干旱区生态环境知识资源中心(Arid): Soil pedestal dating in the degraded Salitre River basin in the northeast of Bahia, Brazil

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DOI	10.1016/j.jsames.2022.103978
	Soil pedestal dating in the degraded Salitre River basin in the northeast of Bahia, Brazil
	de Jesus, Djalma Santos; Vellame, Lucas Melo; Pereira da Silva, Alisson Jadavi; de Araujo, Jose Carlos
通讯作者	de Jesus, DS
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2022
卷号	118
英文摘要	This study evaluated possible causes of degradation of a microbasin (16 ha) in an area of the Salitre River Basin undergoing desertification, in North-eastern Brazil. Interrill erosion in the microbasin was estimated based on measurements of topography, soil erodibility, rainfall erosivity and land use and occupation. The relief was surveyed by an unmanned aerial vehicle, equipped with precision optical meter. Based on the height, position and local erosion around 53 soil pedestals, the year of their origin was estimated, given that these microstruc-tures resist erosion due to the presence of roots. The sediment yield in the microbasin is 71 Mg ha-1 per year. The dating indicates two main periods of pedestal generation: the first, during which 16% emerged, occurred in the 1960s, coinciding with the construction of an unpaved side road in the upper part of the microbasin. The second, in which 80% of the pedestals originated, dates from the 1990s, when there was intense cultivation of Agave sisalana in the region, even on the steep hillslopes. The dating also identified a significant reduction in pedestal formation during the 1980s, a period in which there was a drop in agricultural production of Agave sisalana in the region. Therefore, two development initiatives (the construction of the local road and the implantation of the Agave sisalana monoculture on the hillslopes) are the most likely factors that triggered the desertification in the area.
英文关键词	Desertification Sediment yield Interrill erosion Brazilian semiarid region
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000848654000003
WOS关键词	IMPACT ; WATER ; MODEL
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393595
推荐引用方式 GB/T 7714	de Jesus, Djalma Santos,Vellame, Lucas Melo,Pereira da Silva, Alisson Jadavi,et al. Soil pedestal dating in the degraded Salitre River basin in the northeast of Bahia, Brazil[J],2022,118.
APA	de Jesus, Djalma Santos,Vellame, Lucas Melo,Pereira da Silva, Alisson Jadavi,&de Araujo, Jose Carlos.(2022).Soil pedestal dating in the degraded Salitre River basin in the northeast of Bahia, Brazil.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,118.
MLA	de Jesus, Djalma Santos,et al."Soil pedestal dating in the degraded Salitre River basin in the northeast of Bahia, Brazil".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 118(2022).