Monitoring of Natural Attenuation in a Heterogeneous Aquifer

For exploration, monitoring and evaluation of (enhanced) natural attenuation processes it is important to imderstand the possibilities and restrictions of the common monitoring systems such as (multi-level) sampling wells, dosimeters or immission calculations. The influence of heterogeneity on sampled concentrations in a given observation well has already been demonstrated in Section 9.2.2, now we will focus on the problem of installation of a set of sampling wells to measure the concentrations in the subsurface as accurately as possible. 

The concentrations in the virtual aquifer calculated in the previous example (Fig. 9.4) will be investigated by different regular arrangements of observation wells. The measured concentrations within the sampling wells are interpolated by SURFER using the Kriging-method with default parameters. The resulting interpolated concentration pattern is compared to the real concentrations of the virtual aquifer. This comparison is impossible in natural aquifers since the real concentrations are not known. 

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