Journal Published Online: 14 February 2019
Volume 8, Issue 1

Erosion Potential of Compacted Surface Soils for Multilayered Cover System

CODEN: ACEMF9

Abstract

Industrialization and urbanization have led to a rapid increase in hazardous and reactive wastes that need to be disposed safely. Multilayered cover systems (MLCS) are used for such waste disposal to impede contaminant interaction with the subsurface and atmosphere. Based on multiple forensic studies, soil erosion has been identified as a primary stressor of landfill covers that results in cover failure and exposure to contamination. The pinhole test is one of the most commonly adopted index tests to evaluate the erosion rate of soil. The main objective of this technical note is to measure the erosion potential of a soil at nine different compaction states and three runoffs, which correspond to three forms—rainfall-heavy, excessive, and cloudburst—that can result in significant erosion. A total of 729 pinhole tests on 9 different loamy soils were conducted in the current study, and the individual effects of initial moisture content, soil density, and runoff flow rate are discussed. It is observed that compaction of the surface layer for MLCS can be done at wet optimum moisture content with the highest possible soil density to minimize risk of erosion for all loamy soil. Furthermore, fine fractions of soils (percentage finer than 75 μm) was identified as a parameter that can be used to predict the maximum erosion rate of a soil using a simple linear relation.

Author Information

Kumar, Himanshu
Department of Civil and Environmental Engineering, Shantou University, China
Bordoloi, Sanandam
Department of Civil Engineering, Indian Institute of Technology, Guwahati, India
Yamsani, Sudheer Kumar
Department of Civil Engineering, Indian Institute of Technology, Guwahati, India
Garg, Ankit
Department of Civil and Environmental Engineering, Shantou University, China
Sekharan, Sreedeep
Department of Civil Engineering, Indian Institute of Technology, Guwahati, India
Rakesh, R. R.
Civil Engineer and Quality Assurance/Nuclear Recycle Group, Bhabha Atomic Research Centre, Trombai, Mumbai, India
Pages: 11
Price: $25.00
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Stock #: ACEM20180088
ISSN: 2379-1357
DOI: 10.1520/ACEM20180088