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Lenore Matula Vasilas Soil Scientist NRCS Soil Survey Division.

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Presentation on theme: "Lenore Matula Vasilas Soil Scientist NRCS Soil Survey Division."— Presentation transcript:

1 Lenore Matula Vasilas Soil Scientist NRCS Soil Survey Division

2 Hydrophytic vegetation and wetland hydrology factors Mapping conventions Legislative issues other than those specifically related to hydric soils

3 7 CFR Part NRCS responsibilities regarding wetlands. (a) Technical and coordination responsibilities. In carrying out the provisions of this part, NRCS shall: (1) Oversee the development and application of criteria to identify hydric soils in consultation with the National Technical Committee for Hydric Soils and make available to the public an approved county list of hydric soil map units, which is based upon the National List of Hydric Soils;…

4 NRCS Chris Smith, NHQ, chair Shawn Finn, MA Steve Lawrence, GA Aaron Miller, NM Steve Monteith, NSSC Paul Rodrigue, MS Lenore Vasilas, NHQ USACE Chris Noble USEPA Ralph Spagnolo USFS Vacant BLM Robert Boyd USFWS Jim Dick University Richard Griffin, Prairie View Wade Hurt, Univ. of FL Chien-Lu Ping, Univ of AK Mike Vepraskas, NCSU

5 The Corps of Engineers Wetland Determination and Delineation Manual and Regional Supplements with Variances NRCS relies more often on off-site determinations (hydric soils list and soil survey maps) Soils information written in consultation with NTCHS Supplements adopted NTCHS Field Indicators Supplements adopted 14 day hydrology requirement Hydric soils definition wording differences Soon to be updated manual will eliminate many method inconsistencies between CWA and FSA and, therefore, eliminate many of the current variances

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7 1. The hydric soils definition. 2. The characteristics of a map unit component on the hydric soil list 3. A field indicator of hydric soils 4. The technical standard. 5. Any of the above. 6. All the above.

8 1. The hydric soils definition. 2. The characteristics of a map unit component on the hydric soil list 3. A field indicator of hydric soils 4. The technical standard. 5. Any of the above. 6. All the above.

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10 Food Security Act a soil that, in its undrained condition, is saturated, flooded, or ponded long enough during the growing season to develop an anaerobic condition that supports the growth and regeneration of hydrophytic vegetation [16 U.S.C. 3801(a)(12)]. NTCHS a soil that formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part (Federal Register, 1994)

11 Map unit component listed as hydric on the Hydric Soils List Meets at least one of the Field Indicators of Hydric Soils in the United States Has the characteristics of a problematic hydric soil and the site has been proven to also meet hydrophytic vegetation and wetland hydrology factors Meets the Hydric Soil Technical Standard

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13 Originally a list of soil series Original criteria required a water table and water table data Original list was queried from old SSSD database and not NASIS State and Survey Area lists were lists of map units and different than the National List Original state and county list had to be significantly hand edited by states

14 area symbolarea name map unit sequence map unit symbol map unit name component name and phase component percent landformshydric rating IA067 Floyd County, Iowa 343 Bremer silty clay loam, 0 to 2 percent slopes Bremer100 Stream terraces Yes IA067 Floyd County, Iowa 984 Clyde silty clay loam, 0 to 3 percent slopes Clyde85InterfluvesYes IA067 Floyd County, Iowa 984 Clyde silty clay loam, 0 to 3 percent slopes Maxfield2FlatsYes IA067 Floyd County, Iowa 984 Clyde silty clay loam, 0 to 3 percent slopes Marshan, 32 to 40 inches to sand and gravel 3River valleysYes IA067 Floyd County, Iowa 1088 Nevin silt clay loam, 0 to 2 percent slopes Bremer5 Stream terraces Yes IA067 Floyd County, Iowa 1196 Turlin loam, 0 to 2 percent slopes Coland, occasionally flooded 5Flood plainsYes IA067 Floyd County, Iowa Coland clay loam, 0 to 2 percent slopes Coland, occasionally flooded 95Flood plainsYes

15 Federal Register Vol. 77, No. 40 Wednesday, February 29, 2012 Based on deliberations of the NTCHS 30 day public comment period Fixed issues related to changes in database and changes to format (list of series vs. list of map units) Biggest issue was water table requirement in old criteria but not in definition of hydric soil

16 Same Soil Series but Possibly Different Map Units

17 (1) All Histels except Folistels and Histosols except Folists; or (2) Map unit components in Aquic suborders, great groups, or subgroups, Albolls suborder, Historthels great group, Histoturbels great group, or Andic, Cumulic, Pachic, or Vitrandic subgroups that: (a) Based on the range of characteristics for the soil series, will at least in part meet one or more Field Indicators of Hydric Soils in the United States, or (b) Show evidence that the soil meets the definition of a hydric soil; (3) Map unit components that are frequently ponded for long duration or very long duration during the growing season that: (a) Based on the range of characteristics for the soil series, will at least in part meet one or more Field Indicators of Hydric Soils in the United States, or (b) Show evidence that the soil meets the definition of a hydric soil; or (4) Map unit components that are frequently flooded for long duration or very long duration during the growing season that: (a) Based on the range of characteristics for the soil series, will at least in part meet one or more Field Indicators of Hydric Soils in the United States, or (b) Show evidence that the soils meet the definition of a hydric soil.

