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- W2079318992 abstract "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.1For a “standard” well of external radius of influence re and well radius rw, the 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 re/rw.2For a well in which the flow region is divided by radius re into two regions, with the region next to the well clogged and of very low conductivity KI the travel time varies approximately directly as r squared, as KI, and as ln rc/rw.3For 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 the distance d squared, as f/K, as ln 2d/rw, and as a function of the position of the point along the line drive.In each case, the travel time is inversely proportional to he - hw, where he is the head at the radius of influence re (or at the line drive) and hw is the head at the well. In the three cases, doubling the pumping rate halves the travel time. Travel times can affect the extent of chemical changes of the solute (contaminant) during its flow to the well." @default.
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- W2079318992 date "1977-05-01" @default.
- W2079318992 modified "2023-09-27" @default.
- W2079318992 title "Solute Travel Times to Wellsa,b" @default.
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- W2079318992 doi "https://doi.org/10.1111/j.1745-6584.1977.tb03168.x" @default.
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