Field evaluation of resistivity sensors for in situ moisture measurement in a bioreactor landfill

Case study of landfill leachate recirculation using small-diameter vertical wells

“…Systems for moisture addition, air injection (air injection experiments in this site were reported by Powell (2005) and Powell et al (2006)), gas extraction, as well as a range of instruments, were installed as part of research to examine several technical aspects of full-scale bioreactor landfill operation. More information on the bioreactor landfill and related infrastructure can be found elsewhere (Jain, 2005;Jain et al, 2005Jain et al, , 2006Powell et al, 2006;Kumar et al, 2009;Jonnalagadda et al, 2010).…”

“…A series of resistivity-based and time domain reflectometry sensors were installed between rows of the wells and at depths of 4.5, 9, and 15 m to monitor the in-situ moisture content before the EGC cap installation. An evaluation of these sensors and moisture monitoring results were reported by Kumar et al (2009) andJonnalagadda et al (2010). Construction photographs of sensor packs are presented in Figs.…”

“…Results from various experiments at the site have been reported previously (e.g., estimating in-situ air permeability and hydraulic conductivity of http://dx.doi.org/10.1016/j.wasman.2014.07.005 0956-053X/Ó 2014 Elsevier Ltd. All rights reserved. landfill waste, Jain et al, 2005Jain et al, , 2006; assessment of in-situ moisture sensors, Kumar et al, 2009; experience with air addition, Powell et al, 2006;Ko et al, 2013).…”

Contribution of 3-D time-lapse ERT to the study of leachate recirculation in a landfill

“…Many studies have shown the effectiveness of TDR probes or neutron probes to characterise the water content of the waste (Kumar et al, 2009;Staub et al, in press). Kumar et al (2009) showed that resistivity-based sensors can be used to obtain a reasonably accurate estimate of the local moisture content.…”

“…Many studies have shown the effectiveness of TDR probes or neutron probes to characterise the water content of the waste (Kumar et al, 2009;Staub et al, in press). Kumar et al (2009) showed that resistivity-based sensors can be used to obtain a reasonably accurate estimate of the local moisture content. Imhoff et al (2007) described a neutron probe used on several occasions, but its use is not simple with the storage of the equipment and the disposal of the probe with its radioactive source being expensive and highly regulated.…”