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原文传递 PERFORMANCE SPEOFICATIONS FOR WOOD WASTE MATERIALS AS AN EROSION CONTROL MULCH AND AS A FILTER BERM

题名：	PERFORMANCE SPEOFICATIONS FOR WOOD WASTE MATERIALS AS AN EROSION CONTROL MULCH AND AS A FILTER BERM
作者：	Kenneth R. Demars and Richard P. Long
关键词：	wood waste, erosion control, mulch, specifications, filter berm, properties, filtration
摘要：	The filtration properties of wood waste mulch were evaluated for use in an erosion control berm application. Four wood waste materials were subjected to laboratory testing to determine their hydraulic properties in the unaltered state and the modified state. The modifications consisted of adding small particles to the grain-size distribution of the wood waste. The filtration behavior of these materials was evaluated for the 1-D condition in a permeameter and for the 2-D flow condition in a sloping Plexiglas box. The 2-D tests simulated field use of wood waste as an erosion control berm. The tests used a series of glass beads of known size and an erodible soil from the field test site, consisting of a silty fine sand, which was mixed with water and passed through the test apparatus. The suspended solids content of the effluent was used as a measure of filter effectiveness. The results of this study and the earlier phases were used to prepare model procurement specifications for wood waste material as erosion control mulch and as erosion control filter berm, which are appended to the report.
报告类型：	科技报告