Evaluation of LNAPL Behavior in Water Table Inter-Fluctuate Zone under Groundwater Drawdown Condition

Water

Abdorreza Vaezihir¹  Reza Azimi¹  S.Majid Hassanizadeh²  RobertJ. Lenhard³ 

[1] Department of Earth Sciences, University of Tabriz, 29 Bahman Blvd., Tabriz 5166616471, Iran;Department of Earth Sciences, Utrecht University, 3584 CD Utrecht, The Netherlands;San Antonio, TX 78253, USA;

关键词: groundwater level fluctuations;    LNAPL;    sand tank;   

DOI  :  10.3390/w12092337

来源: DOAJ

【 摘 要 】

We investigate the movement of LNAPL (light non-aqueous phase liquid) into and out of monitoring wells in an immediate-scale experimental cell. Aquifer material grain size and LNAPL viscosity are two factors that are varied in three experiments involving lowering and rising water levels. There are six monitoring wells at varying distances from a LNAPL injection point and a water pumping well. We established steady water flow through the aquifer materials prior to LNAPL injection. Water pumping lowered the water levels in the aquifer materials. Terminating water pumping raised the water levels in the aquifer materials. Our focus was to record the LNAPL thickness in the monitoring wells under transient conditions. Throughout the experiments, we measured the elevations of the air-LNAPL and LNAPL-water interfaces in the monitoring wells to obtain the LNAPL thicknesses in the wells. We analyze the results and give plausible explanations. The data presented can be employed to test multiphase flow numerical models.

【 授权许可】

Unknown