Table 22. Monthly distribution of measured annual flood peaks at key stations along Paraguay and Paraná rivers.1 River at No. of Monthly distribution (percentile) Station (location) years Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May Jun. Jul. Aug.                     Upper Paraguay river at Cáceres (Km 3442)2 20 0 0 0 0 5 40 504 5 0 0 0 0                     Upper Paraguay river at Ladario (Km 2755)2 96 0 0 0 0 0 0 2 11 24 41 21 1                     Upper Paraguay river at Porto Murtinho (Km 2235)2 46 2 4 0 2 2 0 4 7 22 20 20 17                     Middle Paraguay river at Asunción (Km 1630)2 87 2 5 3 6 13 7 2 5 17 29 10 1                     Upper Paraná river at Posadas (Km 378)3 92 2 5 6 9 18 19 18 6 5 10 2 0                     Middle Paraná river at Corrientes (Km 1208)2 92 1 3 1 12 8 23 25 9 3 11 4 0 1Source: Anderson et al (1993) and DNAEE/CPRM (unpublished data). 2 Km of Hidrovia, starting at Buenos Aires. 2 Distance measured from Corrientes. 4 Bolded figures indicate the mode (the largest value) of the distribution.