Estimativa da erosividade das chuvas e perda de solo do município de Ipueiras - RN.

Abstract

Water erosion in tropical regions tends to be more intense, precisely because of the climate dynamics, which is worse when it comes to semi-arid regions. The study of soil losses can shed light on the idea of how much an environment degrades over time due to the action of climatic factors, mainly through precipitation. Precipitation is the basis of the rainfall erosivity parameter, which can be estimated from a historical series. In this context, this work aimed to determine the erosivity of rainfall in the municipality of Ipueira - RN, as well as to estimate soil losses under different conditions of land use and occupation. The historical series of precipitation was obtained from the website of the Empresa de Pesquisa Agropecuária do Rio Grande do Norte and consisted of data from 1980 to 2022. The soil loss estimate was performed using the Universal Soil Loss Equation (𝐴 = 𝑅𝐾𝐿𝑆𝐶𝑃), It was observed that the erosivity reached the value of 6,420.1 MJ.mm.ha-1h-1year-1, while the soil loss was estimated at 0.42; 2.08 and 0.02 t.ha-1.year-1, for land use and occupation agriculture, exposed soil and Caatinga vegetation, respectively. Therefore, the estimation of soil losses can help in the planning and definition of measures to mitigate soil losses in the municipality of Ipueira-RN.