A two-well tracer test was conducted in eastern Denmark, in which a short duration pulse of lithium chloride was injected into a recharge well and made to flow through a fractured chalk aquifer to a discharge well. The wells were 25 m apart, and the concentration of lithium arriving at the discharge well was monitored at five vertical intervals in the well for a 21-day period. The observed breakthrough curves show a sharp breakthrough front, with an arrival time that is consistent with advective transport through the fractures in the chalk. The breakthrough curves also exhibit a long tail in the falling limb, suggesting the influence of a secondary transport mechanism of diffusion into the porous matrix.
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Research Article| August 01 1993
Tracer Test in Fractured Chalk: 1. Experimental Design and Results
K. Høgh Jensen;
R. Jakobsen, K. Høgh Jensen, K. L. Brettmann; Tracer Test in Fractured Chalk: 1. Experimental Design and Results. Hydrology Research 1 August 1993; 24 (4): 263–274. doi: https://doi.org/10.2166/nh.1993.0007
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