Erodibility of fly ash-treated minesoils

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:613855

Gorman, J M; Sencindiver, J C; Singh, R N ^[1]

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1. West Virginia Univ., Morgantown, WV (United States); and others

Fly ash, a by-product of coal-fired power plants, has been used successfully in reclaiming adverse mine sites such as abandoned mine lands by improving minesoil chemical and physical properties. But, the fine sand-silt particle size of fly ash may make it more susceptible to detachment and transport by erosive processes. Furthermore, the high content of silt-size particles in fly ash may make it more susceptable to surface crust formation resulting in reduced infiltration and increased surface runoff and erosion. In the summer of 1989, fly ash/wood waste mixtures were surface applied on two separate mine sites, one with 10% slope and the other 20% slope, in central Preston County, West Virginia. Erosion rates were measured directly using the Linear Erosion/Elevation Measuring Instrument (LEMI). Erosion measurements were taken during the first two growing seasons on both sites. Erosion values were up to five times greater on the fly ash-treated minesoil than on the minesoil without fly ash cover. Mulching with wood chips reduced fly ash erosion to about one-half the loss of the unmulched plots. Erosion was related to both the amount and type of ground cover. Increased vegetative ground cover resulted in reduced erosion. Mosses and fungi appeared to provide better erosion protection than grass-legume cover.

• OSTI ID: 613855
• Report Number(s): CONF-9705128--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
ABANDONED SITES
COAL MINES
ENVIRONMENTAL EFFECTS
FLY ASH
LAND RECLAMATION
REMEDIAL ACTION
SOILS
SURFACE MINING
WEST VIRGINIA