Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>This rating indicates the percentage of map units that meets the criteria </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>for hydric soils. Map units are composed of one or more map unit components </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>or soil types, each of which is rated as hydric soil or not hydric. Map units </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>that are made up dominantly of hydric soils may have small areas of minor </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>nonhydric components in the higher positions on the landform, and map units </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>that are made up dominantly of nonhydric soils may have small areas of minor </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>hydric components in the lower positions on the landform. Each map unit is </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>rated based on its respective components and the percentage of each component </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>within the map unit. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>The thematic map is color coded based on the composition of hydric components. </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>The five color classes are separated as 100 percent hydric components, 66 to </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>99 percent hydric components, 33 to 65 percent hydric components, 1 to 32 percent </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>hydric components, and less than one percent hydric components.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>In Web Soil Survey, the Summary by Map Unit table that is displayed below the </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>map pane contains a column named 'Rating'.In this column the percentage of each </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>map unit that is classified as hydric is displayed.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Hydric soils are defined by the National Technical Committee for Hydric Soils (NTCHS) </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>as soils that formed under conditions of saturation, flooding, or ponding long enough </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>during the growing season to develop anaerobic conditions in the upper part (Federal </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Register, 1994). Under natural conditions, these soils are either saturated or </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>inundated long enough during the growing season to support the growth and reproduction </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>of hydrophytic vegetation. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>The NTCHS definition identifies general soil properties that are associated with </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>wetness. In order to determine whether a specific soil is a hydric soil or nonhydric </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>soil, however, more specific information, such as information about the depth and </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>duration of the water table, is needed. Thus, criteria that identify those estimated </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>soil properties unique to hydric soils have been established (Federal Register, 2002). </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>These criteria are used to identify map unit components that normally are associated </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>with wetlands. The criteria used are selected estimated soil properties that are </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>described in "Soil Taxonomy" (Soil Survey Staff, 1999) and "Keys to Soil Taxonomy" </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>(Soil Survey Staff, 2006) and in the "Soil Survey Manual" (Soil Survey Division Staff, 1993). </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>If soils are wet enough for a long enough period of time to be considered hydric, </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>they should exhibit certain properties that can be easily observed in the field. </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>These visible properties are indicators of hydric soils. The indicators used to make </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>onsite determinations of hydric soils are specified in "Field Indicators of Hydric </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Soils in the United States" (Hurt and Vasilas, 2006).</SPAN></SPAN></P></DIV></DIV></DIV>
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Feature Label: Soils Hydric Rating
Feature Description: <div><span style="font-weight: bold;">Hydric Rating:</span> {HydrcRatng}</div><div><br/></div><div><span style="font-style: italic;">Class 1 is not hydric (0%) and class 5 is hydric (100%). Other classes are in between, see legend. </span><br/></div>
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HydrcRatng (Type: Int32, Visible: True, Searchable: True, Can Symbolize Unique Value: True, Can Symbolize Class Breaks: True, Addressable: True)
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