Larsen, M.C., and Wieczorek, G.F., 2006, Geomorphic effects of large debris flows and flash floods, northern Venezuela, 1999: Tropical Geomorphology with Special Reference to South America, Latrubesse, Edgardo, ed., Zeitschrift für Geomorphologie Suppl. Vol. 145, pp. 147-175.
I can email a pdf version upon request. Also see:
http://pr.water.usgs.gov/public/venezuela/index.html