干旱区生态环境知识资源中心(Arid): Soil Erosion in Extensive versus Intensive Land Uses in Areas Sensitive to Desertification: A Case Study in Beira Baixa, Portugal

Arid

DOI	10.3390/land12081591
	Soil Erosion in Extensive versus Intensive Land Uses in Areas Sensitive to Desertification: A Case Study in Beira Baixa, Portugal
	Nunes, Adelia N.; Goncalves, Joao Pedro; Figueiredo, Albano
通讯作者	Nunes, AN
来源期刊	LAND
EISSN	2073-445X
出版年	2023
卷号	12 期号:8
英文摘要	The occurrence of long periods of drought followed by extreme episodes of rainfall and ineffective soil conservation practices are the main causes of soil erosion in the Mediterranean region. The objective of this paper is to assess and compare the hydrological and erosional responses related to land use changes in agricultural landscapes that are sensitive to erosion and that are a result of the significant replacement of traditional land uses. Such changes are characterized by the replacement of extensive olive groves associated with pastureland by intensive almond production, where deep plowing and heavy machinery are required. In each sampling site, runoff initiation, runoff coefficient, and soil loss were evaluated under simulated rainfall (55 mm h(-1)), at plot scale (0.25 m(2)), at the end of the hot and dry summer period. Slope gradient, soil texture, bulk density, soil organic matter content, soil water content, and plant cover were also determined. The results showed the impact of recently planted intensive almond orchards (IAOs) on accelerating soil erosion risk compared with the extensive traditional olive groves (EOGs), although runoff initiation and discharge are very similar between the studied land uses. The mean values recorded for soil loss and sediment concentration were 118 g m(-2) h(-1) and 12 g m(-2) h(-1) and 3.1 g L-1 and 0.7 g L-1, respectively, for IAOs and EOGs. Our results also demonstrated that maintaining a vegetation cover is a determining factor for the prevention and control of soil erosion, especially in IAOs, where retaining high percentages of natural plant-residue mulch layers (>70%) reduced soil loss by about 70% in this study.
英文关键词	soil erosion intensive almond orchards extensive olive groves rainfall simulations Portugal
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SSCI
WOS记录号	WOS:001055751100001
WOS关键词	ROCK FRAGMENT COVER ; WATER EROSION ; HYDROLOGICAL RESPONSE ; RUNOFF GENERATION ; NATURAL RAINFALL ; PARENT MATERIAL ; SOUTHERN SPAIN ; STRAW MULCH ; MANAGEMENT ; IMPACT
WOS类目	Environmental Studies
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397684
推荐引用方式 GB/T 7714	Nunes, Adelia N.,Goncalves, Joao Pedro,Figueiredo, Albano. Soil Erosion in Extensive versus Intensive Land Uses in Areas Sensitive to Desertification: A Case Study in Beira Baixa, Portugal[J],2023,12(8).
APA	Nunes, Adelia N.,Goncalves, Joao Pedro,&Figueiredo, Albano.(2023).Soil Erosion in Extensive versus Intensive Land Uses in Areas Sensitive to Desertification: A Case Study in Beira Baixa, Portugal.LAND,12(8).
MLA	Nunes, Adelia N.,et al."Soil Erosion in Extensive versus Intensive Land Uses in Areas Sensitive to Desertification: A Case Study in Beira Baixa, Portugal".LAND 12.8(2023).