tailieunhanh - Evapotranspiration covers for landfills and waste sites - Chapter 2

Chương này mô tả việc áp dụng bao gồm (Còn được gọi là mũ) là thành phần của bãi rác khắc phục. Các thành phần khác, bao gồm bộ sưu tập khí bãi rác và sử dụng, thu nước rỉ rác và điều trị, điều khiển thủy lực của nước ngầm, và khắc phục ô nhiễm nước ngầm và nước mặt đang Bàn luận tại chiều dài của các tác giả Nhiều (ví dụ, 1991 USEPA, Dunn và Singh năm 1995; McBean và al 1995;. Koerner và 1997 Daniel, Gill và cộng sự năm 1999;. Weand et al 1999) Bao. | 2 Landfill Remediation with Covers This chapter describes the application of covers also called caps as components of landfill remediation. Other components including landfill gas collection and disposal leachate collection and treatment hydraulic control of groundwater and remediation of contaminated groundwater and surface water are discussed at length by numerous authors . US EPA 1991 Dunn and Singh 1995 McBean et al. 1995 Koerner and Daniel 1997 Gill et al. 1999 Weand et al. 1999 . Landfill covers are used at various times during a site s active life. At modern landfills a thin soil layer or other cover is placed over the waste at the end of each day to control odors prevent litter movement by wind and keep rodents birds and insects out of the waste. Intermediate soil covers protect inactive areas of an active landfill. McBean et al. 1995 present a more complete discussion of daily and intermediate landfill covers. Landfill remediation includes a final cover it remains in place as a part of the containment system. This book focuses on final covers they are the most frequently required and are often the most complex and costly component of landfill remediation. In the context of remediation within this book the word cover means a final landfill cover. This chapter contains a review of requirements for remediation risk-based remediation the site-specific environment conventional and alternative covers and cover selection. REQUIREMENTS FOR LANDFILL COVERS There are fundamental scientific and technical reasons for placing a cover on a landfill. Regulations control the selection and design of landfill covers however they are based on specific environmental concerns and have a technical basis. Landfill covers provide several environmental benefits but they have three primary goals Minimize infiltration into the waste and percolation from the waste to groundwater Isolate the wastes from receptors and control their movement by wind and water Control landfill .