PUMPING TESTS AND HYDROGEOLOGICAL INVESTIGATIONS OF AN ARTESIAN AQUIFER NEAR HORSENS, DENMARK

1970 ◽  
Vol 1 (2) ◽  
pp. 69-110 ◽  
Author(s):  
L. J. ANDERSEN ◽  
Z. HAMAN
Keyword(s):  
Steady State ◽  
Pumping Test ◽  
Bearing Material ◽  
Clay Deposits ◽  
Glacial Outwash ◽  
Barometric Efficiency ◽  
Artesian Aquifer ◽  
Boulder Clay ◽  
Aquifer Properties ◽  
Lake Deposits

In the Egebjerg area, near Horsens, several aquifers consisting of glacial outwash material deposited in a glacial eroded buried valley in the Tertiary formation have been encountered. The lowest of these, which is the main productive aquifer, and which has leaky artesian conditions, has been investigated. The thickness of this aquifer varies from 10-40 m. The lower confining bed consists of boulder clay or meltwater clay underlain by boulder clay. The upper confining bed, where leakage occurs, consists of meltwater clay with thickness from 0 to 5 m. The upper meltwater deposits include a sequence of interglacial lake deposits and several layers or laminae of clay, which separate this water-bearing material into more aquifers with watertable or artesian conditions. In the eastern part of the area boulder clay deposits are found at the top of the sequence. The Theis modified non-equilibrium equation and its derived formula for the non-steady-state leaky artesian case have been used to determine aquifer properties from pumping test data. By means of Jacob's method and a logarithmic method, well characteristics are determined graphically. Barometric efficiency, reverse fluctuations, and boundary conditions are recorded and discussed.

scholarly journals A Contribution to the Analysis of Recovery Data for the Determination of the HydrauIic Properties of an Aquifer

1970 ◽  
Vol 37 ◽  
pp. 1-24
Author(s):  
Zvonimir Haman ◽  
Lars Jørgen Andersen
Keyword(s):  
Water Level ◽  
Hydraulic Properties ◽  
Pumping Test ◽  
Level Data ◽  
Water Level Data ◽  
Barometric Efficiency ◽  
Artesian Aquifer

The purpose of this paper is to present a more reliable calculation of hydraulic properties (T) and (S) utilizing recovery data instead of residual drawdown data. A useful formula for the computation of the recovery from the extrapolated drawdown is recommended. Practical data for this paper has been obtained from a pumping test in an artesian aquifer at Hvinningdal, Silkeborg, Denmark. The calculations are made by means of the nonequilibrium formulas of Theis and Jacob. In addition, the paper provides procedure and examples of adjustments of water-level data for barometric efficiency.

A Graphical Method for Storage Coefficient Determination from Quasi-Steady State Flow Data

1996 ◽  
Vol 27 (4) ◽  
pp. 247-254 ◽  
Author(s):  
Zekâi Şen
Keyword(s):  
Steady State ◽  
Graphical Method ◽  
Pumping Test ◽  
Quasi Steady State ◽  
Flow Data ◽  
Steady State Flow ◽  
Storage Coefficient ◽  
State Flow ◽  
Aquifer Test

A simple, approximate but practical graphical method is proposed for estimating the storage coefficient independently from the transmissivity value, provided that quasi-steady state flow data are available from a pumping test. In the past, quasi-steady state flow distance-drawdown data have been used for the determination of transmissivity only. The method is applicable to confined and leaky aquifers. The application of the method has been performed for various aquifer test data available in the groundwater literature. The results are within the practical limits of approximation compared with the unsteady state flow solutions.

scholarly journals Technical note: Analytical drawdown solution for steady-state pumping tests in two-dimensional isotropic heterogeneous aquifers

2016 ◽  
Vol 20 (5) ◽  
pp. 1655-1667 ◽  
Author(s):  
Alraune Zech ◽  
Sabine Attinger
Keyword(s):  
Steady State ◽  
Correlation Length ◽  
Heterogeneous Media ◽  
Radial Distance ◽  
Pumping Test ◽  
Two Dimensional ◽  
Aquifer Heterogeneity ◽  
Pumping Tests ◽  
Flow Solution ◽  
Ensemble Mean

