CCZO -- Soil Texture -- Argillic Horizon -- Calhoun CZO -- (2016-2017)

Authors:

Rachel C. Ryland

Owners:

CZO Calhoun CZO National

Type:

Resource

Storage:

The size of this resource is 5.1 MB

Created:

Nov 19, 2019 at 7:14 a.m.

Last updated:

Jan 12, 2021 at 8:13 p.m.

Citation:

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Abstract

Historic agricultural practices throughout the Piedmont region of the southeastern United States from ~1820 to 1940 led to accelerated erosion. Practices, such as tilling, degraded soil quality altering hydrologic processes on the landscape by limiting infiltration and leading to overland flow and erosion. Erosion due to these practices has substantially redistributed sediment from upper to lower landscape positions, causing a change in the depth-to-argillic horizon along hillslopes. By mapping the depth to argillic horizon within watersheds that have a history of farming and watersheds with little evidence of agricultural disturbance, a better understanding of the effects of farming practices on erosion and sediment redistribution can be made. This study uses extensive soil sampling within historically farmed and unfarmed watersheds to map spatial variations in the depth to argillic horizon. In addition to sampling, Electro-magnetic Induction (EMI) is being tested and calibrated to clay content and other topographic characteristic (i.e. landscape position, aspect, percent slope) from which the depth to argillic horizon can be predicted. Current hillslope and watershed hydrologic models use characteristics from soil classification maps for parameterization, however, these soil maps may lack sufficient spatial detail and may not accurately represent landscapes that have been eroded from historical farming. The results from this study will improve understanding of previous erosion on sediment redistribution and will characterize the potential use of electromagnetic induction as an accurate and efficient means to predict the depth to the argillic horizon. This information will improve parameterization of hillslope and watershed hydrologic models.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Calhoun CZO Research Area 2, Calhoun CZO Research Area 3, Calhoun CZO Research Area 4, Calhoun CZO

North Latitude

34.6479°

East Longitude

-81.4128°

South Latitude

34.3634°

West Longitude

-81.9622°

Temporal

Start Date:	01/30/2016
End Date:	03/15/2017

Streets Terrain Satelite

Spatial Extent

Content

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Additional Metadata

Name	Value
czos	Calhoun
czo_id	5982
keywords	Argyllic, Clay, Depth, Soil Texture, Slope, Aspect, Landscape Position, EMI
variables	Slope(%), Aspect(degree), Tile Push Probe Depth(cm), Depth to Bt, Landscape Position, Clay(%), Sand(%), Silt(%), EMI
disciplines	Soil Science / Pedology

How to Cite

Ryland, R. C. (2021). CCZO -- Soil Texture -- Argillic Horizon -- Calhoun CZO -- (2016-2017), HydroShare, http://www.hydroshare.org/resource/116fa5ba5645479ea670cf5b5a7f2635

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

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