globalchange  > 科学计划与规划
DOI: 10.1002/2015GL066916
论文题名:
The imprint of climate and geology on the residence times of groundwater
作者: Maxwell R.M.; Condon L.E.; Kollet S.J.; Maher K.; Haggerty R.; Forrester M.M.
刊名: Geophysical Research Letters
ISSN: 0094-9470
EISSN: 1944-9201
出版年: 2016
卷: 43, 期:2
起始页码: 701
结束页码: 708
语种: 英语
英文关键词: residence time
Scopus关键词: Catchments ; Geology ; Groundwater ; Ecosystem functions ; Fractal distribution ; Model results ; Residence time ; Small catchment ; Surface and subsurface flow ; Water availability ; Water table depths ; Residence time distribution ; aridity ; climate effect ; hydraulic conductivity ; hydrogeology ; radionuclide ; residence time ; subsurface flow ; water availability ; water table ; watershed ; North America
英文摘要: Surface and subsurface flow dynamics govern residence time or water age until discharge, which is a key metric of storage and water availability for human use and ecosystem function. Although observations in small catchments have shown a fractal distribution of ages, residence times are difficult to directly quantify or measure in large basins. Here we use a simulation of major watersheds across North America to compute distributions of residence times. This simulation results in peak ages from 1.5 to 10.5 years, in agreement with isotopic observations from bomb-derived radioisotopes, and a wide range of residence times - from 0.1 to 10,000 years. This simulation suggests that peak residence times are controlled by the mean hydraulic conductivity, a function of the prevailing geology. The shape of the residence time distribution is dependent on aridity, which in turn determines water table depth and the frequency of shorter flow paths. These model results underscore the need for additional studies to characterize water ages in larger systems. © 2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84958062550&doi=10.1002%2f2015GL066916&partnerID=40&md5=d9f09af2102894879bc8f75d3623a3b2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10433
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Hydrologic Science and Engineering Program, Integrated GroundWater Modeling Center, Department of Geology and Geological Engineering, Colorado School of Mines, Goldena, CO, United States

Recommended Citation:
Maxwell R.M.,Condon L.E.,Kollet S.J.,et al. The imprint of climate and geology on the residence times of groundwater[J]. Geophysical Research Letters,2016-01-01,43(2).
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