Table 12. Selected hydrologic data at gaging stations along Upper Paraguay river.1 Station Drainage Channel Minimum Channel Mean annual area1,6 length2,4 observed slope5 discharge3,6 water level1 (km2) (km) (m) (cm/km) (m3/s)    Cáceres 33 860 - 110.09 - 382    Descalvados 48 360 139 101.00 6.54 437    Porto Conceição - 121 93.55 6.16 341    Bela Vista do Norte - 135 89.80 2.78 144    Refúgio das Três Bocas - 53 88.14 3.13 -    Amolar - 28 87.63 1.82 943   Porto São Francisco 243 0007 58 85.12 4.33 1046   Ladario - 153 81.54 2.34 1261    Porto da Manga 316 0007 69 80.12 2.06 1340   Porto Esperança 363 5007 58 78.36 3.03 1412   Forte Coimbra - 67 76.91 2.16 1467    Barranco Branco 453 000 239 72.64 1.79 1505    Fecho dos Morros 470 000 51 71.78 1.69 1549    Porto Murtinho 474 500 36 71.48 0.83 1555    Confluence with Apa River 496 000 63 - - 1565 8 1 Source: DNOS (1974) and DNAEE. 2 Source: INTERNAVE (1989). 3 Source: EDIBAP (1979). 4 Measured from upstream station. 5 Based on channel length and minimum observed water levels, calculated from Table 2. 6 If not shown, not precisely definable. 7 Small portion cannot be precisely defined. 8 Estimated by linear extrapolation from measured values at Porto Murtinho and Fecho dos Morros.