FRAGILITY OF STRANDS: RESISTANCE PENETRATION VERSUS RATE INFILTRATION IN DIFFERENT SUBORDERS OF ARGISSOIL IN URBAN AREA OF SÃO PEDRO DO SUL / RS

Abstract

This paper examines the fragility of the slopes by testing resistance to penetration and infiltration of water in different suborders of Argissoil in the urban area of São Pedro do Sul / RS, located in the Peripheral Depression South Rio Grande. The materials used were: impact penetrometer Model IAA / Planalsucar - Stolf; Army Topographic Sheet: São Pedro do Sul HS-21-XD-VI-2, semi-detailed soil map (scale 1: 40 000 - Klamt et al. (2008)), and Trexe Garmin GPS, digital Still Camera, PVC pipe, Ruler graduated. The Argissoil suborders were analyzed Bruno Gray, Yellow and Red Podzolic Red Yellow Podzolic Latosol Abrupt in slopes of 0 - 5% and 5 - 12%, resulting in five test sites, following the methodology of Ross and Fierz (2005) and Cunha and Guerra (1996 , respectively). It can be argued that where land use was agriculture infiltration was higher, and lower resistance to penetration. Already in places used for rest of farming or ranching penetration resistance was greater and lesser infiltration.