XI WORLD FORESTRY CONGRESS

Antalya, Turkey, 13 to 22 October 1997


VOLUME 3, TOPIC 12


    CRITERIA FOR HYDROLOGIC AND EDAPHIC CHARACTERIZATION OF SOIL PREPARATION SITES PRIOR TO REFORESTATION

    J.A.Fernández1, V.Gómez2 and M.Roldán1

    The recent introduction of machinery and implements specifically designed for soil preparation tasks prior to reforestation has brought in its train the need - from the technical standpoint - to establish a methodology for appraising the characteristics of the work done with the respective kind of instrument so that objective criteria can be used in selecting the most appropriate for the purpose. The actual device will be particularly important for reforestation in Mediterranean areas with their convergence of climatic, physiographic, edaphic and plant cover characteristics, making the reforestation of such plant cover especially difficult. Among the climatic factors two aspects are critical for the design, volume and execution of soil preparation with reforestation in view. One concerns the marked annual drought, which may compromise the success of the stand, particularly in the early years when the young plants are at their most vulnerable. The other concerns the frequent heavy rains, with the intense erosion to which they may give rise, breaking up and displacing more soil than normal rain will do in the course of several years. Parameters are defined, together with the relevant measurement techniques, for characterizing the hydrologic and edaphic effects of these operations. The following order is defined: 1. Define the hyrologic and edaphic effects of soil preparation operations for reforestation purposes; 2. Establish parameters for appraising these effects; 3. Establish methods for measuring the parameters.

    Keywords: soil preparation for reforestation; runoff control; erosion control.

    1 Profesores de Hidrología Forestal.

    2 Profesor de Ecología Forestal. Escuela Universitaria de Ingeniería Técnica Forestal (Universidad Politécnica de Madrid). Ciudad Universitaria s.n. 28040 Madrid (España).



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