Evolving issues and practices in managing ground-water resources: Case studies on the role of science

Galloway, Devin L.; Alley, William M.; Barlow, Paul M.; Reilly, Thomas E.; Tucci, Patrick

doi:10.3133/cir1247

Cited by 19 publications

(13 citation statements)

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“…An accurate water budget is an important basis for managing groundwater resources and for understanding hydrologic fluxes at local and regional scales. Even at national and global scales, estimates of groundwater budgets can provide useful input to water policy issues [ Galloway et al , 2003; Konikow and Kendy , 2005; U.S. Geological Survey , 2002; Zekster , 2000] as well as to understanding the human role in global changes in the hydrosphere, such as sea level rise [ Sahagian et al , 1994]. At a World Climate Research Programme workshop held in 2006, participants highlighted the need for data on changes in subsurface water storage resulting from groundwater use changes and aquifer mining, among other factors [ Church et al , 2007].…”

Section: Introductionmentioning

confidence: 99%

A method to estimate groundwater depletion from confining layers

Konikow

Neuzil

2007

Water Resources Research

121

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[1] Although depletion of storage in low-permeability confining layers is the source of much of the groundwater produced from many confined aquifer systems, it is all too frequently overlooked or ignored. This makes effective management of groundwater resources difficult by masking how much water has been derived from storage and, in some cases, the total amount of water that has been extracted from an aquifer system. Analyzing confining layer storage is viewed as troublesome because of the additional computational burden and because the hydraulic properties of confining layers are poorly known. In this paper we propose a simplified method for computing estimates of confining layer depletion, as well as procedures for approximating confining layer hydraulic conductivity (K) and specific storage (S s ) using geologic information. The latter makes the technique useful in developing countries and other settings where minimal data are available or when scoping calculations are needed. As such, our approach may be helpful for estimating the global transfer of groundwater to surface water. A test of the method on a synthetic system suggests that the computational errors will generally be small. Larger errors will probably result from inaccuracy in confining layer property estimates, but these may be no greater than errors in more sophisticated analyses. The technique is demonstrated by application to two aquifer systems: the Dakota artesian aquifer system in South Dakota and the coastal plain aquifer system in Virginia. In both cases, depletion from confining layers was substantially larger than depletion from the aquifers.Citation: Konikow, L. F., and C. E. Neuzil (2007), A method to estimate groundwater depletion from confining layers, Water Resour.

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Section: Introductionmentioning

confidence: 99%

A method to estimate groundwater depletion from confining layers

Konikow

Neuzil

2007

Water Resources Research

121

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“…Many previous studies have investigated ways to achieve groundwater sustainability, including liming groundwater abstraction, increasing groundwater recharge, conjunctive use of surface and groundwater, and better use of groundwater storage [53,54]. Several effective approaches have been attempted in the NCP [55].…”

Section: Gra Between Water Table Depth and Influencing Factorsmentioning

confidence: 99%

Identifying Major Factors Affecting Groundwater Change in the North China Plain with Grey Relational Analysis

Xue

Zhang

2014

Water

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Abstract:The North China Plain (NCP) is facing a water crisis under the dual impact of natural and anthropogenic factors. Groundwater levels have declined continuously since 1960, causing a series of environmental problems that have restricted sustainable development in the region. In the present study, we first utilized a previously developed 3D groundwater model to determine changes in groundwater level in the region over the past 50 years . We then applied grey relational analysis (GRA) to identify and ordinate major factors that have contributed to these changes. The results show an overall decreasing trend in groundwater levels in this region over the past 50 years and an increase in the water table depth at a rate of approximately 0.36 m/a. Groundwater exploitation showed the most significant correlation with the groundwater table decline, when compared with other factors including precipitation and river leakage. Therefore, human activities should be considered the primary force driving the groundwater level down. The results of this study have implications for developing criteria that consider changes in both climate and socio-economics. Furthermore, since the NCP is one of the most water-scarce OPEN ACCESSWater 2014, 6 1582 and densely populated regions in the world, the analytical approach used in and the insights gained from this study are of international interest.

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“…In estimating sustainable yield, it should be more fully recognized that the sustainable yield of a groundwater supply depends partly on the location and partial penetration of supply wells; that full capture of surface recharge by deeply partially penetrating wells may not be possible; and that in‐stream uses and aquatic and riparian ecosystem impacts (Alley et al 1999; Galloway et al 2003; Niswonger and Prudic 2005) can be minimized but not eliminated.…”

Section: Evaluation and Management Improvementsmentioning

confidence: 99%