Resumo

LOPEZ-PEREZ, Adolfo; MARTINEZ-MENES, Mano R.  e  FERNANDEZ-REYNOSO, Demetrio S.. Prioritization of Intervention Areas using a Morphometric Analysis and Vegetation Index. Tecnol. cienc. agua [online]. 2015, vol.6, n.1, pp.121-137. ISSN 2007-2422.

Morphometric characterizations and the Normalized Difference Vegetation Index (NDVI) can be used as a strategy for the environmental hydrological restoration of basins, since identifying the interrelation among the area, shape, topography, drainage system and changes in vegetation due to anthropogenic factors enables prioritizing the application of productive-conservation interventions in sub-basins. The purpose of this is to reduce the growth of drainage systems in regions with extreme meteorological events that cause landslides and flooding in lower portions of basins. The study was performed in the Huehuetan River Basin located in the Soconusco region of the state of Chiapas, Mexico. Its objective was to estimate the morphometric parameters (linear and shape) of 16 sub-basins, as well as the NDVI for the years 1993 and 2013, in order to prioritize changes in vegetation cover that affect the degradation of the soil in the sub-basin, for the purpose of hydrological restoration. The methodology enabled defining the order of intervention (water and soil conservation practices and sediment control works) in the sub-basins so as to reduce hydric erosion, the growth of the drainage system and the transport capacity of surface flow through hillsides and rivers.

Palavras-chave : NDVI; watershed; conservation; LandSat; remote sensing.

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