ABSTRACT - DELIVERABLE 196 Report on the restoration success of
two lowland streams following re-meandering projects Lowland
streams are characterised by a gentle slope of terrain (zero to
five per mill) and sandy soil. They occur in the flat lowland
areas of the Western European plain. Lowland streams are fed by
rainwater; they often lack a well-defined source. Thus, their
discharge shows a smoothed relation with the amount and
frequency of precipitation in the various seasons. Lowland
streams occur in the eastern and southern part of the
Netherlands. Their current velocity varies from 5-30 cm s-1 in
summer and early autumn and from 30-60 cm s-1 in late autumn to
spring. Often the rainwater fed upper courses dry up in summer,
though sometimes they are fed by a helocrene spring and then
show a more constant discharge pattern (Verdonschot, 1990).
After a long period of adapting lowland streams and their
catchments to agricultural, domestic, drinking water and
industrial needs, awareness of the damages of these