Influence of variable topsoil replacement depths on soil chemical parameters within a coal mine in northeastern Wyoming, USA

Journal Article · Fri Oct 15 04:00:00 EDT 2004 · Arid Land Research and Management

DOI:https://doi.org/10.1080/15324980490497384· OSTI ID:20534983

Schladweiler, B K; Vance, G F; Legg, D E; Munn, L C; Haroian, R ^[1]

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1. University of Wyoming, Laramie, WY (US). Dept. of Renewable Resources

Uniform topsoil replacement depths on coal mine reclaimed areas have been mandated by USA federal and state regulations; however, soils of the premine landscape are not naturally uniform in depth and vary in physical, chemical, and biological characteristics. In addition, uniform topsoil depths may actually hinder the development of diverse reclaimed plant communities. We studied the effect of varying topsoil replacement depth treatments (15, 30, and 56 cm) on soil and backfill pH, electrolytic conductivity (EC), and sodium adsorption ratio (SAR) within a reclaimed coal mine study area. Backfill material (also known as spoil) at this site did not possess levels of pH, EC, and SAR that were detrimental to plant growth. There was only a slight reduction in pH, EC, and SAR within the upper 15 cm depth in the reclaimed topsoil treatments with a general increase of EC and SAR in the lower portion of the replaced soil profile. Some downward movement of soluble salts within the reclaimed treatments was evident despite low precipitation. For examples, SAR in the 0-15 cm depth over all reclaimed treatments was lower in 2002 than 2000-2001, and the 0-30 cm portion of the reclaimed soil profile had reduced pH and EC, while the 30-60 cm portion had increased EC and SAR. It is anticipated that soil quality differences in terms of pH, EC, and SAR between topsoil depth treatments will be enhanced with time. Comparison of the reclaimed area to the native reference areas suggested numerous depth differences as a result of homogeneity of the replaced topsoil vs. undisturbed soil profiles.

• OSTI ID: 20534983
• Journal Information: Arid Land Research and Management, Journal Name: Arid Land Research and Management Journal Issue: 4 Vol. 18; ISSN 1532-4982
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
ADSORPTION
BACKFILLING
COAL MINES
DEPTH
ELECTRIC CONDUCTIVITY
ELECTROLYTES
LAND RECLAMATION
PH VALUE
PLANT GROWTH
REVEGETATION
SODIUM
SOIL CHEMISTRY
SOILS
SPOIL BANKS
SURFACE MINING
USA
WYOMING