Theoretical travel times are given for a solute to reach a well from an injection point, for wells that fully penetrate confined aquifers of constant thickness and mainly constant conductivity and porosity. Solute is assumed to move along streamlines with the water in piston flow under steady flow conditions. Three cases are considered. For a 'standard' well of external radius of influence (r sub e) and well radius (r sub w) travel time varies approximately directly as the square of the distance r of the injection point from the well, as the ratio f/K of porosity to conductivity, and as ln (r sub e)/(r sub w). For a well in which the flow region is divided by radius (r sub c) into two regions, with the region next to the well clogged and of very low conductivity (K sub I), the travel time varies approximately directly as (r sub 2), as f/(K sub I), and as ln (r sub c)/(r sub w). For a well being fed from a line drive (river) at a distance d from the well, the travel time from a point on the line drive to the well varies as (d sup 2), as f/K, as ln 2d/(r sub w), and as a function of the position of the point along the line drive.
Travel Times of Solutes to Wells
1977
52 pages
Report
No indication
English
NTIS | 2010
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