

   3.88 
  

   3.60 
  

   2.52 
  

   2.39 
  

   4.46 
  

  

  2.14 
  

   2.35 
  

   2.43 
  

   1.78 
  

   1.91 
  

   2.79 
  

  

  2.91 
  

   3.30 
  

   2.86 
  

   3.63 
  

   2.93 
  

   3.45 
  

  

  2.36 
  

   3.36 
  

   2.61 
  

   2.12 
  

   3.36 
  

   3.65 
  

  

  2.78 
  

   2.69 
  

   2.06 
  

   2.36 
  

   2.53 
  

   3.04 
  

  

  2.48 
  

   2.08 
  

   1.42 
  

   1.74 
  

   2.13 
  

   3.47 
  

  

  2.92 
  

  

  January 
  

  

  2.99 
  

  

  

  2.56 
  

  

  March 
  

  

  2.48 
  

  

  April 
  

  

  2.43 
  

  

  

  3.38 
  

  

  

  

  Storage 
  period 
  . 
  

  

  17.09 
  

  

  17.35 
  15.35 
  

  

  16.47 
  

  

  18.63 
  

  

  20.42 
  

  

  13.40 
  

  

  19.08 
  

  

  17.46 
  

  

  15.46 
  

  

  13.32 
  

  

  16.76 
  

  

  June 
  

  

  July 
  

  

  4.07 
  

   4.29 
  

   3.96 
  

  

  2.83 
  1 
  2.89 
  

   3.25 
  ! 
  3.61 
  

   4.17 
  4.21 
  

  

  2.99 
  

   3.53 
  

   4.20 
  

  

  3.24 
  

   3.44 
  

   3.91 
  

  

  3.88 
  

   3.83 
  

   5.07 
  

  

  3.42 
  

   3.67 
  

   2.85 
  

  

  4.20 
  

   4.01 
  

   3.14 
  

  

  4.66 
  

   3.91 
  

   3.98 
  

  

  4.29 
  

   4.21 
  

   3.66 
  

  

  3.21 
  

   3.63 
  

   2.97 
  

  

  3.67 
  

   3.78 
  

  

  August 
  

  

  3.79 
  

  

  

  

  Growing 
  period 
  

  

  12.32 
  

  

  10.25 
  10.71 
  

  

  10.75 
  

  

  10.59 
  

  

  12.78 
  

  

  9.94 
  

  

  11.35 
  

  

  12.55 
  

  

  12.16 
  

  

  9.81 
  

  

  11.25 
  

  

  September 
  

  

  October 
  

  

  November 
  

  

  3.43 
  

   3.58 
  

   3.08 
  

  

  2.96 
  ! 
  3.00 
  

   2.36 
  ! 
  2.49 
  

   3.24 
  3.56 
  

  

  3.13 
  

   2.60 
  

   3.26 
  

  

  3.51 
  

   3.41 
  

  

  2.84 
  

  

  3.57 
  

   3.06 
  

   3.46 
  

  

  2.84 
  

   3.29 
  

   2.94 
  

  

  2.87 
  

   3.20 
  

   3.33 
  

  

  3.27 
  

   3.60 
  

   3.29 
  

  

  3.08 
  

   3.56 
  

   2.46 
  

  

  2.67 
  

   2.90 
  

  

  2.88 
  

  

  8.45 
  

  

  3.12 
  

   3.15 
  

   3.11 
  

  

  Replenishing- 
  

  

  period 
  

  

  10.09 
  

  

  8.56 
  9.05 
  

  

  8.99 
  

  

  .9.76 
  

  

  10.09 
  

  

  9.07 
  

  

  9.49 
  

  

  10.16 
  

  

  9.11 
  

  

  9.38 
  

  

  Yearly 
  total.. 
  

  

  39.50 
  

  

  36.16 
  35.11 
  

  

  36.22 
  38.98 
  

  

  43.29 
  

  

  32.41 
  

  

  39.92 
  

  

  40.17 
  

  

  36.73 
  

  

  31.58 
  

  

  37.39 
  

  

  The 
  figures 
  in 
  the 
  above 
  table 
  are 
  obtained 
  by 
  averaging 
  the 
  results 
  obtained 
  at 
  

   Albany 
  from 
  1825 
  to 
  1895; 
  at 
  Glens 
  Palls, 
  from 
  1879 
  to 
  1895; 
  at 
  Keene 
  Valley, 
  from 
  1879 
  

   to 
  1895 
  ; 
  in 
  western 
  Massachusetts, 
  from 
  1887 
  to 
  1895 
  ; 
  in 
  northern 
  plateau, 
  from 
  1889 
  to 
  

   1895 
  ; 
  at 
  Lowville 
  academy, 
  from 
  1827 
  to 
  1848 
  ; 
  at 
  Johnstown 
  academy, 
  from 
  1828 
  to 
  

   1845 
  ; 
  at 
  Cambridge 
  academy, 
  from 
  1827 
  to 
  1839 
  ; 
  at 
  Fairfield 
  academy, 
  from 
  1828 
  to 
  

   1849 
  ; 
  at 
  Granville 
  academy, 
  from 
  1835 
  to 
  1849 
  ; 
  the 
  mean 
  of 
  Albany, 
  Glens 
  Falls 
  and 
  

   Keene 
  Valley, 
  from 
  1879 
  to 
  1895. 
  Although 
  the 
  foregoing 
  figures 
  are 
  here 
  given 
  in 
  

   detail, 
  later 
  studies 
  indicate 
  that 
  the 
  mean 
  rainfall 
  of 
  the 
  northern 
  plateau 
  as 
  defined 
  

   by 
  the 
  State 
  Meteorological 
  Bureau 
  is 
  the 
  best 
  rainfall 
  record 
  to 
  apply 
  to 
  the 
  upper 
  

   Hudson 
  area. 
  

  

  The 
  proposed 
  regulation 
  of 
  the 
  Hudson 
  river 
  has 
  been 
  provi- 
  

   sionally 
  arranged 
  on 
  the 
  basis 
  of 
  maintaining 
  a 
  flow 
  of 
  at 
  least 
  

   4500 
  cubic 
  feet 
  per 
  second 
  at 
  Mechanicville, 
  where, 
  as 
  has 
  been 
  

   seen, 
  the 
  catchment 
  area 
  is 
  4500 
  square 
  miles, 
  such 
  a 
  regulation 
  

   being 
  equivalent 
  to 
  producing 
  at 
  Mechanicville 
  a 
  constant 
  flow 
  of 
  1 
  

   cubic 
  foot 
  per 
  second 
  per 
  square 
  mile. 
  

  

  As 
  regards 
  the 
  change 
  in 
  the 
  regimen 
  of 
  the 
  stream 
  due 
  to 
  

   storage, 
  it 
  may 
  be 
  remarked 
  that 
  the 
  reservoirs 
  have 
  been 
  

  

  