Changes to inter-aquifer exchange resulting from long-term pumping: implications for bedrock groundwater recharge

Cognac, Kristen E.; Ronayne, Michael J.

doi:10.1007/s10040-020-02141-x

Cited by 9 publications

(9 citation statements)

References 39 publications

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“…The flow rate of seepage wells increased concomitantly with the shaft drawdown. When the drawdown was excessive, partial disconnection of the groundwater recharge may occur, which affected the flow rate of seepage wells (Cognac & Ronayne 2020). Figure 5 (b) shows the high responsiveness between the pumping flow rate and the drawdown of the shaft.…”

Section: Resultsmentioning

confidence: 99%

“…This study provided evidence that the water yield of seepage wells increases with increments in the drawdown of the shaft, but the growth speed decreases (Figure 5). The reason is that a disconnection zone (unsaturated zone) between the river and groundwater would occur when the drawdown of the shaft is increased to some extent and the pumping flow is too large, whilst the growth speed of the water yield decreases (Cognac & Ronayne 2020). Therefore, the water yield of seepage wells under different depth reduction conditions was simulated.…”

Section: Applicability Of the Model And Determination Of Maximum Pumping Drawdownmentioning

confidence: 99%

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In-situ pumping tests and numerical simulations of seepage wells in the Yellow River valley, China

Wang

et al. 2021

Water Supply

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Seepage wells that can convert surface water into groundwater are often constructed near the river valley to obtain more water and lead to smaller drawdown comparing with traditional wells. Seepage wells have been widely used, whilst the groundwater and river level variations caused by seepage wells are still unclear, and numerical models are rarely verified due to the lack of in-situ observation data, which may lead to the results are quite different from the actual conditions. To address those limitations, a large-scale pumping test was carried out near the Yellow River valley in China and a coupled seepage-pipe flow model was established using the exchange yield between the aquifer and pipe as the couple key in this research. The coupled model was evaluated with in-situ measurement. The field observation showed that both the river and groundwater had a positive response to the pumping of the seepage wells. The simulation results indicated that our model can well estimate the pumping rate and drawdown with root-mean-square deviations of 158.235 m3/d and 0.766 m, respectively. Further, it is also found that the groundwater showed the obvious characteristics of three-dimensional flow under the influence of seepage wells and the maximum drawdown should be less than 15 m to ensure exploitation efficiency. These findings provide important information that can guide the design and construction of seepage wells to improve the rational exploitation of groundwater.

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Section: Resultsmentioning

confidence: 99%

Section: Applicability Of the Model And Determination Of Maximum Pumping Drawdownmentioning

confidence: 99%

In-situ pumping tests and numerical simulations of seepage wells in the Yellow River valley, China

Wang

et al. 2021

Water Supply

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“…Surficial shallow aquifers are vulnerable to anthropogenic contamination due to urbanization, industrialization, and agriculture. Under favorable conditions, the shallow aquifer's contaminated water can migrate into an underlying semi-confined aquifer [5 , 20] . Therefore, in groundwater systems that comprise a series of unconsolidated aquifers and their aquitards, inter-aquifer exchange between aquifers can influence the water quality [25] .…”

Section: Methods Detailsmentioning

confidence: 99%

Groundwater well optimization to minimize contaminant movement from a surficial shallow aquifer to a lower water supply aquifer using stochastic simulation-optimization modeling techniques: Strategy formulation

et al. 2022

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“…Numerical modeling of inter-aquifer water exchange is commonly difficult because of the varying methods for characterizing the heterogeneity leading to the exchange [15,16], the disconnections between surface water and alluvial aquifer water from deeper aquifer systems [17], and changes in inter-aquifer water exchange with pumping [18,19].…”

Section: Introductionmentioning

confidence: 99%

Development of a Numerical Multi-Layered Groundwater Model to Simulate Inter-Aquifer Water Exchange in Shelby County, Tennessee

Villalpando-Vizcaino

Waldron

Larsen

et al. 2021

Water

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Inter-aquifer water exchange between the shallow and Memphis aquifers in Shelby County, Tennessee may pose a contamination threat due to the downward migration of younger, poor quality groundwater into deeper, more pristine aquifer. Discontinuities (breaches) in the upper Claiborne confining unit (UCCU) allow for leakage into the Memphis aquifer, a sand-dominated aquifer that provides about 95% of the groundwater used in the Memphis area. This study created a multi-layered 3D groundwater model for Shelby County using the United States Geological Survey’s MODFLOW-NWT program to evaluate water exchange for a simulation period from January 2005 to December 2016. Results indicate an overall leakage through the UCCU of 61 m3/min into the Memphis aquifer in Shelby County, accounting for 10% of its water budget inflow, with localized areas experiencing as much as 20% water exchange. As young water tends to stay in the upper part of the Memphis aquifer, water budget assessment for the upper 60 m of the Memphis aquifer revealed leakage representing 29% of the zone inflow, and as much as 53% in certain areas. More localized studies must be conducted to understand the location, characteristics, and orientation of the confining unit breaches, as well as the inter-aquifer water exchange.

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Changes to inter-aquifer exchange resulting from long-term pumping: implications for bedrock groundwater recharge

Cited by 9 publications

References 39 publications

In-situ pumping tests and numerical simulations of seepage wells in the Yellow River valley, China

In-situ pumping tests and numerical simulations of seepage wells in the Yellow River valley, China

Groundwater well optimization to minimize contaminant movement from a surficial shallow aquifer to a lower water supply aquifer using stochastic simulation-optimization modeling techniques: Strategy formulation

Development of a Numerical Multi-Layered Groundwater Model to Simulate Inter-Aquifer Water Exchange in Shelby County, Tennessee

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