|
<br />I
<br />
<br />002928
<br />
<br />I
<br />
<br />By drawing lines around areas of land with similarities in soil, relief,
<br />geology and vegetation it is possible to make a general soil map of the
<br />basin. The different kinds of soil are broadly associated and form
<br />patterns that are repeated from place to place.
<br />
<br />I
<br />
<br />I
<br />
<br />A general soil map is useful to compare different parts of the basin or
<br />locate soil having general similarities and suitability. The broad
<br />characteristics and relationships show in a general way potential of the
<br />soils for agricultural, industrial, commercial and recreational uses.
<br />
<br />I
<br />
<br />I
<br />
<br />The basin is divided on the General Soil Map (Figure 4) among 7 major
<br />units for purposes of broad interpretation. So that more specific
<br />statements could be made concerning soils and agriculture, soil mapping
<br />unit 2.0 was divided further into four units and soil mapping unit 5.0
<br />was broken into three units. Twelve mapping units have been delineated
<br />and described. Separations between units are generalized in accordance
<br />with requirements imposed by the map scale. Acreage distribution of
<br />~nits and percent that each occupies is given in table 1.
<br />
<br />II
<br />
<br />I
<br />
<br />Table l.--Acreage of soil mapping units and percent of area covered,
<br />Yampa River Basin in Colorado and Wyoming, 1966.
<br />
<br />I
<br />
<br />I
<br />
<br />Map Colorado Wyoming Yampa River Basin
<br />symbol
<br /> Acres Percent Acres Percent Acres Percent
<br /> -
<br />1.0 586,000 13.7 1,050,000 58.4 1,636,000 26.8
<br />2.1 294,000 6.8 28,000 1.5 322,000 5.3
<br />2.2 0 0 257,000 14.3 257,000 4.2
<br />2.3 715,000 16.6 30,000 1.7 745,000 12.2
<br />2.4 100,000 2.3 0 0 100,000 1.6
<br />3.0 377 ,000 8.8 0 0 377 ,000 6.2
<br />4.0 445,000 10.4 0 0 445,000 7.3
<br />5.1 917,000 21.3 155,000 8.6 1,072,000 17 .6
<br />5.2 36,000 .8 112,000 6.2 148,000 2.4
<br />5.3 498,000 11.6 81,000 4.5 579,000 9.5
<br />6.0 309,000 7.2 86,000 4.8 395,000 6.5
<br />7.0 23,000 .5 0 0 23,000 .4
<br />Total 4,300,000 100.0 1,799,000 100.0 6,099,000 100.0
<br />
<br />II
<br />I
<br />
<br />.'
<br />
<br />'I
<br />
<br />I
<br />
<br />II
<br />
<br />Source:
<br />
<br />USDA Field Party
<br />
<br />I
<br />
<br />- 11 -
<br />
<br />I
<br />
|