Geoscience Reference
In-Depth Information
1800
1600
1400
1200
1000
800
600
400
200
0
Linear (Precipitation)
Clear-felling
Precipitation
Water yield
Figure 5.1
Measurements of precipitation and water yield from a small experimental catchment in the Paraiba River
valley, Brazil.
Eucalyptus saligna
was planted on former pasture land in 1988 and clear-felled in 1993-1994 (after Vital
et al
., 1999).
700
600
500
400
300
200
100
0
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Mean stream flow before clear-felling (1991-1997)
Stream flow after clear-felling (1997-1998)
Figure 5.2
Accumulated average monthly stream-flow values for the Itatinga experimental catchment, Brazil. During
1991-1997 the catchment was covered with coppice re-growth (approximately 17 years old) from
Eucalyptus saligna
planted about 50 years previously; this regrowth was clear-felled in 1997 (after C amara and Lima, 1999).
