SESSION I-4. NAPL DISOLUTION AND PLUME FORMATION
Reading Assignment. The topic of NAPL dissolution is covered on pages 82 -101 in Chapter 2. Pages 82 - 99 present a series of quantitative tools that can be used to estimate the rate of NAPL dissolution at a field site. Written assignment I-20 below will provide guidance for reading this material.
Written Assignment: Question I-20.
Although conceptually useful, these four process-based dissolution models are likely to be too detailed for many field site applications. A more basic approach is presented on pg 99, section 2.7 which introduces the concept of the “site-scale dissolution model”. This dissolution modeling method has been adopted for use in the BIOSCREEN model which will be explained in detail later in Module I. For now please concentrate on the material on pages 99 – 104. Use the following written assignment question as a guide.
Written Assignment: Question I-21.
The remaining material in Chapter 2 (Section 2.8 and 2.9) offers useful insight into source zone issues such as “estimating source masses” and “source control and natural attenuation”. These topics are potentially useful for field applications.
The foregoing material on NAPL dissolution leads naturally into a discussion of the migration of dissolved contaminant plumes in response to ground water flow. The topic of dissolved contaminant plume migration is covered in the following session.