DOI: 10.5194/hess-22-2971-2018
论文题名: Groundwater withdrawal in randomly heterogeneous coastal aquifers
作者: Siena M. ; Riva M.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2018
卷: 22, 期: 5 起始页码: 2971
结束页码: 2985
语种: 英语
Scopus关键词: Aquifers
; Hydrogeology
; Mixing
; Oil field equipment
; Pumps
; Seawater effects
; Solute transport
; Stochastic systems
; Aquifer heterogeneity
; Groundwater withdrawal
; Monte Carlo approach
; Probabilistic framework
; Simultaneous extractions
; Statistical descriptions
; Three dimensional systems
; Variable-density flows
; Groundwater resources
; coastal aquifer
; groundwater
; heterogeneity
; mixing
; Monte Carlo analysis
; permeability
; pumping
; river basin
; saline intrusion
; solute transport
; three-dimensional flow
; Barcelona [Catalonia]
; Catalonia
; Maresme
; Spain
英文摘要: We analyze the combined effects of aquifer heterogeneity and pumping operations on seawater intrusion (SWI), a phenomenon which is threatening coastal aquifers worldwide. Our investigation is set within a probabilistic framework and relies on a numerical Monte Carlo approach targeting transient variable-density flow and solute transport in a three-dimensional randomly heterogeneous porous domain. The geological setting is patterned after the Argentona river basin, in the Maresme region of Catalonia (Spain). Our numerical study is concerned with exploring the effects of (a) random heterogeneity of the domain on SWI in combination with (b) a variety of groundwater withdrawal schemes. The latter have been designed by varying the screen location along the vertical direction and the distance of the wellbore from the coastline and from the location of the freshwater-saltwater mixing zone which is in place prior to pumping. For each random realization of the aquifer permeability field and for each pumping scheme, a quantitative depiction of SWI phenomena is inferred from an original set of metrics characterizing (a) the inland penetration of the saltwater wedge and (b) the width of the mixing zone across the whole three-dimensional system. Our results indicate that the stochastic nature of the system heterogeneity significantly affects the statistical description of the main features of the seawater wedge either in the presence or in the absence of pumping, yielding a general reduction of toe penetration and an increase of the width of the mixing zone. Simultaneous extraction of fresh and saltwater from two screens along the same wellbore located, prior to pumping, within the freshwater-saltwater mixing zone is effective in limiting SWI in the context of groundwater resources exploitation. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163302
Appears in Collections: 气候变化与战略
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作者单位: Siena, M., Dipartimento di Ingegneria Civile e Ambientale, Politecnico di Milano, Piazza L. Da Vinci 32, Milan, 20133, Italy; Riva, M., Dipartimento di Ingegneria Civile e Ambientale, Politecnico di Milano, Piazza L. Da Vinci 32, Milan, 20133, Italy
Recommended Citation:
Siena M.,Riva M.. Groundwater withdrawal in randomly heterogeneous coastal aquifers[J]. Hydrology and Earth System Sciences,2018-01-01,22(5)