332 



A NATIONAL PLAN FOR AMERICAN FORESTRY 



region were visited by a drought of extraordinary length and severity. 

 Maryland received only 56 percent of the normal rainfall in that year, 

 Delaware 65 percent, and Pennsylvania 68 percent. Although this 

 drought was a record one for the region as a whole, in central New 

 England it was exceeded by the drought of 1929. Extremely heavy 

 downpours in brief periods of time are also characteristic of the re- 

 gional rainfall. The middle Atlantic coast, with its center in north- 

 eastern New Jersey, is particularly subject to very heavy precipita- 

 tion; between 1843 and 1929 this region experienced 102 storms of 





DOMINION or CANADA 



RELATIVE INFLUENCE OF FORESTS 

 ON WATERSHEDS 



y--^< MAJOR INFLUENCE 



MODERATE INFLUENCE 

 '2%%i\ SLIGHT INFLUENCE 



FIGURE 3. Northeastern drainages, and lower portion of St. Lawrence River Basin. 



5-inch precipitation in 24 hours. Two storms during that period pro- 

 duced 15 inches of rain in 24 hours. Annual snowfall ranges from an 

 average of 14 inches at the Delaware capes to 150 inches in the Adiron- 

 dack Mountains of New York. It is from 50 to 100 inches through- 

 out Maine, but in the southern part of the region reaches 50 inches 

 only at the higher elevations. Snow lies on the ground for one to 

 five months, depending on latitude and altitude. 



Elevations above sea level are less than 500 feet throughout the 

 coastal plain and much of the adjacent piedmont province, and in 



