Flow and Storage in Groundwater Systems

Alley, William M.; Healy, Richard W.; LaBaugh, James W.; Reilly, Thomas E.

doi:10.1126/science.1067123

Cited by 595 publications

(380 citation statements)

References 59 publications

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“…W ðtÞ ¼f ðtÞ½c 0 þ c 1 ðt − t 0 Þ : [11] This reflects both the recent redistribution of land use in the logistic curve and the long-term linear trend of increasing crop water use efficiencies (70). The coefficients inf were constrained to match existing redistribution trends of the median line in Fig.…”

Section: Appendix B Agricultural Production Methodsmentioning

confidence: 99%

“…The wise management of groundwater resources requires a more comprehensive understanding of the relationships between aquifer pumping and the capacity of the terrestrial environment to provide ecosystem goods and services upon which society depends (6,11). Informed decision making of processes involving the controls and feedbacks between society and ecosystems is founded on increased understanding of the relevant interdisciplinary linkages (3,12).…”

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confidence: 99%

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Tapping unsustainable groundwater stores for agricultural production in the High Plains Aquifer of Kansas, projections to 2110

Steward

Bruss

Yang

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

170

108

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Significance Society faces the multifaceted crossroads dilemma of sustainably balancing today’s livelihood with future resource needs. Currently, agriculture is tapping the High Plains Aquifer beyond natural replenishment rates to grow irrigated crops and livestock that augment global food stocks, and science-based information is needed to guide choices. We present new methods to project trends in groundwater pumping and irrigated corn and cattle production. Although production declines are inevitable, scenario analysis substantiates the impacts of increasing near-term water savings, which would extend the usable lifetime of the aquifer, increase net production, and generate a less dramatic production decline.

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Section: Appendix B Agricultural Production Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Tapping unsustainable groundwater stores for agricultural production in the High Plains Aquifer of Kansas, projections to 2110

Steward

Bruss

Yang

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

170

108

View full text Add to dashboard Cite

show abstract

“…Much of this understanding was achieved by using modeling approaches that consider the hydrology and soil chemistry separately, that assume simplified steady-state flow for spatial scales not larger than the field, and that only consider the RZ. However, recent research (6)(7)(8)(9)(10)(11) has shown that soils must be fully coupled with the vadose zone and groundwater systems for regional-scale studies, especially in areas where groundwater tables are shallow or groundwater pumping is used (12). Innovative predictive tools are needed that can be applied at the regional scale and at the long term, so that the sustainability of alternative management strategies can be evaluated.…”

mentioning

confidence: 99%

Sustainability of irrigated agriculture in the San Joaquin Valley, California

Schoups

Hopmans²,

Young³

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

243

141

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The sustainability of irrigated agriculture in many arid and semiarid areas of the world is at risk because of a combination of several interrelated factors, including lack of fresh water, lack of drainage, the presence of high water tables, and salinization of soil and groundwater resources. Nowhere in the United States are these issues more apparent than in the San Joaquin Valley of California. A solid understanding of salinization processes at regional spatial and decadal time scales is required to evaluate the sustainability of irrigated agriculture. A hydro-salinity model was developed to integrate subsurface hydrology with reactive salt transport for a 1,400-km 2 study area in the San Joaquin Valley. The model was used to reconstruct historical changes in salt storage by irrigated agriculture over the past 60 years. We show that patterns in soil and groundwater salinity were caused by spatial variations in soil hydrology, the change from local groundwater to snowmelt water as the main irrigation water supply, and by occasional droughts. Gypsum dissolution was a critical component of the regional salt balance. Although results show that the total salt input and output were about equal for the past 20 years, the model also predicts salinization of the deeper aquifers, thereby questioning the sustainability of irrigated agriculture.regional hydrology ͉ salinization ͉ vadose zone

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“…An extended evaluation of largescale groundwater models may be feasible with GRACE data. These models will also support the analysis of aquifer responses to water withdrawals in terms of reduced discharge or reduced storage (Alley et al 2002). At continental and global scales, the observed storage variations are an important contribution to the understanding of the global water cycle and its response to climate variability.…”

Section: Perspectives For Hydrogeologymentioning

confidence: 99%

Supporting large-scale hydrogeological monitoring and modelling by time-variable gravity data

2006

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One of the key variables for hydrogeological monitoring and modelling studies are temporal variations of the water storage in groundwater systems. Storage variations are a fundamental component of the groundwater balance and of the continental water cycle. Assessing groundwater storage change is central to water management with regard to water resources, ecology (e.g., wetland preservation), or engineering (e.g., land subsidence due to groundwater withdrawal). In particular at large spatial scales, however, measuring groundwater storage change is demanding. A dense observation network of wells is required to obtain reliable area-average values. For large aquifers or river basins and for remote areas this approach may not be feasible.An alternative method that has rarely been applied in hydrogeology is to monitor mass changes that are associated with water storage variations by means of gravity surveys. At the global scale, gravity satellite missions make use of the basic principle that the satellite's motion around the Earth is dominated by the Earth's gravity field. Thus, tracking perturbations of the satellite orbit allows for the determination of the underlying spatial and temporal variations of the gravity field. These very small perturbations originate, on the one hand, from the spatially inhomogeneous but quasi-static mass distribution of the solid Earth and, on the other hand, from the even smaller temporal variations caused by mass fluxes in

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Flow and Storage in Groundwater Systems

Cited by 595 publications

References 59 publications

Tapping unsustainable groundwater stores for agricultural production in the High Plains Aquifer of Kansas, projections to 2110

Tapping unsustainable groundwater stores for agricultural production in the High Plains Aquifer of Kansas, projections to 2110

Sustainability of irrigated agriculture in the San Joaquin Valley, California

Supporting large-scale hydrogeological monitoring and modelling by time-variable gravity data

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