干旱区生态环境知识资源中心(Arid): Hydrological behaviour of vertisols in the Brazilian semi-arid region: the importance of rainfall of less than 30 mm

Arid

DOI	10.5935/1806-6690.20200029
	Hydrological behaviour of vertisols in the Brazilian semi-arid region: the importance of rainfall of less than 30 mm
	de Andrade, Eunice Maia 1; Rodrigues, Rafael do Nascimento 2; de Queiroz Palacio, Helba Araujo 3; Brasil, Jose Bandeira 2; Simas Guerreiro, Maria Joao 4
通讯作者	Brasil, Jose Bandeira
来源期刊	REVISTA CIENCIA AGRONOMICA
ISSN	0045-6888
EISSN	1806-6690
出版年	2020
卷号	51 期号:2
英文摘要	The greater probability of small rainfall events occurring in semi-arid regions, and the little understanding of their role in hydrological processes, has led to this investigation of surface runoff generated during these events in two adjacent micro basins in the Brazilian semi-arid region. The types of plant cover to be investigated were the Phytogeographical Caatinga Domain under regeneration for 35 years (CPDReg) and thinned CPD (CPDThin), which consisted of the elimination of trees with a diameter of <10 cm. Two historical series were considered, one of 40 years (1974-2013) with 2,259 events and the other consisting of 247 rainfall events of <30 mm from 2009 to 2013. The cumulative frequency distribution showed that the series of 247 24-hour events proved to be statistically representative in investigating hydrological processes in the Brazilian semi-arid region, compared to the long series of 2,259 events. Irrespective of the pattern, rainfall with an intensity of less than 17 mm h(-1) generated effective precipitation with small depths (<2 mm). Regardless of the rainfall pattern, the lowest effective precipitation was registered for the plant cover of thinned CPD, both on an annual scale and per event. The occurrence of 3 or 4 consecutive dry days is enough for events of <30 mm to generate no runoff, due to the appearance of micro-cracks formed in vertisols during the drying process. It is believed, therefore, that the expansion and contraction of vertic soils is the main determinant for the start of Pe in areas with a water source (micro basins of <2 ha) in the CPD.
英文关键词	Eco-hydrological processes Seasonally Dry Tropical Forest Thinning Surface runoff Rainfall patterns
类型	Article
语种	英语
国家	Brazil ; Portugal
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000542212500001
WOS关键词	LAND-USE ; RUNOFF ; SOIL ; PRECIPITATION ; WATERSHEDS ; RESPONSES
WOS类目	Agriculture, Multidisciplinary
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319767
作者单位	1.Univ Fed Rural Semiarido UFERSA, Dept Conservacao Solo & Agua, PQ-1A, Mossoro, RN, Brazil; 2.Univ Fed Ceara UFC, Dept Engn Agr, Campus Pici, Fortaleza, Ceara, Brazil; 3.Inst Fed Ceara, Dept Educ, Iguatu, CE, Brazil; 4.Univ Fernando Pessoa, FP ENAS, Praca 9 Abril,349, Porto, Portugal
推荐引用方式 GB/T 7714	de Andrade, Eunice Maia,Rodrigues, Rafael do Nascimento,de Queiroz Palacio, Helba Araujo,et al. Hydrological behaviour of vertisols in the Brazilian semi-arid region: the importance of rainfall of less than 30 mm[J],2020,51(2).
APA	de Andrade, Eunice Maia,Rodrigues, Rafael do Nascimento,de Queiroz Palacio, Helba Araujo,Brasil, Jose Bandeira,&Simas Guerreiro, Maria Joao.(2020).Hydrological behaviour of vertisols in the Brazilian semi-arid region: the importance of rainfall of less than 30 mm.REVISTA CIENCIA AGRONOMICA,51(2).
MLA	de Andrade, Eunice Maia,et al."Hydrological behaviour of vertisols in the Brazilian semi-arid region: the importance of rainfall of less than 30 mm".REVISTA CIENCIA AGRONOMICA 51.2(2020).