Erodibilities and eroded size distribution of western Kentucky mine spoil and reconstructed topsoil
Standard erosion plots (4.6 m by 22.1 m on 9 percent slope) were constructed from shale spoil material, topsoil (A horizon) and subsoil (B and C horizon mixture) in Western Kentucky to evaluate the effects of placement technique and density on the erodibility and eroded size distribution from mine spoil and reconstructed topsoil. Plots were evaluated under fallow conditions with a tilled plot surface and under two compacted conditions. Rainfall was supplied with the Kentucky Rainfall Simulator at a rate of 63.5 mm h/sup -1/ with the plots in dry, field capacity, and very wet condition. Runoff was evaluated for flow rates, sediment concentrations, and aggregate particle size distributions. For the topsoil and subsoil plots, sediment yield was greatest for the dozer scraper pan plots and lowest for the tilled plots. For the shale plots, erosion rates from the wheeled compacter plots were the highest and tilled plots the lowest. Average erodibilities were 0.14, 0.38, and 0.41 tons ac-1 for the shale, subsoil, and topsoil plots. The accuracy of the Wischmeier erodibility nomograph was evaluated on the data collected. Erodibilities were accurately predicted for the topsoil plot and poorly predicted for the subsoil plot. The accuracy of the CREAMS procedures for predicting the composition (size distribution) of eroded particles was also evaluated. The composition was well predicted for the topsoil plots, moderately well predicted for the shale plots and poorly predicted for the subsoil plots.
- Research Organization:
- Univ. of Kentucky, Lexington
- OSTI ID:
- 5409552
- Report Number(s):
- CONF-841204-
- Journal Information:
- Univ. Ky., Off. Eng. Serv., (Bull.); (United States), Conference: National symposium on surface mining, hydrology, sedimentology and reclamation, Lexington, KY, USA, 2 Dec 1984
- Country of Publication:
- United States
- Language:
- English
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54 ENVIRONMENTAL SCIENCES
SPOIL BANKS
EROSION
FIELD TESTS
FORECASTING
KENTUCKY
MATERIALS HANDLING
MATHEMATICAL MODELS
NOMOGRAMS
PARTICLE SIZE
RUNOFF
SEDIMENTS
SLOPE STABILITY
SOIL CONSERVATION
SURFACE MINING
WATER POLLUTION
DIAGRAMS
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