pre-purification of surface water, which is then pumped into the deep subsoil, below
large clay layers (see Box 15.1). Drinking water could then be collected from this
new water reservoir when needed. The use of such subsoil reservoirs led to much
smaller water level fluctuations in the local, more superficial hydrological systems,
and enabled successful restoration of affected dune slacks.
Box 15.1 Change in drinking water production techniques in the Dutch dune areas. The first
image shows the traditional method of drinking water production (changed after Stuyfzand
1994). The second shows the improved ‘‘deep infiltration’’ method (see text). The clay layer,
indicated on the right, lies beneath the whole system
15 Restoration of Dune Vegetation
237
large clay layers (see Box 15.1). Drinking water could then be collected from this
new water reservoir when needed. The use of such subsoil reservoirs led to much
smaller water level fluctuations in the local, more superficial hydrological systems,
and enabled successful restoration of affected dune slacks.
Box 15.1 Change in drinking water production techniques in the Dutch dune areas. The first
image shows the traditional method of drinking water production (changed after Stuyfzand
1994). The second shows the improved ‘‘deep infiltration’’ method (see text). The clay layer,
indicated on the right, lies beneath the whole system
15 Restoration of Dune Vegetation
237