Landscape erosion between Samaipata and San Juan del Rosario, Pirai river basin, Santa Cruz department, Bolivia, June 1989.

Pirai river between Villa Carmen and Jorochito, showing sedimentary rock outcrop on both banks; Santa Cruz department, Bolivia.

Pirai river near Comunidad San Jose, Santa Cruz de la Sierra, Santa Cruz department, Bolivia.

Pirai river at Ingenio UNAGRO, showing erosion on left bank, Santa Cruz de la Sierra, Santa Cruz department, Bolivia.

Entrance to the Canal Juan Latino, Pirai river basin, Santa Cruz de la Sierra, Santa Cruz department, Bolivia.

Railroad bridge spanning an old course of Pirai river, Santa Cruz de la Sierra, Santa Cruz department, Bolivia.

Flood stage in Itajai, Santa Catarina, Brazil, January, 1983.

Overflow spillway for Barragem Norte (Norte Dam), Itajai river, Santa Catarina, Brazil January 1983. Note VW bug in the center.

Side view of breached cofferdam of Barragem Norte (Norte Dam), on the Itajai river, Santa Catarina, Brazil, January 1983.

Overview of breached cofferdam of Barragem Norte (Norte Dam), on the Itajai river, Santa Catarina, Brazil, January 1983.

Close view of Morning Glory spillway, on the Barragem Norte cofferdam site, Itajai river, in Santa Catarina, Brazil. The spillway got plugged with vegetative debris (visible on the left side) during a flood event in December 1982, and led to the breach of the temporary structure (Photo by V. M. Ponce, January 1983).

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