EDAFOLOGÍA, Vol. 12 (1), pp. 9-28, 2005
EVALUACIÓN DE LA EROSIÓN HÍDRICA DEL SUELO PARA LA PLANIFICACIÓN TERRITORIAL. EJEMPLOS EN LAS REGIONES MEDITERRÁNEA Y TROPICAL HÚMEDA
L. RECATALÁ BOIX1, N. M. COSTA MAFRA1,2, J. SÁNCHEZ DIAZ1
1Departamento de Planificación Territorial, CIDE-Centro de Investigaciones sobre De- sertificación (CSIC, Universitat de València, Generalitat Valenciana), C/ Camí de la Mar- jal, S/N; 46470-Albal (Valencia). España.
2Universidade do Estado do Rio de Janeiro (UERJ). Instituto Geociencias. Laboratório de Geografia Física e Solos (LAGEFIS). Grupo de Investigação Solos-Paisagem (GISP) R. S. Francisco Xavier, 524, s/4001-D. Rio de Janeiro, 20559-900. Brasil.
This paper presents a weighting-rating method to evaluate qualitatively both present and potential soil erosion for land use planning in the Mediterranean and Tropical Rainy Regions. It has been applied in two case studies: Sagunto area (Spain) and Bom Jesus do Itabapoana (Brazil), both on a scale of 1:25.000. For Sagunto, mapping units with high or very high present soil erosion represent 12.3% of the total area, and with high or very high potential soil erosion represent 28.8% of total area. For Bom Jesus do Ita- bapoana, units with high present soil erosion represent 4.6% of total area, while with very high, 0.5%; and with high potential soil erosion represent 47.9% of the total area, while with very high, represent 7.2%. The evaluation and classification of present and potential soil erosion in the study areas have provided a basis for addressing soil conservation by defining guidelines for land use allocation.
Key Words: Erosion risk, cartography, soil conservation, Mediterranean region, Tropical region