January 2014, Vol. 241 No. 1

Features

Crossing Invisible Rivers: Seasonal Floods And The Risk Of Pipeline Exposure

The hydrological regime in the Brazilian northeast is variable. There have been in the past many cases of pipeline exposure due to huge seasonal water flow in places where, during dry periods, it’s impossible to even identify the existence of a river. The Petrobras Reabilitações do Nordeste (REAB) Project aimed to analyze a 15-year-old natural gas pipeline network in northeastern Brazil and intervene wherever the operational conditions were considered unsatisfactory. The main points of attention were river crossings. Studies were executed in different phases. In the first phase, executed throughout 2007, 39 rivers were studied. In the second phase, between Ma

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