Abstract
AbstractUse of contaminant mass discharge (CMD) or mass-flux measurements to characterize site conditions and assess remediation performance of nonaqueous phase liquid (NAPL) is becoming popular. The main objective of this study is to determine how groundwater flux variations in the source zone can affect nonaqueous phase liquid (NAPL) dissolution dynamics. In particular, the authors develop interplays among groundwater flux variations, NAPL aqueous concentration, NAPL CMD, and other source strength dynamics. A power-law functional form is used to describe groundwater flux variations in illustrating how NAPL source strength functions can be affected. The developed analytical models can capture a wide range of NAPL source zone dynamics encountered in real-world applications. The results demonstrate the significance of groundwater flux variations in influencing the NAPL source dynamics. If groundwater flux decreases with time, the CMD declines initially at higher rate, but the rate decreases at later stages...
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