干旱区生态环境知识资源中心(Arid): Hydrological and sedimentological impact of the restoration of a degraded area in a semiarid environment

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	Hydrological and sedimentological impact of the restoration of a degraded area in a semiarid environment
	de Almeida, Cicero Lima; Beserra de Oliveira, Jose Gerardo; de Araujo, Jose Carlos
通讯作者	de Almeida, CL
来源期刊	WATER RESOURCES AND IRRIGATION MANAGEMENT-WRIM
ISSN	2316-6886
出版年	2012
卷号	1 期号:1 页码:39-50
英文摘要	The objective of this paper is to assess the effects of both fallow and overgrazing on hydrological and sedimentological responses to natural precipitation. The research has been lead in the desertification area of Iraucuba, Brazil, whose soil is a typical Natric Ortic Planosol, A weak. Sixteen months of experiments have been executed in two hillslopes: a preserved (E-P - 370 m(2)) and a degraded (E-D - 468 m(2)). Both hillslopes are very close, having the same climate, soil and topography, differing only on soil use. The precipitation events showed highly irregular space-temporal pattern. The ten-year fallow practice was able to reduce by 2/3 the runoff. The smallest precipitation able to generate runoff was 7.2 mm in E-D and 8.6 mm in E-P This shows the increase of initial abstraction in the preserved area due to higher interception losses of both vegetation and litter; as well as higher moisture retention in the top layer of the soil. Contrastingly, the highest precipitation unable to generate runoff was identical in both cases (17.0 mm), once the main parameter responsible for this parameter - soil structure - is still similar despite the ten years of fallow. The recession-curve coefficient has strongly been affected by the fallow technique, reducing from 0.107 min(-1) to 0,045 min(-1), indicating the recovery of the base-flow potentiality, which enhances the runoff permanence time. The fallow hillslope yielded 83% less sediment than E-D, leading to better physical, chemical and biological properties of the soil. Therefore, the ten years of fallow were able to measurably enhance both hydrological and sedimentological responses of a degraded semiarid hillslope.
英文关键词	fallow hillslope hydrology runoff soil loss
类型	Article
语种	葡萄牙语
收录类别	ESCI
WOS记录号	WOS:000441084500008
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/330213
作者单位	[de Almeida, Cicero Lima; de Araujo, Jose Carlos] Univ Fed Ceara, Ctr Ciencias Agr, Campus Pici,Bloco 804, Fortaleza, CE, Brazil; [Beserra de Oliveira, Jose Gerardo] Univ Fed Ceara, Dept Biol, Ctr Ciencias, Fortaleza, CE, Brazil
推荐引用方式 GB/T 7714	de Almeida, Cicero Lima,Beserra de Oliveira, Jose Gerardo,de Araujo, Jose Carlos. Hydrological and sedimentological impact of the restoration of a degraded area in a semiarid environment[J],2012,1(1):39-50.
APA	de Almeida, Cicero Lima,Beserra de Oliveira, Jose Gerardo,&de Araujo, Jose Carlos.(2012).Hydrological and sedimentological impact of the restoration of a degraded area in a semiarid environment.WATER RESOURCES AND IRRIGATION MANAGEMENT-WRIM,1(1),39-50.
MLA	de Almeida, Cicero Lima,et al."Hydrological and sedimentological impact of the restoration of a degraded area in a semiarid environment".WATER RESOURCES AND IRRIGATION MANAGEMENT-WRIM 1.1(2012):39-50.