As características físicas, químicas, mineralógicas e hidráulicas do solo e sua susceptibilidade ao processo de terras caídas: Comunidade do Divino Espírito Santo Iranduba/AM

Abstract

Large part of the soil is, constantly, mobilized from the margins to the inside of the Solimões River, actuated by the natural process of and involves physical and hydrological factors, coming to cause changes in the relief of the community Divino Espírito Santo, in Iranduba - AM. This work was aimed not only to analyze the process of earth falls in this community, through the extensive scars during the period July 2010 to September 2011, as well as describe variables physics, chemistry, mineralogical and soil hydraulic and monitor the fluviometry and pluviometry in the area. The methodology was based on a systemic approach, based on the following methodology: monitoring the scars lifting by ordenadas, piezometry, pluviometry, fluviometry, tests of infiltration, physical analysis, chemical, mineralogical and hydraulic soil (granulometric, organic matter, apparent density, real density, microporosity, macroporosity, total porosity, macronutrients, micronutrients, carbon and difratometry X-rays). The results of the study have led to the conclusion that earth falls, besides being a regional terminology, is a natural process that corresponds to different mass movements, mainly the rotational slip and block fall, acting in different periods of the river (flood and ebb). The occurrence of this process does not depend on the shape of the margins of the river and the type of geomorphological unit, because the main factor in determining the Earth Falls is the susceptibility of the soil, whose variables verified commanding the stability of ravine, thus generating different mass movements.