Aplicação do NDWI para avaliar a disponibilidade de água em bacias hidrográficas


Environmental indicators are important mechanisms to get information about the state of the environment, in particular water, which is a natural resource of great importance, whose quality it depend of human activities developed in the river watershed. Therefore, this study adapted the Normalized Difference Water Index (NDWI) so that it could reflect the availability of water for the present vegetation in the Una River Watershed, using in your calculation, scientific and technical bases of geoprocessingtechniques. From the results, we found that the highest concentration of water stress in the vegetation is present in urban and agricultural areas, where vegetation have to compete with human activities for water availability. In general, the NDWI values were high, since all values are above 0.8, indicating that the study area does not suffer from waterscarcityavailable for vegetation. This indicator allows numerically interpretationofwater availability for vegetation in the Una River Watershed, and thus a fast, simple and valid alternative for assessing the sustainability of the water, and can serve as a decision-making tool for public managers and stakeholders on this issue.

SILVA, Darllan Colins da Cunha e; ALBUQUERQUE FILHO, José Luiz; OLIVEIRA, Renan Angrizani de; LOURENÇO, Roberto Wagner. Aplicação do NDWI para avaliar a disponibilidade de água em bacias hidrográficas. Revista da Universidade Vale do Rio Verde, v.15, n.1, p.774-783, jan.-jul., 2017.

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