Resumo

NAJERA GONZALEZ, Oyolsi et al. Water erosion risk and soil loss estimation in volcanic geomorphological landscapes of Mexico. cultrop [online]. 2016, vol.37, n.2, pp. 45-55. ISSN 1819-4087.

This research work assesses erosion risk and soil loss in volcanic geomorphological landscape units from Mololoa river basin, Mexico, by applying the universal soil loss equation based on geographic information systems. Natural resources of this Nayarita territorial region have favored the economic development and establishment of this state capital; however, such relationship, lacking an environmental criterion planning, has caused their quick deterioration, mainly in soils, which in time can result in low levels of the territorial users’ well-being. According to these results, 57,6 % geomorphological landscapes of the studied area show very high and high erosion risk, corresponding to “Sierras de San Juan” and “Volcan” units, volcanic hill slopes associated with “Sangangüey” volcano and “Tepeltitic” volcano slopes. In turn, 66 % of the studied territory present some level of water erosion; 13,7 % of the basin surface have significant soil losses by water erosion (very high and high); 16,6 % show a moderate soil loss whereas 35,7 % have lost less than 10 t ha^-1 year^-1

Palavras-chave : universal soil loss equation; geographic information system; water basins; river; Nayarit.

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