Prediction of soil losses and agrotechnological seizure in the Sertão Alagoano

Abstract

Accelerated soil erosion is an environmental problem related to land occupation and use and compromises production, biotic and climate regulatory functions. In the semi-arid region, the loss of productivity and the expansion of the desertification phenomenon is little associated with erosion processes and related to drought by farmers. The evaluation of erosion in the municipality of Poço das Trincheira - AL through the Universal Soil Loss Equation, relates its impact to loss of productivity and changes in use, correlating the results with data from the IBGE agricultural sense and deforestation from MapBiomas from 2010 to 2021. The predicted erosion map had an accuracy of 52% and Kappa of 35%. Laminar erosion predominates and is intensified by the inappropriate use of technologies. There is an advance in agricultural activity to the detriment of areas in the Caatinga Biome. Human activities and climate change, which may be associated, do not favor revegetation, and may lead to irreversible soil degradation and expansion of the desertification phenomenon. The perception of the soil erosion rate can help in the development of knowledge strategies for the establishment of management practices that reduce soil losses.