Climate variability and vadose zone controls on damping of transient recharge

Corona, C; Gurdak, Jason J.; Dickinson, Jesse E.; Ferré, Ty P. A.; Maurer, Edwin P.

doi:10.1016/j.jhydrol.2017.08.028

Cited by 26 publications

(18 citation statements)

References 53 publications

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“…A concentration of ENSO-like signals in southern California is supported by previous studies that show a strong influence of ENSO on winter precipitation anomalies of the southern US (Kiladis and Diaz 1989;Kurtzman and Scanlon 2007;Ropelewski and Halpert 1986). However, less detection of the higher frequency ENSO signal in the groundwater levels than that of the PDO signal, may also be attributed to the relative greater damping of the higher frequencies in the relatively thick vadose zones of the study area (Corona et al 2018).…”

Section: Hydroclimatic Teleconnectionssupporting

confidence: 81%

“…However, while links between climate variability and groundwater levels have been identified in several parts of the world, little is known about the implications of complex couplings among modes, and their connection to droughts, which is pertinent to understanding future recharge and groundwater availability, especially in already water-stressed areas such as coastal Mediterranean regions. Recent studies have presented results on teleconnection interactions across various domains, including groundwater level fluctuations (Corona et al 2018;Neves et al 2019a, b;Velasco et al 2017) and drought extent (Jolly et al 2015;Liu et al 2010;Norman and Taylor 2003)-for example, the combined effects of the positive phase of NAO (NAO+) and the negative phase of EA (EA-) has extended drought severity and period in Portugal (Neves et al 2019b;Trigo et al 2013). Synchronized patterns can determine heat transfer, surface water and groundwater flows across Europe (Holman et al 2011;Kalimeris et al 2017;Steirou et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Groundwater response to climate variability in Mediterranean type climate zones with comparisons of California (USA) and Portugal

et al. 2022

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Aquifers are a fundamental source of freshwater, yet they are particularly vulnerable in coastal regions with Mediterranean type climate, due to both climatic and anthropogenic pressures. This comparative study examines the interrelationships between ocean-atmosphere teleconnections, groundwater levels and precipitation in coastal aquifers of California (USA) and Portugal. Piezometric and climate indices (1989-2019) are analyzed using singular spectral analysis and wavelet transform methods. Singular spectral analysis identifies signals consistent with the six dominant climate patterns: the Pacific Decadal Oscillation (PDO), the El Niño-Southern Oscillation (ENSO), and the Pacific/North American Oscillation (PNA) in California, and the North Atlantic Oscillation (NAO), the Eastern Atlantic Oscillation (EA) and the Scandinavian Pattern (SCAND) in Portugal. Lower-frequency oscillations have a greater influence on hydrologic patterns, with PDO (52.75%) and NAO (46.25%) on average accounting for the largest amount of groundwater level variability. Wavelet coherences show nonstationary covariability between climate patterns and groundwater levels in distinct period bands: 4-8 years for PDO, 2-4 years for ENSO, 1-2 years for PNA, 5-8 years for NAO, 2-4 years for EA and 2-8 years for SCAND. Wavelet coherence patterns also show that coupled climate patterns (NAO+ EA-and paired PDO and ENSO phases) are associated with major drought periods in both the Mediterranean climate zones.

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Section: Hydroclimatic Teleconnectionssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Groundwater response to climate variability in Mediterranean type climate zones with comparisons of California (USA) and Portugal

et al. 2022

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“…In some regions, irrigation recharge rates beneath irrigated cropland have been reported to be 1-2 or more orders of magnitude greater than diffuse recharge rates beneath adjacent natural rangeland (McMahon et al, 2006;Scanlon et al, 2005Scanlon et al, , 2006. The vadose zone in semiarid and arid regions can be many tens of meters thick, and have both slowly evolving and dynamic nonlinearities of unsaturated hydraulic properties that pose considerable challenges in efforts to quantify the spatiotemporal pattern of recharge and the temporal lags between LULC and climate change and corresponding recharge dynamics (Corona et al, 2017;Dickinson et al, 2014;Gurdak et al, 2007;Phillips, 1994;Velasco et al, 2017). Additionally, the hydrodynamic responses in the vadose zone to climate variability and changes are not well understood largely because of a general lack of field observations throughout the entire vadose zone and time scales longer than one to two years (Gurdak et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Irrigated agriculture and future climate change effects on groundwater recharge, northern High Plains aquifer, USA

