Environmental Engineering Reference
In-Depth Information
(f) Column H contains the landform in which you will find the hydric
component.
(g) Column I provides the criteria that was used to establish this component as
hydric.
2. Now go to the Soil Data Mart (
http://soildatamart.nrcs.usda.gov/
) and look up
the local Hydric Soil List for your survey area.
(a) Click on “select state” and select the state you are in.
(b) Click on “select survey area” and select the one you are interested in.
(c) Click on “generate reports” and click on “select all” to select all the map
units in the survey area. This should highlight all the map units. You can also
select individual map units if you do not want a list of the whole county.
(d) From the pull down menu of reports, select “hydric soils” and click on
“generate report”.
(e) It will take a moment for the hydric soil report to come up.
(f) This report gives you the same information that is presented in the national
Hydric Soil List, however, this report is updated any time information is
updated in Soil Data Mart, while the national Hydric Soil List is only updated
about once a year. There may be differences if an update to Soil Data Mart
was made after the national Hydric Soil List was generated. Soil Data Mart
should be your source for official (and current) soil survey information.
3. Now go to Web Soil Survey (
http://websoilsurvey.nrcs.usda.gov/
)
(a) Click on “start WSS”.
(b) Locate your area of interest. You can do this by: selecting state and county
and then zooming in by clicking the icon at the top of the map with a
magnifying glass with a
sign in the upper left of the map screen, soil
survey area and zooming into your area of interest, typing in an address,
using latitude and longitude, or any of the other methods listed (Use the help
menu in Web Soil Survey for more detailed instructions.).
(c) Once zoomed in, click on either the area of interest rectangle icon or the area
of interest icon that allows an irregular shape. These icons are located in the
upper left of the map screen.
(d) Outline the area of interest on the map and then click on the “Soil Data
Explorer” tab. You should now see a soils map overlaying your area of interest.
(e) Under the tab “Suitability and Limitations for Use” click on “Land Classifi-
cation”, then “Hydric Rating by Map Unit”, and then view rating.
(f) This will produce a map that shows map units that are hydric, partially hydric
(contain components that are both hydric and non-hydric), or not hydric.
(g) Click on “Add to Shopping Cart” in the upper right and then ok.
(h) Click on the “Shopping Cart” tab at the top, and then “Check Out” in the
upper right and then ok.
(i) Now you have a customized .pdf soil survey report for your area of interest
that contains the Hydric Soils List information from Soil Data Mart along
with a map categorizing those map units that are hydric, partially hydric, or
non-hydric. You can save this to your computer and/or print the file for use
when you do your on-site investigation exercise a little later.
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