Three-dimensional imaging of aquifer and aquitard heterogeneity via transient hydraulic tomography at a highly heterogeneous field site

doi:10.1016/j.jhydrol.2018.02.024

	Three-dimensional imaging of aquifer and aquitard heterogeneity via transient hydraulic tomography at a highly heterogeneous field site
	Zhao, Zhanfeng 1,2; Illman, Walter A.2
刊名	JOURNAL OF HYDROLOGY
	2018-04-01
卷号	559 页码:392-410
关键词	Hydraulic tomography Subsurface heterogeneity Aquitard characterization Model calibration and validation Inverse modeling Model comparison
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2018.02.024
通讯作者	Zhao, Zhanfeng(zhaozhanfeng@igsnrr.ac.cn)
英文摘要	Previous studies have shown that geostatistics-based transient hydraulic tomography (THT) is robust for subsurface heterogeneity characterization through the joint inverse modeling of multiple pumping tests. However, the hydraulic conductivity (K) and specific storage (S-s) estimates can be smooth or even erroneous for areas where pumping/observation densities are low. This renders the imaging of interlayer and intralayer heterogeneity of highly contrasting materials including their unit boundaries difficult. In this study, we further test the performance of THT by utilizing existing and newly collected pumping test data of longer durations that showed drawdown responses in both aquifer and aquitard units at a field site underlain by a highly heterogeneous glaciofluvial deposit. The robust performance of the THT is highlighted through the comparison of different degrees of model parameterization including: (1) the effective parameter approach; (2) the geological zonation approach relying on borehole logs; and (3) the geostatistical inversion approach considering different prior information (with/without geological data). Results reveal that the simultaneous analysis of eight pumping tests with the geostatistical inverse model yields the best results in terms of model calibration and validation. We also find that the joint interpretation of long-term drawdown data from aquifer and aquitard units is necessary in mapping their full heterogeneous patterns including intralayer variabilities. Moreover, as geological data are included as prior information in the geostatistics-based THT analysis, the estimated K values increasingly reflect the vertical distribution patterns of permeameter-estimated K in both aquifer and aquitard units. Finally, the comparison of various THT approaches reveals that differences in the estimated K and S-s tomograms result in significantly different transient drawdown predictions at observation ports. (C) 2018 Elsevier B.V. All rights reserved.
资助项目	Environmental Security and Technology Certification Program (ESTCP)[ER201212] ; China Scholarship Council ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Ontario Research Foundation (ORF) ; Canada Foundation for Innovation (CFI)
WOS关键词	ENSEMBLE KALMAN FILTER ; SANDBOX EXPERIMENTS ; LABORATORY SANDBOX ; UNCONFINED AQUIFERS ; GEOLOGICAL DATA ; PUMPING TESTS ; CONDUCTIVITY ; PARAMETERS ; INVERSION ; SYSTEMS
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000430902000030
资助机构	Environmental Security and Technology Certification Program (ESTCP) ; China Scholarship Council ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Ontario Research Foundation (ORF) ; Canada Foundation for Innovation (CFI)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/55011]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhao, Zhanfeng
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 2.Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON, Canada
推荐引用方式 GB/T 7714	Zhao, Zhanfeng,Illman, Walter A.. Three-dimensional imaging of aquifer and aquitard heterogeneity via transient hydraulic tomography at a highly heterogeneous field site[J]. JOURNAL OF HYDROLOGY,2018,559:392-410.
APA	Zhao, Zhanfeng,&Illman, Walter A..(2018).Three-dimensional imaging of aquifer and aquitard heterogeneity via transient hydraulic tomography at a highly heterogeneous field site.JOURNAL OF HYDROLOGY,559,392-410.
MLA	Zhao, Zhanfeng,et al."Three-dimensional imaging of aquifer and aquitard heterogeneity via transient hydraulic tomography at a highly heterogeneous field site".JOURNAL OF HYDROLOGY 559(2018):392-410.