Groundwater depletion: A global problem

Konikow, Leonard F.; Kendy, Eloise

doi:10.1007/s10040-004-0411-8

Cited by 725 publications

(416 citation statements)

References 5 publications

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“…Due to the extremely slow process of groundwater recharge, excessive depletion of groundwater resources in those regions will not be fully restored in the foreseeable future. Groundwater depletion not only results in insufficient water to support sustainable local economic development, but also increases energy consumption as more energy is required to pump groundwater from greater depths below the surface, increasing demand on an already constrained energy supply (Konikow and Kendy 2005). Groundwater depletion can also lead to significant land subsidence, which, in extreme cases as in the San Joaquin Valley of California, has reached values of 1.2 m, impacting pipelines and transport systems.…”

Section: Introductionmentioning

confidence: 99%

Groundwater Storage Changes: Present Status from GRACE Observations

et al. 2015

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Satellite gravity measurements from the Gravity Recovery and Climate Experiment (GRACE) provide quantitative measurement of terrestrial water storage (TWS) changes with unprecedented accuracy. Combining GRACE-observed TWS changes and independent estimates of water change in soil and snow and surface reservoirs offers a means for estimating groundwater storage change. Since its launch in March 2002, GRACE time-variable gravity data have been successfully used to quantify long-term groundwater storage changes in different regions over the world, including northwest India, the High Plains Aquifer and the Central Valley in the USA, the North China Plain, Middle East, and southern Murray-Darling Basin in Australia, where groundwater storage has been significantly depleted in recent years (or decades). It is difficult to rely on in situ groundwater measurements for accurate quantification of large, regional-scale groundwater storage changes, especially at long timescales due to inadequate spatial and temporal coverage of in situ data and uncertainties in storage coefficients. The now nearly 13 years of GRACE gravity data provide a successful and unique complementary tool for monitoring and measuring groundwater changes on a global and regional basis. Despite the successful applications of GRACE in studying global groundwater storage change, there are still some major challenges limiting the application and interpretation of GRACE data. In this paper, we present an overview of GRACE applications in groundwater studies and discuss if and how the main challenges to using GRACE data can be addressed.

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Section: Introductionmentioning

confidence: 99%

Groundwater Storage Changes: Present Status from GRACE Observations

et al. 2015

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“…Data from 2001 to 2010 show growing statewide water shortages, including large groundwater deficits even during wet years (Table 1); the 2012e15 California drought further stressed water resources (Griffin and Anchukaitis, 2014;Asner et al, 2016). Groundwater overdraft, which occurs when aquifer outputs (including groundwater extraction) persistently exceed inputs, has many negative consequences (Konikow and Kendy, 2005;Zektser et al, 2005;Werner et al, 2013;D€ oll et al, 2014). Overdraft has caused saltwater intrusion, subsidence, and permanent storage loss in California's aquifers (Galloway et al, 1998;Nenna et al, 2013;Faunt et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Coupling distributed stormwater collection and managed aquifer recharge: Field application and implications

Beganskas

Fisher

2017

Journal of Environmental Management

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“…changes in land use or land cover). While some others also looked at the associated changes in the water budget and resources (Wada et al, 2012;Famiglietti et al, 2011;Morrow et al, 2011;Rodell et al, 2007Rodell et al, , 2009Tiwari et al, 2009;Zhang et al, 2009;Yang et al, 2007;Konikow and Kendy, 2005) and showed increase of nonrenewable groundwater depletion and increase/decrease of river discharges in different regions.…”

Section: Introductionmentioning

confidence: 99%

Satellite-based analysis of recent trends in the ecohydrology of a semi-arid region

Gokmen

Vekerdy

Verhoef

et al. 2013

Hydrol. Earth Syst. Sci.

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Abstract. We present a regional framework for an integrated and spatiotemporally distributed assessment of human-induced trends in the hydrology and the associated ecological health of a semi-arid basin where both human activities (i.e. agriculture) and natural ecosystems are highly groundwater dependent. To achieve this, we analysed the recent trends (from year 2000 to 2010) in precipitation, evapotranspiration (actual and potential) and vegetation greenness (i.e. NDVI) using a combination of satellite and groundbased observations. The trend assessment was applied for the semi-arid Konya Basin (Turkey), one of the largest endorheic basins in the world.The results revealed a consistent increasing trend of both yearly evapotranspiration (totally 63 MCM yr −1 from croplands) and mean NDVI (about 0.004 NDVI yr −1 in irrigated croplands), especially concentrating in the plain part of the basin, while no significant trends were observed for the precipitation and potential evapotranspiration variables. On the contrary, a consistent decreasing trend of both yearly evapotranspiration (totally −2.1 MCM yr −1 ) and mean NDVI (−0.001 NDVI yr −1 ) was observed in the wetlands, which also cannot be explained by trends in precipitation and potential evapotranspiration. The emerging picture suggest that the greening trend of the vegetation and increasing of evapotranspiration in the plain are related to land cover changes (i.e. conversion into irrigated croplands) and to the intensification of the supplementary irrigation for agriculture, which in turn caused drying out of some wetlands and the natural vegetation which mostly depend on the groundwater, the main source of irrigation water as well.Our study presented an example of the utility of spatially and temporally continuous RS data in assessing the regional trends in hydrological and ecological variables and their interactions in a spatially distributed manner in a semi-arid region, which can also be adapted to other regions. Such spatiotemporally distributed analysis at the basin level is particularly important considering that most of the water management interventions also take place at this scale.

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Groundwater depletion: A global problem

Cited by 725 publications

References 5 publications

Groundwater Storage Changes: Present Status from GRACE Observations

Groundwater Storage Changes: Present Status from GRACE Observations

Coupling distributed stormwater collection and managed aquifer recharge: Field application and implications

Satellite-based analysis of recent trends in the ecohydrology of a semi-arid region

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