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Abstract
The Orinoco river basin (Colombia) is characterized by its ecological, social and cultural diversity. This region is also very dynamic in terms of oil exploration and extraction because these activities are developed in almost 75% of its extension, which has resulted in important impacts on the water resources. Decree 1900 of 2006 establishes the “mandatory investment of the 1%” as an environmental requirement for the protection of the water resources in the country. This measure compels the licensed projects to invest 1% of their budget on preservation and conservation actions in the water basin they use for water supply. However, the impacts of this measure have not been meaningful in this region. With the aim of assessing the actual state and perspectives of these investments, the environmental files associated to hydrocarbon exploration and exploration from 2001 and 2014 in the Manacacías river basin and other related secondary sources were reviewed. The analysis allowed identifying the main factors that have blocked the adequate investment of those resources and revealed the need of reformulating and adjusting this environmental requirement.





