중남미

The Beni basin in north-eastern Bolivia is part of the
south-western Amazon Basin. Its central part consists
of the Llanos de Moxos, one of the largest seasonally
inundated savannahs in the world (150,000 km2
)
(Boixadera et al. 2003) (Fig. 1). Fluvial and hydrological
regimes are highly variable in space and time, which
is evident in the diverse inundation patterns, large-scale
river migrations (Allenby 1988; Dumont 1996; Hanagarth
1993; Plafker 1964) and various traces of former
river courses found in the basin. Despite this rich fluvial
record, very little is known with regard to the longerterm
and modern variations of the fluvial system in the
Beni lowlands. So far, most palaeohydrological studies
in tropical South America have focused on the late
Quaternary fluvial sedimentary and geomorphologic
records along the central Amazon River and its main
tributaries; as is summarized in Latrubesse (2003).