18 The National List of Hydric Soils can be found on the NTCHS website (http://soils.usda.gov/use/hydric/)http://soils.usda.gov/use/hydric/ National Coverage Updated yearly Local List of Hydric Soils can be found on Soil Data Mart or Web Soil Survey (http://soils.usda.gov/)http://soils.usda.gov/ Soil Data Mart data grouped by Survey Area Web Soil Survey has size limit Updated as official data is updated

19 General planning Preliminary data gathering Along with other info for off-site determinations Identification of potential WRP sites

20 Hydric All major and minor components are hydric Predominantly Hydric All major components are hydric but some minor components non-hydric Partially Hydric Complex with at least one major component hydric and one major component non-hydric Predominantly Non-hydric All major components non-hydric and at least one minor component hydric Non-Hydric All major and minor components non-hydric

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22 Field indicators are soil morphological features used to identify hydric soils The features result from soil genesis in the presence of anaerobic conditions They are used for on-site verification

23 Continuous process On-going since mid-80s Inter-agency Including universities, private sector, federal, state, and local agencies Multi-disciplinary Soil scientists, hydrologists, botanists

24 Reduction, translocation, and precipitation of iron and manganese Accumulation and differential translocation of organic matter Reduction of sulfur

25 Indicators are not intended to replace or relieve the requirements contained in the Hydric Soil Definition Indicators are used to identify the hydric soil component of wetlands; however, there are some hydric soils that lack one of the currently listed indicators

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27 If it meets a Field Indicator it is a hydric soil If it does not meet a Field Indicator it may still be a hydric soil if it meets the definition of a hydric soil

28 All soils Use regardless of texture Mostly organic based indicators Sandy soils Loamy soils Use sandy indicators in sandy layers, and loamy indicators in loamy layers

29 A chroma of 2 or less means that the chroma cannot be higher than 2 Values should be rounded to the nearest color chip Except for F8, F12, F19, F20 and F21 all mineral Field Indicators must have less then 15 cm (6 in) of a chroma > 2 above the indicator.

30 In al LRRs, for Field Indicators A1, A2, and A3 begin measurements at the actual soil surface. In LRRs R, W, X, and Y, all other observations begin at the top of the mineral surface. In LRRs F, G, H, and M, we begin our observations at the actual soil surface if the soil is sandy and for all other observations at the muck or mineral surface For all other LRRs we begin all other observations at the muck or mineral surface.

31 It is permissible to combine certain hydric soil indicators if all requirements of the indicators are met except thickness The most restrictive requirement for thickness of layers must be met

32 3-6 inches meets F6 Redox Dark Surface, but thickness requirement is 4 inches 6 to 10 inches meets F3 Depleted Matrix requirements, but thickness requirement is 6 inches Add the 3-6 inch and 6 to 10 inch layer thicknesses together to get 7 inches which is thicker than the most restrictive requirement of 6 inches

33 0 to 3 inches meets F6 Redox Dark Surface, but thickness requirement is 4 inches 3 to 6 inches meets S5 Sandy Redox, but thickness requirement is also 4 inches Combine the thickness of the 2 layers to get 6 inches

34 Dig a hole to 6 in. Do organic soil materials or mucky modified layers exist? Does chroma 2 exist? Are there any distinct or prominent redox concentrations as soft masses or pore linings? Is there a hydrogen sulfide odor? Are you in a depression, on a floodplain, in red parent material or within 200 m of an estuarine marsh and 1 m of mean high water? If answer is no to all questions, the soil will not meet an indicator.

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36 F8. Redox Depressions In CDs subj. to ponding, 5% or more redox conc. in a layer 2 cm or more thick entirely within upper 15 cm.

37 Chroma less than 4 and 20 percent or more redox concentrations

38 Within 200 m of estuarine marshes or waters and within 1 m of mean high water Chroma less than 5 and 10 percent redox concentrations

39 F3. DEPLETED MATRIX F21. RED PARENT MATERIAL

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41 Saturated, Ponded, or Flooded conditions Water table measurements Well and piezometers Reducing Conditions Redox potential measurements Reduced Iron (Fe II) measurements Alpha-Alpha Dipyridyl IRIS tubes In-situ pH measurements On-site precipitation data Replicates

42 I am in the process of updating to delete obsolete tech. notes and provide more complete and up-to-date info on hydric soil issues. If there is any info you would like to see on the page let me know.

43 National Wetland Condition Assessment EPA Potential Wetland Landscapes Map based on gridded SSURGO Association of State Wetland Managers Wetland Mapping Consortium

44 NEDC Courses Advanced Hydric Soils – Meridian, MS August 20 – 25 th, 2012 SSSA Hydric Soils Field Tour Cincinnati, OH, Saturday, October 20, 2012

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