Análise do potencial de erosão laminar na sub-bacia Ribeirão Ponte Alta (DF) utilizando a EUPS

Content Provider	Semantic Scholar
Author	Oliveira, Paula
Copyright Year	2018
Abstract	Several environmentally relevant areas of Cerrado biome have been destroyed or are under anthropic pressure because of the accelerated process of expansion of land occupation in the Federal District. The acceleration of soil erosion processes is one of the effects of human expansion on natural resources. The trigger of soil erosion depends on the interaction of related variables in the erosion process, as the rainfall erosivity, soils properties, geomorphological characteristics of the terrain, plant cover, and soil management. The sheet or laminar erosion begins when the energy of the flow of water surface is greater than the cohesive forces that keeps soil particles together. This type of erosion occurs in a diffuse manner without developing visible channeled flow, however, may cause significant soil loss or loss of soil productivity. This research aimed to analyze the potential of soil loss caused by sheet erosion in the Ribeirao Ponte Alta watershed especially located in the Federal District (DF) of Brazil by applying the Universal Soil Loss Equation (USLE). The USLE combined with a Geographic Information System - GIS allowed to assess the potential of soil losses under various physiographic conditions in the study area. The estimation of the annual soil loss for the study area was achieved by using thematic maps that corresponded to the components (factors R, K, LS e CP) of the USLE. Based on this study results, I estimated that the rain erosivity factor (R) for the study site is approximately 8.420,88 MJ.mm.ha-1.h-1. Most of the study area was covered by Cambissolos and Latossolos, which were assigned soil erosivity scores of 0,0217 and 0,0151 t.ha.h/ha.MJ.mm, respectively. The estimated maximum topographic factor (LS) was 39,76. I also observed that the study area was predominantly covered by different types of native vegetation alternated by mixed-farm uses and pastures. The estimated annual rate of sheet erosion was considered low although it is variable in some places because of land use and cover changes. Based on it, this study may support decision maker to define strategies of soil management and to enforce alternative land uses to reduce or mitigate the accelerated erosive processes in the study region.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://bdm.unb.br/bitstream/10483/21913/1/2018_PaulaLopesGermanoDeOliveira_tcc.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article