Introduction to Basic Ground-Water Transport
 
By the earthDr!
 
Late Stage Plume Splitting
 
This first figure illustrates splitting a plume of dissolved product contamination into two discrete plumes. The splitting of the plume is possible provided that two conditions can be achieved or met. The conditions to be achieved or met include the following: the capture zone boundaries exceed the downgradient extent of the source-recharge area (this includes the requirement that no separate phase contamination extends beyond the boundary of the capture zone as a consequence of the strict definition of the source-recharge area); and, the capture zone boundary exceeds the transverse-lateral extent of the plume (it is larger than the width and depth of the plume). In this second
figure, a greater time has elapsed with the plumelet migrating a greater distance downgradient. Note that the areal extent of the plumelet has decreased due to such ongoing physical phenomena as contaminant breakdown and mixing of the plume with clean ground water. These figures illustrate the principle that the pumping of ground water can influence clean ground water to exhaust previous locales of ground-water contamination. We will shortly describe those situations where hydraulic control can be used to re-direct clean ground-water to flow into and through those soil pores, beyond and downgradient of the capture zone, containing dissolved phase contamination.
 
 
 
 
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