Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017WR021531 |
Regionalization of Groundwater Residence Time Using Metamodeling | |
Starn, J. J.1; Belitz, K.2 | |
2018-09-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:9页码:6357-6373 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Groundwater residence-time distributions (RTDs) are critical for assessing susceptibility of water resources to degradation. A novel combination of numerical modeling and statistical methods allows estimation of regional RTDs with unprecedented speed. In this method, particle RTDs are generated in 30 type locales in the northeastern glaciated U.S. by using automated generalized finite-difference groundwater flow and advective transport models. Targets for statistical learning were created from particle RTDs by fitting Weibull, gamma, and inverse Gaussian distributions. Whole-basin flux-weighted RTDs were well fit by one-component Weibull distributions. Flux-weighted RTDs at stressed receptors such as wells often produced more complicated RTDs that required a two-component mixture to fit. A Multitask LASSO regression was trained on the parametric RTDs using hydrogeographic features of the modeled areas as explanatory features. In this way, RTDs are regionalized with mappable physical features such as recharge and aquifer volume. The shape, location, and scale parameters of the parametric RTDs are strongly related to the mean exponential age. The shape parameter of the distribution, which controls deviation from exponential, is additionally a function of aquifer heterogeneity and hydrologic features. Regionalized RTDs provide useful metrics with respect to groundwater lag times and solute loading to streams. The lag time between input and output contained in the RTD is critical to understanding the relation between the land surface and human and ecological receptors. |
英文关键词 | groundwater residence-time metamodel age distribution particle models advective transport |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448088100031 |
WOS关键词 | CATCHMENT TRANSIT-TIME ; ENVIRONMENTAL TRACERS ; THEORETICAL-ANALYSIS ; AGE-DISTRIBUTION ; QUALITY TRENDS ; WATER-QUALITY ; FLOW ; MODELS ; WELLS ; SYSTEMS |
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/21886 |
专题 | 资源环境科学 |
作者单位 | 1.US Geol Survey, New England Water Sci Ctr, E Hartford, CT 06108 USA; 2.US Geol Survey, Carlisle, MA USA |
推荐引用方式 GB/T 7714 | Starn, J. J.,Belitz, K.. Regionalization of Groundwater Residence Time Using Metamodeling[J]. WATER RESOURCES RESEARCH,2018,54(9):6357-6373. |
APA | Starn, J. J.,&Belitz, K..(2018).Regionalization of Groundwater Residence Time Using Metamodeling.WATER RESOURCES RESEARCH,54(9),6357-6373. |
MLA | Starn, J. J.,et al."Regionalization of Groundwater Residence Time Using Metamodeling".WATER RESOURCES RESEARCH 54.9(2018):6357-6373. |
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