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DOI | 10.1002/2017WR021655 |
Uncertainty Quantification and Global Sensitivity Analysis of Subsurface Flow Parameters to Gravimetric Variations during Pumping Tests in Unconfined Aquifers | |
Maina, Fadji Zaouna1; Guadagnini, Alberto1,2 | |
2018 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:1页码:501-518 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; USA |
英文摘要 | We study the contribution of typically uncertain subsurface flow parameters to gravity changes that can be recorded during pumping tests in unconfined aquifers. We do so in the framework of a Global Sensitivity Analysis and quantify the effects of uncertainty of such parameters on the first four statistical moments of the probability distribution of gravimetric variations induced by the operation of the well. System parameters are grouped into two main categories, respectively, governing groundwater flow in the unsaturated and saturated portions of the domain. We ground our work on the three-dimensional analytical model proposed by Mishra and Neuman (2011), which fully takes into account the richness of the physical process taking place across the unsaturated and saturated zones and storage effects in a finite radius pumping well. The relative influence of model parameter uncertainties on drawdown, moisture content, and gravity changes are quantified through (a) the Sobol' indices, derived from a classical decomposition of variance and (b) recently developed indices quantifying the relative contribution of each uncertain model parameter to the (ensemble) mean, skewness, and kurtosis of the model output. Our results document (i) the importance of the effects of the parameters governing the unsaturated flow dynamics on the mean and variance of local drawdown and gravity changes; (ii) the marked sensitivity (as expressed in terms of the statistical moments analyzed) of gravity changes to the employed water retention curve model parameter, specific yield, and storage, and (iii) the influential role of hydraulic conductivity of the unsaturated and saturated zones to the skewness and kurtosis of gravimetric variation distributions. The observed temporal dynamics of the strength of the relative contribution of system parameters to gravimetric variations suggest that gravity data have a clear potential to provide useful information for estimating the key hydraulic parameters of the system. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428474000028 |
WOS关键词 | POLYNOMIAL CHAOS EXPANSION ; GEOTHERMAL-FIELD ; GRAVITY CHANGES ; STORAGE CHANGE ; GAS-PRODUCTION ; WATER ; RESERVOIR ; FEASIBILITY ; TRANSPORT ; RECHARGE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19961 |
专题 | 资源环境科学 |
作者单位 | 1.Politecn Milan, Dipartimento Ingn Civile & Ambientale, Milan, Italy; 2.Univ Arizona, Dept Hydrol & Atmospher Sci, Tucson, AZ USA |
推荐引用方式 GB/T 7714 | Maina, Fadji Zaouna,Guadagnini, Alberto. Uncertainty Quantification and Global Sensitivity Analysis of Subsurface Flow Parameters to Gravimetric Variations during Pumping Tests in Unconfined Aquifers[J]. WATER RESOURCES RESEARCH,2018,54(1):501-518. |
APA | Maina, Fadji Zaouna,&Guadagnini, Alberto.(2018).Uncertainty Quantification and Global Sensitivity Analysis of Subsurface Flow Parameters to Gravimetric Variations during Pumping Tests in Unconfined Aquifers.WATER RESOURCES RESEARCH,54(1),501-518. |
MLA | Maina, Fadji Zaouna,et al."Uncertainty Quantification and Global Sensitivity Analysis of Subsurface Flow Parameters to Gravimetric Variations during Pumping Tests in Unconfined Aquifers".WATER RESOURCES RESEARCH 54.1(2018):501-518. |
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