﻿

  HYDROLOGY 
  OF 
  NEW 
  YORK 
  693 
  

  

  square 
  miles 
  amounted 
  to 
  16.81 
  inches 
  on 
  the 
  catchment, 
  equiva- 
  

   lent 
  to 
  800,191 
  gallons 
  per 
  square 
  mile, 
  or 
  to 
  1.24 
  cubic 
  feet 
  per 
  

   second 
  per 
  square 
  mile. 
  The 
  water 
  drawn 
  from 
  the 
  new 
  catch- 
  

   ment 
  of 
  88.5 
  square 
  miles 
  that 
  year 
  amounted 
  to 
  3.67 
  inches 
  

   equivalent 
  to 
  174,776 
  gallons 
  per 
  square 
  mile 
  per 
  day, 
  or 
  to 
  0.27 
  

   of 
  a 
  cubic 
  foot 
  per 
  second 
  per 
  square 
  mile. 
  In 
  1895, 
  with 
  a 
  

   total 
  rainfall 
  of 
  35.64 
  inches, 
  the 
  original 
  catchment 
  of 
  65.6 
  

   square 
  miles 
  yielded 
  12.62 
  inches, 
  equivalent 
  to 
  600,723 
  gallons 
  

   per 
  square 
  mile 
  per 
  day, 
  or 
  to 
  0.93 
  of 
  a 
  cubic 
  foot 
  per 
  second 
  

   per 
  square 
  mile. 
  The 
  new 
  catchment 
  of 
  88.5 
  square 
  miles 
  fur- 
  

   nished 
  in 
  that 
  year 
  8.64 
  inches, 
  equivalent 
  to 
  411,558 
  gallons 
  

   per 
  square 
  mile 
  per 
  day, 
  or 
  to 
  0.64 
  of 
  a 
  cubic 
  foot 
  per 
  second 
  

   per 
  square 
  mile. 
  

  

  Summarizing 
  the 
  information 
  in 
  regard 
  to 
  the 
  water 
  yield 
  of 
  

   the 
  sand 
  plains 
  of 
  Long 
  Island, 
  it 
  may 
  be 
  stated 
  that 
  the 
  avail- 
  

   able 
  data 
  indicate 
  a 
  large 
  yield. 
  The 
  streams 
  of 
  eastern 
  New 
  

   York 
  can 
  not 
  be 
  relied 
  upon 
  in 
  their 
  natural 
  condition 
  to 
  yield 
  

   more 
  than 
  about 
  0.15 
  to 
  0.25 
  of 
  a 
  cubic 
  foot 
  per 
  second 
  per 
  

   square 
  mile, 
  while 
  with 
  an 
  ordinary 
  development 
  of 
  storage, 
  

   the 
  limit 
  may 
  be 
  usually 
  placed 
  at 
  from 
  0.7 
  to 
  0.8 
  of 
  a 
  cubic 
  

   foot 
  per 
  second 
  per 
  square 
  mile, 
  or 
  at 
  any 
  rate 
  at 
  not 
  much 
  

   exceeding 
  one 
  cubic 
  foot 
  per 
  second 
  per 
  square 
  mile. 
  The 
  sand 
  

   deposits 
  of 
  Long 
  Island 
  may 
  therefore 
  be 
  considered 
  as 
  great 
  

   natural 
  reservoirs 
  from 
  which, 
  with' 
  proper 
  development, 
  large 
  

   water 
  supplies 
  may 
  be 
  drawn, 
  the 
  same 
  as 
  from 
  reservoirs 
  

   artificially 
  created 
  on 
  the 
  earth's 
  surface, 
  these 
  natural 
  under- 
  

   ground 
  reservoirs 
  possessing 
  the 
  advantage 
  of 
  furnishing 
  a 
  

   filtered 
  water 
  of 
  high 
  purity. 
  This 
  fact 
  was 
  recognized 
  by 
  the 
  

   New 
  York 
  Water 
  Supply 
  Commission 
  of 
  1903, 
  who 
  have 
  recom- 
  

   mended 
  the 
  further 
  development 
  of 
  this 
  supply. 
  This 
  commis- 
  

   sion 
  made 
  extensive 
  observations 
  as 
  to 
  the 
  hight 
  of 
  ground 
  

   water, 
  etc. 
  

  

  Recent 
  Projects 
  for 
  Water 
  Supply 
  of 
  Greater 
  New 
  York 
  

   The 
  rapid 
  growth 
  of 
  Greater 
  New 
  York 
  has 
  compelled 
  a 
  gen- 
  

   eral 
  extension 
  of 
  the 
  water 
  supply, 
  and 
  a 
  number 
  of 
  able 
  reports 
  

   have 
  been 
  made, 
  which 
  will 
  be 
  briefly 
  referred 
  to. 
  

  

  The 
  first 
  of 
  these 
  is 
  in 
  relation 
  to 
  the 
  Kamapo 
  Water 
  Com- 
  

   pany, 
  which 
  was 
  organized 
  in 
  1887 
  under 
  an 
  act 
  which 
  per- 
  

   mitted 
  companies 
  organized 
  under 
  it 
  to 
  supply 
  with 
  water 
  any 
  

  

  