|Summary:||Permanent stemmed, flowing, sweet, salty or shallow (less than 6 m deep), are not only the most productive worldwide but those which would allow biorepair environments contaminated by sewage, tailings and petrochemicals by using their several purifying components. This research deals with the assessment of wetlands located in the Pastaza basin with potential for the purification of water bodies of the Pastaza basin polluted by hydrocarbons.The physiographic features of soils and plant communities were identified and classified; the hydrology of the study area was also classified according to the wetlands water type. A qualitativequantitative quasi experimental method was used based in four field trips from July 2007 to January 2008. GIS data allowed identification of marshlands and palm swamps as the most predominant in the study area mostly for their higher purification action which contributes to avoid direct pollution of water bodies because of oil companies activities. It is concluded that this natural phenomenon could be used as a new purification technique since results show yields between 60 -70%.|
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