04.02.2013 Views

Regional Basic Professional Training Course in Korea

Regional Basic Professional Training Course in Korea

Regional Basic Professional Training Course in Korea

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

etention of radioelements by sediments.<br />

5.5.2.2. Dispersion <strong>in</strong> the groundwater<br />

General<br />

❙ 351 ❙<br />

5. SITING CONSIDERATIONS<br />

The evaluation of underground transfers (which concerns <strong>in</strong>cidental or accidental<br />

conditions) serves two purposes:<br />

It is performed with a view to prediction <strong>in</strong> the various phases of the site study;<br />

In the event of an <strong>in</strong>cidental or accidental discharge, it monitors the evolution of<br />

the pollution.<br />

It then helps determ<strong>in</strong>e the appropriate actions to m<strong>in</strong>imize the consequences, i.e., the<br />

appropriate remedial measures. It is based on collection of the follow<strong>in</strong>g ma<strong>in</strong> items of<br />

<strong>in</strong>formation:<br />

Several piezometric maps of the site, which are fundamental tools for a<br />

hydrogeological study;<br />

The hydrodynamic parameters of the aquifers (permeability, porosity), determ<strong>in</strong>ed<br />

by <strong>in</strong> situ or laboratory tests;<br />

Ground heterogeneity characteristics (existence of troughs caus<strong>in</strong>g faster<br />

preferential flows, etc.).<br />

The sorption coefficients of the medium (Kd).<br />

The hydrogeological transfer model<br />

In a first approximation, the evaluation of the transfer can be rather summary and be<br />

based only on the water velocity <strong>in</strong> the aquifer (which is <strong>in</strong> the range 10‐9 ‐ 10‐3 m/s).

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!