Identification of Pumping Influences in Long-Term Water Level Fluctuations

Harp, Dylan R.; Vesselinov, Velimir V.

doi:10.1111/j.1745-6584.2010.00725.x

Cited by 19 publications

(40 citation statements)

References 34 publications

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“…Also, a minimally parameterized analytical model (Theis 1935) was utilized in their research to estimate the T and S between each water-supply and monitoring borehole. However, the use of simple analytical solutions yields zero resolution on aquifer heterogeneity, but it is computationally efficient and able to provide fundamental insights into aquifer pressure responses (Harp and Vesselinov 2011). As concluded by Harp and Vesselinov (2011), analyses of existing hydrographs provided several significant advantages in characterizing aquifer properties compared with datasets generated through dedicated pumping tests.…”

Section: Introductionmentioning

confidence: 99%

“…However, the use of simple analytical solutions yields zero resolution on aquifer heterogeneity, but it is computationally efficient and able to provide fundamental insights into aquifer pressure responses (Harp and Vesselinov 2011). As concluded by Harp and Vesselinov (2011), analyses of existing hydrographs provided several significant advantages in characterizing aquifer properties compared with datasets generated through dedicated pumping tests. In particular, such records provide a large number of observations over time, which helps to minimize the effect of measurement errors.…”

Section: Introductionmentioning

confidence: 99%

“…Such pumping/injection events and hydrographs have not been analyzed, except by Harp and Vesselinov (2011). In particular, they analyzed individual hydrographs by simulating drawdowns in monitoring boreholes by decomposing pumping rate variations from water-supply boreholes.…”

Section: Introductionmentioning

confidence: 99%

“…For example, it is logistically infeasible to cease pumping/injection at a municipal well field to conduct a dedicated pumping test, considering that municipal water supply cannot be interrupted, and pressure influences induced by neighboring water-supply boreholes can affect results in uncertain ways (Harp and Vesselinov 2011). Yeh and Lee (2007) suggested that existing long-term pumping/injection events and water-level records within a municipal well field could be used for the estimation of hydraulic parameters.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, estimated parameters represent aquifer properties during existing pumping/ injection events and are helpful in predicting groundwater flow when planning and operating water-supply well fields. Harp and Vesselinov (2011) proposed a new approach for long-term hydrograph analysis, and they applied this approach to identify pumping influences of individual water-supply boreholes in water-level variations observed at monitoring boreholes using an approximately 5-year record from a field site in New Mexico, USA. Although several sets of T and S were obtained, those parameters were not validated in their study.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Automatic estimation of aquifer parameters using long-term water supply pumping and injection records

Luo

Illman

2016

Hydrogeol J

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Analyses are presented of long-term hydrographs perturbed by variable pumping/injection events in a confined aquifer at a municipal water-supply well field in the Region of Waterloo, Ontario (Canada). Such records are typically not considered for aquifer test analysis. Here, the water-level variations are fingerprinted to pumping/injection rate changes using the Theis model implemented in the WELLS code coupled with PEST. Analyses of these records yield a set of transmissivity (T) and storativity (S) estimates between each monitoring and production borehole. These individual estimates are found to poorly predict water-level variations at nearby monitoring boreholes not used in the calibration effort. On the other hand, the geometric means of the individual T and S estimates are similar to those obtained from previous pumping tests conducted at the same site and adequately predict water-level variations in other boreholes. The analyses reveal that long-term municipal water-level records are amenable to analyses using a simple analytical solution to estimate aquifer parameters. However, uniform parameters estimated with analytical solutions should be considered as first rough estimates. More accurate hydraulic parameters should be obtained by calibrating a three-dimensional numerical model that rigorously captures the complexities of the site with these data.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Automatic estimation of aquifer parameters using long-term water supply pumping and injection records

Luo

Illman

2016

Hydrogeol J

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Blind source separation for groundwater pressure analysis based on nonnegative matrix factorization

Alexandrov

Vesselinov

2014

Water Resources Research

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The identification of the physical sources causing spatial and temporal fluctuations of aquifer water levels is a challenging, yet a very important hydrogeological task. The fluctuations can be caused by variations in natural and anthropogenic sources such as pumping, recharge, barometric pressures, etc. The source identification can be crucial for conceptualization of the hydrogeological conditions and characterization of aquifer properties. We propose a new computational framework for model-free inverse analysis of pressure transients based on Nonnegative Matrix Factorization (NMF) method for Blind Source Separation (BSS) coupled with k-means clustering algorithm, which we call NMFk. NMFk is capable of identifying a set of unique sources from a set of experimentally measured mixed signals, without any information about the sources, their transients, and the physical mechanisms and properties controlling the signal propagation through the subsurface flow medium. Our analysis only requires information about pressure transients at a number of observation points, m, where m ! r, and r is the number of unknown unique sources causing the observed fluctuations. We apply this new analysis on a data set from the Los Alamos National Laboratory site. We demonstrate that the sources identified by NMFk have real physical origins: barometric pressure and water-supply pumping effects. We also estimate the barometric pressure efficiency of the monitoring wells. The possible applications of the NMFk algorithm are not limited to hydrogeology problems; NMFk can be applied to any problem where temporal system behavior is observed at multiple locations and an unknown number of physical sources are causing these fluctuations.

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Estimating aquifer properties using groundwater hydrograph modelling

Shapoori

Peterson

Western

et al. 2015

Hydrological Processes

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Abstract:Estimation of aquifer hydraulic properties is essential for predicting the response of an aquifer to extractions and hence estimating the availability of the groundwater resources. Aquifer tests are commonly used for the estimation of aquifer properties; however, they can be expensive and often only characterize the short-term response of the aquifer. This paper presents a time series modelling approach to estimating aquifer hydraulic properties. It is applied to 42 bores monitoring an unconfined aquifer within an irrigation region of south-eastern Australia, and the resulting probabilistic estimate of hydraulic properties are evaluated against pumping test estimates. It is demonstrated that the time series modelling can provide a reliable estimate of the hydraulic properties that are typical of a very long-term pumping test. Furthermore, the application of the time series modelling to 42 bores provided novel insights into the aquifer heterogeneity. We encourage others to further test the approach and the source code is available from: http://www.mathworks.com/matlabcentral/fileexchange/48546-peterson-tim-j-groundwaterstatistics-toolbox

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Identification of Pumping Influences in Long-Term Water Level Fluctuations

Cited by 19 publications

References 34 publications

Automatic estimation of aquifer parameters using long-term water supply pumping and injection records

Automatic estimation of aquifer parameters using long-term water supply pumping and injection records

Blind source separation for groundwater pressure analysis based on nonnegative matrix factorization

Estimating aquifer properties using groundwater hydrograph modelling

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