干旱区生态环境知识资源中心(Arid): Challenges in determining soil moisture and evaporation fluxes using distributed temperature sensing methods

Arid

DOI	10.1016/j.jenvman.2020.110232
	Challenges in determining soil moisture and evaporation fluxes using distributed temperature sensing methods
	Lagos, Magdalena 1; Luis Serna, Jose 1,2; Francisco Munoz, Jose 1; Suarez, Francisco 1,3,4
通讯作者	Suarez, Francisco
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2020
卷号	261
英文摘要	To protect fragile groundwater-dependent environments of arid zones, it is important to monitor soil moisture and groundwater evaporation. Hence, it is important to assess new methods to quantify these environmental variables. In this work, we propose a new method to determine groundwater evaporation rates by combining the actively heated fiber-optic (AHFO) method with vadose zone modeling, assuming that the evaporation front remains at the soil surface. In our study, the AHFO method yielded estimates of the soil moisture (theta) profile with a spatial resolution of similar to 6.5 mm and with an error of 0.026 m(3) m(-3). The numerical model resulted in a slightly different theta profile than that measured, where the largest differences occurred at the soil surface. Sensitivity and uncertainty analyses highlighted that a better precision is required when determining the soil hydraulic parameters. To improve the proposed method, the soil heat-vapor-water dynamics should be included and the assumption that the evaporation front remains at the soil surface must be relaxed. Additionally, if the AHFO calibration curve is enhanced, the errors of the estimated theta profile can be reduced and thus, successful estimation of the evaporation rates for a wider range of soil textures can be achieved. The spatial scales measured are an important advantage of the proposed method that should be further explored to improve the analysis presented here.
英文关键词	Soil evaporation Shallow groundwater tables Distributed temperature sensing (DTS) Actively heated fiber optic (AHFO) method
类型	Article
语种	英语
国家	Chile ; Peru
收录类别	SCI-E
WOS记录号	WOS:000521511800041
WOS关键词	GROUNDWATER-DEPENDENT ECOSYSTEMS ; WATER-CONTENT ; HYDRAULIC CONDUCTIVITY ; SALINE SOIL ; HEAT ; SURFACE ; FIELD ; DRY ; EVAPOTRANSPIRATION ; EXTRACTION
WOS类目	Environmental Sciences
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/2XILL650/314943
作者单位	1.Pontificia Univ Catolica Chile, Dept Ingn Hidraul & Ambiental, Avda Vicuna Mackenna 4860, Santiago 4860, Chile; 2.Univ Alas Peruanas Filial Tumbes, Avda Tumbes Norte 1662, Tumbes, Peru; 3.Ctr Desarrollo Urbano Sustentable CEDEUS, CONICYT FONDAP 15110020, Santiago, RM, Chile; 4.CEGA, CONICYT FONDAP 15090013, Santiago, RM, Chile
推荐引用方式 GB/T 7714	Lagos, Magdalena,Luis Serna, Jose,Francisco Munoz, Jose,et al. Challenges in determining soil moisture and evaporation fluxes using distributed temperature sensing methods[J],2020,261.
APA	Lagos, Magdalena,Luis Serna, Jose,Francisco Munoz, Jose,&Suarez, Francisco.(2020).Challenges in determining soil moisture and evaporation fluxes using distributed temperature sensing methods.JOURNAL OF ENVIRONMENTAL MANAGEMENT,261.
MLA	Lagos, Magdalena,et al."Challenges in determining soil moisture and evaporation fluxes using distributed temperature sensing methods".JOURNAL OF ENVIRONMENTAL MANAGEMENT 261(2020).