Table 2. Selected hydrologic data at gaging stations along the Upper Paraguay river.1 Station Drainage area3 Zero of gage4 Observed water levels (km2) (m) Minimum (m) Maximum (m) Difference (m) Alto Paraguay 780 - 0.30 4.00 3.70 Barra dos Bugres 10 240 - 0.28 5.54 5.26 Porto Estrela 12 770 - 0.95 6.18 5.23 Cáceres 33 860 109.34 0.75 4.792 4.04 Descalvados 48 360 98.70 2.30 4.91 2.61 Porto Conceição - 91.48 2.07 5.356 3.28 Bela Vista do Norte - 87.48 2.32 5.592 3.27 Refúgio das Três Bocas - 84.65 3.4 8.506 5.01 Amolar - 85.46 2.17 7.022 4.85 Porto São Francisco 243 0005 83.06 2.06 8.256 6.19 Ladario - 82.15 -0.61 6.62 7.23 Porto da Manga 316 0005 78.58 1.54 9.067 7.52 Porto Esperança 363 5005 79.66 -1.30 5.956 7.25 Forte Coimbra - 78.90 -1.99 4.672 6.66 Barranco Branco 453 000 72.45 0.19 7.846 7.65 Fecho dos Morros 470 000 71.75 0.03 6.372 6.34 Porto Murtinho 474 500 70.75 0.73 7.75 7.02 1 Source:  DNOS(1974) and DNAEE.  2 Source:  Hidrologia S.A.(unpublished). 3 If not shown, drainage area is not precisely definable. 4 Unavailable if not shown.   5 Small portion cannot be precisely defined.  6 Maximum known (1959 flood water mark). 7 Maximum known (1905 flood water mark).