27 research outputs found
Combined effect of established BMI loci on obesity-related traits in an Algerian population sample
Measurement of the levels of leptin, BDNF associated with polymorphisms LEP G2548A, LEPR Gln223Arg and BDNF Val66Met in Thai with metabolic syndrome
Association between polymorphisms in the adiponectin gene and cardiovascular disease: a meta-analysis
Single nucleotide polymorphism rs3774261 in the AdipoQ gene is associated with the risk of coronary heart disease (CHD) in Northeast Han Chinese population: a case-control study
Acoustic identification of the elastic properties of porous and nonporous superconducting materials DyBa 2-X Sr X Cu 3 O 7-δ
International audienc
Probing flexible thermoplastic thin films on a substrate using ultrasonic waves to retrieve mechanical moduli and density: Inverse problem
International audienc
Predicting vertical LNAPL distribution in the subsurface under the fluctuating water table effect
The present study proposes a methodology for predicting the vertical LNAPL distribution within an aquifer by considering the influence of water table fluctuations. The LNAPL distribution is predicted by combining (i) information on air/LNAPL and LNAPL/water interface elevations with (ii) the initial elevation of the water table without LNAPL effect. Data used in the present study were collected during groundwater monitoring undertaken over a period of four months at a LNAPL-impacted observation well. In this study, the water table fluctuations raised the free LNAPL in the subsurface to an elevation of 206.63 m, while the lowest elevation was 205.70 m, forming a thickness of 0.93 m of LNAPL-impacted soil. Results show that the apparent LNAPL thickness in the observation well is found to be 3 times greater than the actual free LNAPL thickness in soil; a finding that agrees with previous studies reporting that apparent LNAPL thickness in observation wells typically exceeds the free LNAPL thickness within soil by a factor estimated to range between 2 and 10. The present study provides insights concerning the transient variation of LNAPL distribution within the subsurface and highlights the capability of the proposed methodology to mathematically predict the actual LNAPL thickness in the subsurface, without the need to conduct laborious field tests. Practitioners can use the proposed methodology to determine by how much the water table should be lowered, through pumping, to isolate the LNAPL-impacted soil within the unsaturated zone, which can then be subjected to in-situ vadose zone remedial treatment