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标题：CONTRIBUIÇÃO DA ATIVIDADE GARIMPEIRA DIAMANTÍFERA NA INTENSIFICAÇÃO DAS FRENTES EROSIVAS LINEARES POR VOÇOROCAMENTO NA SERRA TEPEQUÉM – RORAIMA
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作者：Luiza Câmara BESERRA NETA ; Marcondes Lima COSTA ; Maurício da Silva BORGES 等
期刊名称：Revista ACTA Geográfica
印刷版ISSN：1980-5772
电子版ISSN：2177-4307
出版年度：2007
卷号：1
期号：1
页码：83-93
DOI：10.5654/actageo2007.0101.0005
出版社：Editora da Universidade Federal de Roraima (EdUFRR)
摘要：In the plain intermontana of the mountain of Tepequém in the state of Roraima happens the development of lineal erosive features in the ravinas form and voçorocas that it is evidenced in the local landscape by the intensity of the erosive process. Those erosive fronts for voçorocamento might have been intensified by the human action, mainly for the activity extraction of diamonds that integrated into the scenery of the mountain of Tepequém since 1937, practiced along the decades in the rivers Paiva and Cabo Sobral, in the alluvia and secondarily in elúvios and coming colúvios of Formação Tepequém's sediments. Because of the nature sandy siltosa and incoesa of the soils that form the surface of the plain intermontana Tepequém, submitted to a sheet shallow freático and a tilted relief, besides the low density of vegetable covering (gramíneas and isolated bushes) in the top of the mountain, he/she leaves the most exposed soil to the erosive action of the rain, facilitating the transport of the superficial material and below the surface, taking to the establishment of great voçorocas.
关键词：Mountain Tepequém - mine of diamonds - voçorocas.