&bu1=View onto Lago Descoberto. (photo: P. Röser/UFZ) &
&bu2=Slum in Brasília. (photo: Prof. H. Weiß/UFZ) &
&bu3=Water treatment facility at Rio Descoberto. (photo: Prof. H. Weiß/UFZ) &
&bu4=Water fall Salto do Itiquira near Formosa northeast of Brasília. (photo: Prof. H. Weiß/UFZ) &