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18:59 Feb 14, 2006
Spanish to English translations [Non-PRO] Geology / geology, biolology
Spanish term or phrase:el cauce principal del río
Contexto: resultados permiten afirmar que el cauce principal del río no esta contaminado y puede definirse como un río limpio
well, you know your context best. A "riverbed" (one word) is a channel of a river according to Merriam-Webster's www.m-w.com. Google both "river's channel" and "contaminated riverbed" and see what you find ... Good luck!