impact
studies focus on surface water, i.e., rainfall-runoff processes
[e.g., Christensen et al., 2004; Graham et al., 2007a; Vanr-
heenen et al., 2004], whereas Allen et al. [2004] pointed out
that fewer studies investigate the impact of climate change
on groundwater [Allen et al., 2004; Bouraoui et al., 1999;
Brouye`re et al., 2004; Jyrkama and Sykes, 2007; Loa´iciga
et al.,
2000; Scibek and Allen
/media/loftslag/vanRoosmalen_etal-2009-WRR_2007WR006760.pdf