干旱区生态环境知识资源中心(Arid): Estimation of unsaturated permeability in a sanitary landfill cover layer in the Brazilian semiarid region

Arid

DOI	10.1590/S1413-415220220108
	Estimation of unsaturated permeability in a sanitary landfill cover layer in the Brazilian semiarid region
	da Silva, Thiago Fernandes; das Neves Santos, Jeovana Jisla; Martins de Souza, Jordan Carneiro; Araujo, Pabllo da Silva; de Paiva, William
通讯作者	da Silva, TF
来源期刊	ENGENHARIA SANITARIA E AMBIENTAL
ISSN	1413-4152
EISSN	1809-4457
出版年	2022
卷号	27 期号:5 页码:1049-1057
英文摘要	The sanitary landfill cover layer has the main function of minimizing the flow of toxic gases into the atmosphere and reducing the infiltration of rainwater into the massif. However, permeability to water in saturated conditions (k(sat)) does not convey the actual situation in which the soil is found, especially in landfills in semi-arid regions, and permeability in the unsaturated condition (k(nsat)) is essential to understand the behavior of this layer. Thus, this work aimed to estimate the k(nsat) behavior of a soil used in the cover layer of a sanitary landfill in the Brazilian semiarid region. The geotechnical characterization of the soil was carried out and, then, the behavior of the suction with variations in volumetric moisture was verified. Subsequently, the adjustment of the retention curves was carried out, obtaining the model that presents the best fit. From the data obtained for k(sat), it was possible to infer the values of k(nsat). The experimental data show that the model that presented the best fit obtained k(nsat) values between 10-7 and 10-15 m/s. Thus, it was verified that the low humidity observed in the soils of this region promote a sudden decrease in the permeability to water in the unsaturated condition, favoring the use of this soil in layers of cover of sanitary landfills. With the knowledge of the behavior of this permeability, it is possible to have control of the execution process and the consequent reduction of risks of environmental accidents, either by the migration of gases to the atmosphere or by the increase in the level of liquids in the sanitary cell.
英文关键词	unsaturated permeability filter paper method retention curve
类型	Article
语种	Portuguese
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000880392200001
WOS关键词	HYDRAULIC CONDUCTIVITY
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/2XILL650/392434
推荐引用方式 GB/T 7714	da Silva, Thiago Fernandes,das Neves Santos, Jeovana Jisla,Martins de Souza, Jordan Carneiro,et al. Estimation of unsaturated permeability in a sanitary landfill cover layer in the Brazilian semiarid region[J],2022,27(5):1049-1057.
APA	da Silva, Thiago Fernandes,das Neves Santos, Jeovana Jisla,Martins de Souza, Jordan Carneiro,Araujo, Pabllo da Silva,&de Paiva, William.(2022).Estimation of unsaturated permeability in a sanitary landfill cover layer in the Brazilian semiarid region.ENGENHARIA SANITARIA E AMBIENTAL,27(5),1049-1057.
MLA	da Silva, Thiago Fernandes,et al."Estimation of unsaturated permeability in a sanitary landfill cover layer in the Brazilian semiarid region".ENGENHARIA SANITARIA E AMBIENTAL 27.5(2022):1049-1057.