干旱区生态环境知识资源中心(Arid): The role of unpaved roads in the sediment budget of a semiarid mesoscale catchment

Arid

DOI	10.1002/ldr.4120
	The role of unpaved roads in the sediment budget of a semiarid mesoscale catchment
	Lima Farias, Teresa Raquel; Augusto Medeiros, Pedro Henrique; de Araujo, Jose Carlos; Navarro-Hevia, Joaquin
通讯作者	Farias, TRL (corresponding author), Fed Inst Educ Sci & Technol Ceara, Dept Civil Construct, Av Treze de Maio 2081, BR-60040215 Fortaleza, Ceara, Brazil.
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2021
英文摘要	High erosion and runoff rates have been measured on road infrastructure, indicating that unpaved roads might be significant sources of sediment in catchments. In this paper, the production of surface sediments from unpaved rural roads is assessed in Northeastern Brazil, in a semiarid area of the caatinga biome, vulnerable to desertification. Sediment production data from road surface segments were monitored for 2 years (2013-2014) under conditions of natural precipitation. By using hydrosedimentological modeling and a geographical information system (GIS), the sediment budget was calculated at the meso-scale catchment (aprox. 930 km(2)), in order to identify the relative contribution of roads to the sediment balance. The universal soil loss equation (USLE) associated with Maner's sediment delivery ratio (SDR) equation, proved to be an adequate approach for predicting sediment yield on the road segment scale. The best results were obtained for the road without traffic, due to the non-interference in this segment of external factors, such as traffic and maintenance activities, not explicitly considered in the model formulation. The modeling procedure showed that the roads, which occupy only 0.7% of the catchment surface, were responsible for approximately 7% of soil loss in the area. Furthermore, sediment connectivity might be enhanced by roads, which cross the river network and, therefore, deliver more directly the sediment generated at hillslopes. This is particularly important in the studied environment, where sediment connectivity is low due to limited runoff and the existence of a dense network of surface water reservoirs.
英文关键词	caatinga biome hydrosedimentological modeling road erosion sediment yield semiarid USLE
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000716204400001
WOS关键词	RURAL CATCHMENT ; SOURCE AREAS ; EROSION ; TRANSPORT ; RUNOFF ; YIELD ; CONNECTIVITY
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367684
作者单位	[Lima Farias, Teresa Raquel; Augusto Medeiros, Pedro Henrique] Fed Inst Educ Sci & Technol Ceara, Dept Civil Construct, Av Treze de Maio 2081, BR-60040215 Fortaleza, Ceara, Brazil; [de Araujo, Jose Carlos] Univ Fed Ceara, Dept Agr Engn, Fortaleza, Ceara, Brazil; [Navarro-Hevia, Joaquin] Univ Valladolid, Agroforestry Dept, Palencia, Spain
推荐引用方式 GB/T 7714	Lima Farias, Teresa Raquel,Augusto Medeiros, Pedro Henrique,de Araujo, Jose Carlos,et al. The role of unpaved roads in the sediment budget of a semiarid mesoscale catchment[J],2021.
APA	Lima Farias, Teresa Raquel,Augusto Medeiros, Pedro Henrique,de Araujo, Jose Carlos,&Navarro-Hevia, Joaquin.(2021).The role of unpaved roads in the sediment budget of a semiarid mesoscale catchment.LAND DEGRADATION & DEVELOPMENT.
MLA	Lima Farias, Teresa Raquel,et al."The role of unpaved roads in the sediment budget of a semiarid mesoscale catchment".LAND DEGRADATION & DEVELOPMENT (2021).