Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1745-6584.2009.00655.x |
Ambiguous Hydraulic Heads and C-14 Activities in Transient Regional Flow | |
Schwartz, Franklin W.1; Sudicky, Edward A.2; McLaren, Robert G.2; Park, Young-Jin2; Huber, Matthew3; Apted, Mick4 | |
通讯作者 | Schwartz, Franklin W. |
来源期刊 | GROUND WATER
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ISSN | 0017-467X |
出版年 | 2010 |
卷号 | 48期号:3页码:366-379 |
英文摘要 | A regional flow and transport model is used to explore the implications of significant variability in Pleistocene and Holocene climates on hydraulic heads and C-14 activity. Simulations involve a 39 km slice of the Death Valley Flow System through Yucca Mountain toward the Amargosa Desert. The long-time scale over which infiltration has changed (tens-of-thousands of years) is matched by the large physical extent of the flow system (many tens-of-kilometers). Estimated paleo-infiltration rates were estimated using a juniper pollen percentage that extends from the last interglacial (LIG) period (approximately 120 kyrbp) to present. Flow and C-14 transport simulations show that groundwater flow changes markedly as a function of paleoclimate. At the last glacial maximum (LGM, 21 kyrbp), the recharge to the flow system was about an order-of-magnitude higher than present, and water table was more than 100 m higher. With large basin time constants, flow is complicated because hydraulic heads at a given location reflect conditions of the past, but at another location the flow may reflect present conditions. This complexity is also manifested by processes that depend on flow, for example C-14 transport. Without a model that accounts for the historical transients in recharge for at least the last 20,000 years, there is no simple way to deconvolve the C-14 dates to explain patterns of flow. |
类型 | Article |
语种 | 英语 |
国家 | USA ; Canada |
收录类别 | SCI-E |
WOS记录号 | WOS:000277123100013 |
WOS关键词 | YUCCA MOUNTAIN ; LATE PLEISTOCENE ; NEVADA ; GROUNDWATER ; HOLOCENE ; WATER ; BASIN ; MODEL |
WOS类目 | Geosciences, Multidisciplinary ; Water Resources |
WOS研究方向 | Geology ; Water Resources |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/164428 |
作者单位 | 1.Ohio State Univ, Sch Earth Sci, Mendenhall Lab 275, Columbus, OH 43210 USA; 2.Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON N2L 3G1, Canada; 3.Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA; 4.Monitor Sci LLC, Denver, CO 80235 USA |
推荐引用方式 GB/T 7714 | Schwartz, Franklin W.,Sudicky, Edward A.,McLaren, Robert G.,et al. Ambiguous Hydraulic Heads and C-14 Activities in Transient Regional Flow[J],2010,48(3):366-379. |
APA | Schwartz, Franklin W.,Sudicky, Edward A.,McLaren, Robert G.,Park, Young-Jin,Huber, Matthew,&Apted, Mick.(2010).Ambiguous Hydraulic Heads and C-14 Activities in Transient Regional Flow.GROUND WATER,48(3),366-379. |
MLA | Schwartz, Franklin W.,et al."Ambiguous Hydraulic Heads and C-14 Activities in Transient Regional Flow".GROUND WATER 48.3(2010):366-379. |
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