Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.2136/vzj2006.0087 |
Climate variability controls on unsaturated water and chemical movement, High Plains aquifer, USA | |
Gurdak, Jason J.; Hanson, Randall T.; McMahon, Peter B.; Bruce, Breton W.; McCray, John E.; Thyne, Geoffrey D.; Reedy, Robert C. | |
通讯作者 | Gurdak, Jason J. |
会议名称 | International Conference on Groundwater Resources Assesment under the Presures of Humanity and Climate Change |
会议日期 | APR 04-06, 2006 |
会议地点 | Kyoto, JAPAN |
英文摘要 | Responses in the vadose zone and groundwater to interannual, interdecadal, and multidecadal climate variability have important implications for groundwater resource sustainability, yet they are poorly documented and not well understood in most aquifers of the USA. This investigation systematically examines the role of interannual to multidecadal climate variability on groundwater levels, deep infiltration (3-23 m) events, and downward displacement (> 1 m) of chloride and nitrate reservoirs in thick (15-50 m) vadose zones across the regionally extensive High Plains aquifer. Such vadose zone responses are unexpected across much of the aquifer given a priori that unsaturated total-potential profiles indicate upward water movement from the water table toward the root zone, mean annual potential evapotranspiration exceeds mean annual precipitation, and millennia-scale evapoconcentration results in substantial vadose zone chloride and nitrate reservoirs. Using singular spectrum analysis (SSA) to reconstruct precipitation and groundwater level time-series components, variability was identified in all time series as partially coincident with known climate cycles, such as the Pacific Decadal Oscillation (PDO) (10-25 yr) and the El Nino/ Southern Oscillation (ENSO) (2-6 yr). Using these lag-correlated hydrologic time series, a new method is demonstrated to estimate climate-varying unsaturated water flux. The results suggest the importance of interannual to interdecadal climate variability on water-flux estimation in thick vadose zones and provide better understanding of the climate-induced transients responsible for the observed deep infiltration and chemical-mobilization events. Based on these results, we discuss implications for climate-related sustainability of the High Plains aquifer. |
来源出版物 | VADOSE ZONE JOURNAL |
ISSN | 1539-1663 |
出版年 | 2007 |
卷号 | 6 |
期号 | 3 |
页码 | 533-547 |
出版者 | SOIL SCI SOC AMER |
类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | CPCI-S ; SCI-E |
WOS记录号 | WOS:000249015500013 |
WOS关键词 | SOUTHWESTERN UNITED-STATES ; QUANTIFYING GROUNDWATER RECHARGE ; NORTH-AMERICAN MONSOON ; HYDROLOGIC TIME-SERIES ; DESERT SOILS ; PACIFIC ; PRECIPITATION ; OSCILLATION ; TEMPERATURE ; EVOLUTION |
WOS类目 | Environmental Sciences ; Soil Science ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Agriculture ; Water Resources |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/296879 |
作者单位 | (1)USGS, Denver, CO USA;(2)Colorado Sch Mines, Golden, CO 80401 USA;(3)USGS, San Diego, CA USA;(4)Bur Econ Geol, Austin, TX USA |
推荐引用方式 GB/T 7714 | Gurdak, Jason J.,Hanson, Randall T.,McMahon, Peter B.,et al. Climate variability controls on unsaturated water and chemical movement, High Plains aquifer, USA[C]:SOIL SCI SOC AMER,2007:533-547. |
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