ESTIMATE OF EROSION IN BASIN OF BOARD INDIGENOUS LAND IN BRAZILIAN AMAZON

Auteurs

  • ALYSSON BUENO FRANCISCO UNESP

DOI :

https://doi.org/10.48025/ISSN2675-6900.v5n2.2024.620

Mots-clés :

deforest, land cover, soils

Résumé

The region of the Arinos River, a tributary of the Tapajós River in the Brazilian Amazon, has had areas of deforestation since the 1970s, with activities without rational use of soil. The deep and sandy soils of the Amazon region become susceptible to erosion due to the action of compaction of the cattle herd implanted after deforestation. The water erosion has serious impacts on the equatorial climate region, with erosivity in the order of 14,000 MJ.mm/h/ha/year. The objective of the research was to estimate the rate of erosion in a basin with 1 million hectares, located in an area of deforestation in the Amazon Forest. A geographic database was developed in a geographic information system to map land cover areas, slopes and soil types. From the application of the Universal Equation of Soil Losses, the indices of the factors related to the areas contained in the watershed were used. The result was an estimate of approximately 150,000 tons/hectare/year, with the production of 24 million tons of sediments.

Références

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Publiée

2024-04-11

Comment citer

BUENO FRANCISCO, A. (2024). ESTIMATE OF EROSION IN BASIN OF BOARD INDIGENOUS LAND IN BRAZILIAN AMAZON. William Morris Davis - Revista De Geomorfologia, 5(2), 1–8. https://doi.org/10.48025/ISSN2675-6900.v5n2.2024.620