Propriedades do solo da bacia hidrográfica do Rio Catorze que intensificam a erosão laminar

Abstract

This study was developed aiming to estimate the susceptibility to soil erosion of Catorze River watershed, in the municipality of Francisco Beltrão - PR. Samples were collected throughout the basin in the surface horizon, and subsequently developed particle size analysis. Based on the results of the analysis, we used the equation developed by Denardin (1990), which considers the levels of aluminum oxide, sand and organic matter, and the permeability of the soil, and found values of the K factor (erodibility). Through the Spring software 5.1.8, the soils were classified Basin, and using LEGAL program was given the values of K for soils classified, resulting in a rectangular grid with the values of the erodibility factor of the entire basin. Was produced letters soil classification and erodibility of the factor with the aid of software Scarta 5.1.8. The equations for estimating erodibility factor values depend on the physical, chemical and biological properties of soils and are developed in order to minimize mistakes and get closer to an actual value of the factor K. The values found for the factor in erodibility Catorze River watershed range between 0.0611 and 0.1238 t ha-1.h.mm-1.ha.MJ-1, showing a high erodibility, especially for neossolos, soils that are less developed. These values for the K-factor shows the need for an adjustment in the use and conservation practices throughout the basin, using for this, the map of erodibility developed through GIS, where you can view the areas most susceptible to erosion and may apply control and prevention of erosion.