Note particularly the use of shaded areas to indicate rain.

□ Erosion unimpo'toni, •icept locolly

a Moderate sheei and gully erosion, serious locoliy k/)Si qii wind erosion, tlUmode'Oie sheel ond gully erosion

■ Moderate to severe wind erosion, some gullying locally ■ Moderate lo severe erosion includes mesas, mountains, canyons ond bodlonds

^M Severe sheet and gully erosion WPA, Division of Social Research. "Landlord and Tenant on the Cotton Plantation," 1936.

B. General Distribution of Erosion in the United States in 1936.

This map reveals that the South suffered as much from soil erosion as the mid-West.

CONTOUR MAPS

Original forest regions

V ^ t>RE5ENT rORC3T ARl

10^^ 100 iOO S00MIH3

merci timber

Warren H. ManninR. "A National Plan Study Brief." Special Supplement to Landscape Architecture, July \m3, American Association of Landscape Architects. Cambridge. Mass.

Original and Present Forest Areas In the United States.

Before and after comparisons arc always interesting. These two maps tell the story of the vanishing forest.

GRAPHIC PRESENTATION

National Reiourcps Board, "State Planning." 1Q35. SCALE .7

Average Annual Precipitation in the State of Utah.

Since a key to the shadings is given in this map, it is much easier to read than 231. 1910

LEGEND

INHABITANTS PER SOUARC MILE

I I ^^ 2-5 JH 6 - 17 Q IS - 44 ((45-89

90 AND MORE

WPA, Division of Social Rrsrarrh, "The People of the DrouEht States." March 1037.

Density of Population in the Drought Area in the United States for the Years 1870, 1890. 1910, and 1930.