SOILS MAP DEVELOPMENT

CP3 Soils, Emphasizing PM-10 Emitting  Soils Series

The basis for the WIO (Wash., Idaho, Oregon) soil codes is the Soils of Washington by Boling, Frazier and Busacca, prepared by WSU in cooperation with the United States Department of Agriculture's NRCS in 1998.  The legend materials from that soils map are discussed in the map's companion document. The Washington soils appendix details the numeric and character codes used in that map.  The Washington soils are coded as values 1 (water) through 107.  The pm10 project adopted these numeric codes as a basis.  To these codes have been added extensions for soils in Idaho and regon.  Idaho soils were digitized from a Idaho soils map (see references below).

The Idaho map soil units were given WIO_GS codes as follow:

          ID_Soil        WIO_GS code
          10             110
          67              86
           1             111
           3             112
          64             113
          65              79
          66              69
           5              42
           6              50
           7              66
          11             114
           4              45
           2             115

For those Idaho soils that appear very similar or identical to Washington soils (sometimes directly across the state line) the Idaho soil was assigned the Washington soil's numeric code.  For Idaho soils that were not clearly associated with Washington soils, new codes were added in the range of 110 to 115.  The range of 110 through 150 is reserved for Idaho codes.  Similarly, Oregon soils were also equated to Washington soils,or given new codes in the WIO_GS coding scheme.

          OR_Soil        WIO_GS code
          Q              151
          V              152
          H              153
          M1             154
          M2              84
          M3             155
          M4             156
          M5             157
          M6              86
          M7             158
          M8             159
          M9             160
          M10             71
          M11            161
          L1             107
          L2             162
          L3             163
          L4             164
          S1              88
          S2              83
          S3              70
          S8             165
          P1             166
          P2             167
          E2             168
          E3              99
          Q7              73
          Q1             169
          O3              87
          O4             170
          O5             171
          O6             172
          U1              74
          U2              78
          A              173

Thus, Oregon soils requiring new unique codes were assigned codes in the range of 151 through 173.

Targeted soils, in terms of soil erosion by wind, include Washington soils L1 through L5 (coded as 82 through 86) and Washington soils Dq1, Dq2, De1, De2, Ds1 and Ds2 (coded as 74 through 79).

References:

Maureen Boling, Bruce Frazier and Alan Busacca, SOILS OF WASHINGTON, 1998.

United Stated Department of Agriculture, Soil Conservation Service, with U.S.D.I. Bureau of Land Management, U.S.D.A. Forest Service, and University of Idaho College of Agriculture, GENERAL SOIL MAP, IDAHO, July 1984.

United States Department of Agriculture, Soil Conservation Service, with Oregon Agricultural Experiment Station, U.S.D.I. Bureau of Land Management, and U.S.D.A. Forest Service, GENERAL SOIL MAP, STATE OF OREGON, January 1986.

Source Area Studies Using AVHRR and GIS, Joseph K. Vaughan and Bruce E. Frazier, Proceedings of the International Specialty Conference on Particulate Matter: Health and Regulatory Issues, Pittsburg, p525-36, 1995.