Relations between climate variability and groundwater fluctuations in U.S. principal aquifers
The response of groundwater to interannual to multidecadal climate oscillations has important implications for water-resource sustainability, however, there is a poor understanding of how physical processes in the vadose zone dampen and filter climate variability signals prior to recharging the wate...
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San Francisco State University
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ftcalifstateuniv:oai:scholarworks:41687k07k 2024-09-30T14:31:33+00:00 Relations between climate variability and groundwater fluctuations in U.S. principal aquifers Elzie Monique Lapus Velasco Jason J. Gurdak Leonard Sklar John P. Monteverdi 2015 http://hdl.handle.net/10211.3/142403 English eng San Francisco State University Science & Engineering Geosciences http://hdl.handle.net/10211.3/142403 Copyright by Elzie Monique Lapuz Velasco, 2015 AS36 2015 GEOL .V45 Masters Thesis 2015 ftcalifstateuniv 2024-09-10T17:06:15Z The response of groundwater to interannual to multidecadal climate oscillations has important implications for water-resource sustainability, however, there is a poor understanding of how physical processes in the vadose zone dampen and filter climate variability signals prior to recharging the water table. This thesis addresses this knowledge gap by quantifying the teleconnections between six modes of quasi-periodic climate variations and precipitation and groundwater level fluctuations within seven sand and gravel principal aquifers (PAs) in the United States. The six modes of climate variability are the Atlantic Multidecadal Oscillation (50-80 year cycle), Pacific Decadal Oscillation (15-30 year cycle ), El Nino-Southern Oscillation (2-7 year cycle), North Atlantic Oscillation (3-6 year cycle), Pacific/North American Oscillation (1-4 year cycle), and Arctic Oscillation (6-12 month cycle). Singular Spectrum Analysis was used to quantify climate variability signals in climatic and hydrologic time series, and the influence of soil texture, vadose zone thickness, mean infiltration flux, and infiltration period on the damping of sinusoidal signals in the vadose zone was explored using an analytical model. Results indicate that each PA reflects some influence from each of the six modes of climate variability and that the effects of these climate variations on groundwater fluctuations can be characterized spatially based on the degree of damping. There is a consistent increase (decrease) in average percent variance and lag correlation coefficients with longer (shorter) fluctuation periods. These findings highlight the importance of low frequency climate variations on hydrologic fluctuations and indicate that considering these long-term patterns will help with water resource management. Master Thesis Arctic North Atlantic North Atlantic oscillation Scholarworks from California State University Arctic Pacific |
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Scholarworks from California State University |
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English |
description |
The response of groundwater to interannual to multidecadal climate oscillations has important implications for water-resource sustainability, however, there is a poor understanding of how physical processes in the vadose zone dampen and filter climate variability signals prior to recharging the water table. This thesis addresses this knowledge gap by quantifying the teleconnections between six modes of quasi-periodic climate variations and precipitation and groundwater level fluctuations within seven sand and gravel principal aquifers (PAs) in the United States. The six modes of climate variability are the Atlantic Multidecadal Oscillation (50-80 year cycle), Pacific Decadal Oscillation (15-30 year cycle ), El Nino-Southern Oscillation (2-7 year cycle), North Atlantic Oscillation (3-6 year cycle), Pacific/North American Oscillation (1-4 year cycle), and Arctic Oscillation (6-12 month cycle). Singular Spectrum Analysis was used to quantify climate variability signals in climatic and hydrologic time series, and the influence of soil texture, vadose zone thickness, mean infiltration flux, and infiltration period on the damping of sinusoidal signals in the vadose zone was explored using an analytical model. Results indicate that each PA reflects some influence from each of the six modes of climate variability and that the effects of these climate variations on groundwater fluctuations can be characterized spatially based on the degree of damping. There is a consistent increase (decrease) in average percent variance and lag correlation coefficients with longer (shorter) fluctuation periods. These findings highlight the importance of low frequency climate variations on hydrologic fluctuations and indicate that considering these long-term patterns will help with water resource management. |
author2 |
Jason J. Gurdak Leonard Sklar John P. Monteverdi |
format |
Master Thesis |
author |
Elzie Monique Lapus Velasco |
spellingShingle |
Elzie Monique Lapus Velasco Relations between climate variability and groundwater fluctuations in U.S. principal aquifers |
author_facet |
Elzie Monique Lapus Velasco |
author_sort |
Elzie Monique Lapus Velasco |
title |
Relations between climate variability and groundwater fluctuations in U.S. principal aquifers |
title_short |
Relations between climate variability and groundwater fluctuations in U.S. principal aquifers |
title_full |
Relations between climate variability and groundwater fluctuations in U.S. principal aquifers |
title_fullStr |
Relations between climate variability and groundwater fluctuations in U.S. principal aquifers |
title_full_unstemmed |
Relations between climate variability and groundwater fluctuations in U.S. principal aquifers |
title_sort |
relations between climate variability and groundwater fluctuations in u.s. principal aquifers |
publisher |
San Francisco State University |
publishDate |
2015 |
url |
http://hdl.handle.net/10211.3/142403 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic North Atlantic North Atlantic oscillation |
genre_facet |
Arctic North Atlantic North Atlantic oscillation |
op_source |
AS36 2015 GEOL .V45 |
op_relation |
http://hdl.handle.net/10211.3/142403 |
op_rights |
Copyright by Elzie Monique Lapuz Velasco, 2015 |
_version_ |
1811636037266440192 |