Lauffenburger

Gurdak

Hobza

et al. 2018

Agricultural Water Management

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Understanding the controls of agriculture and climate change on recharge rates is critically important to develop appropriate sustainable management plans for groundwater resources and coupled irrigated agricultural systems. In this study, several physical (total potential (ψ T) time series) and chemical tracer and dating (3 H, Cl − , Br − , CFCs, SF 6 , and 3 H/ 3 He) methods were used to quantify diffuse recharge rates beneath two rangeland sites and irrigation recharge rates beneath two irrigated corn sites along an east-west (wet-dry) transect of the northern High Plains aquifer, Platte River Basin, central Nebraska. The field-based recharge estimates and historical climate were used to calibrate site-specific Hydrus-1D models, and irrigation requirements were estimated using the Crops Simulation Model (CROPSIM). Future model simulations were driven by an ensemble of 16 global climate models and two global warming scenarios to project a 2050 climate relative to the historical baseline 1990 climate, and simulate changes in precipitation, irrigation, evapotranspiration, and diffuse and irrigation recharge rates. Although results indicate statistical differences between the historical variables at the eastern and western sites and rangeland and irrigated sites, the low warming scenario (+1.0°C) simulations indicate no statistical differences between 2050 and 1990. However, the high warming scenarios (+2.4°C) indicate a 25% and 15% increase in median annual evapotranspiration and irrigation demand, and decreases in future diffuse recharge by 53% and 98% and irrigation recharge by 47% and 29% at the eastern and western sites, respectively. These results indicate an important threshold between the low and high warming scenarios that if exceeded could trigger a significant bidirectional shift in 2050 hydroclimatology and recharge gradients. The bidirectional shift is that future northern High Plains temperatures will resemble present central High Plains temperatures and future recharge rates in the east will resemble present recharge rates in the western part of the northern High Plains aquifer. The reductions in recharge rates could accelerate declining water levels if irrigation demand and other management strategies are not implemented. Findings here have important implications for future management of irrigation practices and to slow groundwater depletion in this important agricultural region.

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“…A better understanding of subsurface response to EPEs can improve future planning of groundwater resource allocations (Gurdak et al, 2009;Kløve et al, 2013). Using the HYDRUS-1D subsurface flow model with average soil hydraulic parameters estimated by Schaap et al (2001), Corona et al (2018) found that the prescribed flux (precipitation) and period (30, 180, 365, and 730 d) were the most statistically significant predictors of whether an infiltration flux became steady or transient recharge. The study examined the combinations of daily precipitation rates and soil types that could lead to recharge, finding that daily precipitation of lower intensity and finer-grained soils resulted in little to no recharge, whereas daily precipitation of greater intensity and coarser-grained soils, like sand, resulted in greater recharge.…”

Section: Core Ideasmentioning

confidence: 99%

Examining subsurface response to an extreme precipitation event using HYDRUS‐1D

Corona

2022

Vadose Zone Journal

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North-central Colorado experienced an extreme precipitation event (EPE) in September 2013, during which the equivalent of 80% of the region's annual average precipitation fell in a few days. Widespread flooding occurred above ground, but the shortand long-term subsurface response remains unclear. The objective of the study is to better understand the dynamic subsurface response, namely how the water table and soil water storage responded to a large amount of infiltration in a short period of time and how the hydrologic properties of the subsurface influence the response. Better understanding of subsurface response to EPEs is expected to increase with the advent of more intense and frequent EPEs in the coming decades. A one-dimensional subsurface flow model using HYDRUS-1D, was built to simulate and examine infiltration of an EPE at a site in the Boulder Creek Watershed, Colorado. Model calibration was conducted with local field data to fit site observations over a 6-yr period. A rapid water table depth response in field observations was observed, with the modeled subsurface storing water for 18 mo acting as a hydro-buffer during recovery. To examine influence on model results, a sensitivity study of soil hydraulic parameters was conducted. The sensitivity study found that changes in n, an empirical parameter related to pore-size distribution, most significantly affects water table depth. The implications are that one-dimensional models may provide useful estimates of water table fluctuations and subsurface hydro-buffer capacities in response to EPEs, which could be of use to regions preparing for EPE effect on water resources.

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Climate variability and vadose zone controls on damping of transient recharge

Cited by 26 publications

References 53 publications

Groundwater response to climate variability in Mediterranean type climate zones with comparisons of California (USA) and Portugal

Groundwater response to climate variability in Mediterranean type climate zones with comparisons of California (USA) and Portugal

Irrigated agriculture and future climate change effects on groundwater recharge, northern High Plains aquifer, USA

Examining subsurface response to an extreme precipitation event using HYDRUS‐1D

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