Land use/cover typologies		Area (%)
Primary class	Secondary class	1984	1989	1994	1999	2004	2009	2014
Aquatic	River	4.64	4.11	4.19	4.28	4.37	4.39	3.10
Aquatic	Oxbow lake	2.92	2.01	2.13	1.49	0.81	0.56	0.68
Natural	Sandbars	0.40	0.53	0.43	0.51	0.55	0.19	0.98
	Marsh	26.30	29.07	29.91	26.96	23.16	23.87	18.06
	Terrestrial Vegetation	44.67	40.18	37.88	42.53	44.62	45.55	43.75
Anthropogenic	Agriculture and exposure soil	20.80	20.91	21.09	18.84	18.55	16.63	24.52
	Urban area	0.10	2.47	3.53	3.80	6.37	7.11	6.96
	Mining	0.18	0.72	0.82	1.60	1.57	1.70	1.94
Total		100.00	100.00	100.00	100.00	100.00	100.00	100.00