干旱区生态环境知识资源中心(Arid): Connectivity of fractures and groundwater flows analyses into the Western Andean Front by means of a topological approach (Aconcagua Basin, Central Chile)

Arid

DOI	10.1007/s10040-020-02200-3
	Connectivity of fractures and groundwater flows analyses into the Western Andean Front by means of a topological approach (Aconcagua Basin, Central Chile)
	Taucare, Matias 1,2; Viguier, Benoit 1,2; Daniele, Linda 1,2; Heuser, Gert 3; Arancibia, Gloria 2,3; Leonardi, Veronique 4
通讯作者	Taucare, Matias
来源期刊	HYDROGEOLOGY JOURNAL
ISSN	1431-2174
EISSN	1435-0157
出版年	2020
卷号	28 期号:7 页码:2429-2438
英文摘要	The misunderstanding of hydrogeological processes together with the oversimplification of aquifer conceptual models result in numerous inaccuracies in the management of groundwater resources. In Central Chile (32-36 degrees S), hydrogeological studies have exclusively focused to alluvial aquifers in valleys (similar to 15% of total area) and mountain-front zones remain considered as no-flux boundary conditions. By a topological approach and an analysis of fractures, the hydrogeological potential of the Western Andean Front along the N-S-oriented Pocuro Fault Zone (PFZ) in the Aconcagua Basin were determined. Perennial springs (23) show evidence of groundwater flows into the fractured Principal Cordillera. Topology allows for quantification of the density of connected fractures within the fault zone and its relationship with groundwater circulation. The study results highlight two areas where the density of fractures and connected nodes (Nc) is high (>2.4 km/km(2), 2.5 Nc/km(2)). Both areas are topologically related to the main springs of the PFZ:Termas de Jahuel(discharge similar to 14.0 m(3)/h at 22 degrees C) andTermas El Corazon(discharge similar to 7.2 m(3)/h at 20 degrees C). Outcrop-scale mapping reveals that groundwater outflows from NW-SE fractures, which is consistent with the preferential orientation of the fracture network (N30-60 W) within the PFZ. The results indicate that oblique basement faults are discrete high-permeability structures conducting groundwater across the Western Andean Front from the Principal Cordillera up to adjacent alluvial aquifers (focused recharge). Therefore, the simplistic hydrogeological view of the Western Andean Front (i.e. impervious limit) is partially erroneous.
英文关键词	Springs Fractured rock Groundwater exploration Chile
类型	Article
语种	英语
国家	Chile ; France
收录类别	SCI-E
WOS记录号	WOS:000542526600001
WOS关键词	SOUTHERN VOLCANIC ZONE ; PAMPA DEL TAMARUGAL ; MOUNTAIN-FRONT ; ATACAMA DESERT ; DAMAGE ZONES ; GREAT-BASIN ; RIVER-BASIN ; AQUIFER ; RECHARGE ; WATER
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319577
作者单位	1.Univ Chile, Fac Ciencias Fis & Matemat FCFM, Dept Geol, Santiago, Chile; 2.Univ Chile, Fac Ciencias Fis & Matemat FCFM, Ctr Excelencia Geotermia Los Andes CEGA, Santiago, Chile; 3.Pontificia Univ Catolica Chile, Dept Ingn Estruct & Geotecn, Escuela Ingn, Santiago, Chile; 4.Univ Montpellier, CNRS, HydroSci Montpellier HSM, IRD, Montpellier, France
推荐引用方式 GB/T 7714	Taucare, Matias,Viguier, Benoit,Daniele, Linda,et al. Connectivity of fractures and groundwater flows analyses into the Western Andean Front by means of a topological approach (Aconcagua Basin, Central Chile)[J]. French National Research Institute for Sustainable Development,2020,28(7):2429-2438.
APA	Taucare, Matias,Viguier, Benoit,Daniele, Linda,Heuser, Gert,Arancibia, Gloria,&Leonardi, Veronique.(2020).Connectivity of fractures and groundwater flows analyses into the Western Andean Front by means of a topological approach (Aconcagua Basin, Central Chile).HYDROGEOLOGY JOURNAL,28(7),2429-2438.
MLA	Taucare, Matias,et al."Connectivity of fractures and groundwater flows analyses into the Western Andean Front by means of a topological approach (Aconcagua Basin, Central Chile)".HYDROGEOLOGY JOURNAL 28.7(2020):2429-2438.