Abstract. A new method is presented which allows interpreting steady-state pumping tests in heterogeneous isotropic transmissivity fields. In contrast to mean uniform flow, pumping test drawdowns in heterogeneous media cannot be described by a single effective or equivalent value of hydraulic transmissivity. An effective description of transmissivity is required, being a function of the radial distance to the well and including the parameters of log-transmissivity: mean, variance, and correlation length. Such a model is provided by the upscaling procedure radial coarse graining, which describes the transition of near-well to far-field transmissivity effectively. Based on this approach, an analytical solution for a steady-state pumping test drawdown is deduced. The so-called effective well flow solution is derived for two cases: the ensemble mean of pumping tests and the drawdown within an individual heterogeneous transmissivity field. The analytical form of the solution allows inversely estimating the parameters of aquifer heterogeneity. For comparison with the effective well flow solution, virtual pumping tests are performed and analysed for both cases, the ensemble mean drawdown and pumping tests at individual transmissivity fields. Interpretation of ensemble mean drawdowns showed proof of the upscaling method. The effective well flow solution reproduces the drawdown for two-dimensional pumping tests in heterogeneous media in contrast to Thiem's solution for homogeneous media. Multiple pumping tests conducted at different locations within an individual transmissivity field are analysed, making use of the effective well flow solution to show that all statistical parameters of aquifer heterogeneity can be inferred under field conditions. Thus, the presented method is a promising tool with which to estimate parameters of aquifer heterogeneity, in particular variance and horizontal correlation length of log-transmissivity fields from steady-state pumping test measurements.

scholarly journals Analysis of multi-well pumpingtest under atmosphere pressure and anisochronous schedule of pumping rate

2017 ◽  
pp. 50-58
Author(s):  
R. S. Shtengelov ◽  
E. A. Filimonova ◽  
I. S. Shubin
Keyword(s):  
Power Plant ◽  
Nuclear Power ◽  
Pumping Test ◽  
Hydraulic Parameters ◽  
Pumping Rate ◽  
Atmosphere Pressure ◽  
Barometric Efficiency ◽  
Groundwater Basin ◽  
Depression Cone

Interpretation problems of long-term anisochronous multi-well pumping test under oscillating atmosphere pressure is analyzed. The barometric efficiency and corrections of measured drawdowns are calculated to Udomlya groundwater basin, evaluation of space and temporal moving of depression cone is investigated. Obtained hydraulic parameters is used for numerical model of groundwater basin and forecasting of periodical compensation wells pumping for recharge lake-coolers of Kalininskaya Nuclear Power Plant.

Pleistocene vegetational history and geology in Norfolk, with an appendix on the non-marine mollusca from Swanton Morley

1976 ◽  
Vol 275 (937) ◽  
pp. 215-286 ◽  
Keyword(s):  
Picea Abies ◽  
Tree Pollen ◽  
Organic Layers ◽  
Pollen Diagrams ◽  
Deep Channel ◽  
Boulder Clay ◽  
Zone Ii ◽  
Organic Deposits ◽  
Lake Deposits

Three Ipswichian Interglacial sites are described, at Mundesley on the northeast Norfolk coast, and at Beetley and Swanton Morley in central Norfolk. Two Hoxnian Interglacial sites are also described, at Barford and Dunston, again in central Norfolk. Pollen diagrams from boreholes in channel sediments cutting the Contorted Drift at Mundesley span zones l b to III of the Ipswichian Interglacial, and a Devensian age for the Drift or for the ice movements producing the contortions must be discounted. ‘Cannonshot’ gravels at Beetley, considered to belong to the Wolstonian retreat, are overlain by organic layers indicating zone II of the Ipswichian Interglacial, and a Devensian interstadial. Interesting plant records include Damasonium alisma in the interglacial deposits, and Picea abies cf. ssp. obovata and Bruckenthalia spiculifolia in the interstadial beds. Fossils in organic deposits at Swanton Morley, late Wolstonian to early Devensian in age and pocketed in floodplain sands and gravels, include the exotic Acer monspessulanum , and mammalian bones referred to Ipswichian zone III. At Barford, organic lake deposits of the Hoxnian Interglacial overlie Anglian boulder clay which lies in a deep channel in the Chalk. The organic beds, which are of late Anglian to Hoxnian zone III age, are overlain in turn by solifluction deposits and by a cannonshot gravel attributed to the Wolstonian retreat. The high non-tree pollen phase recorded at Hoxne and Marks Tey in subzone Ho II c is also found here. Pollen from lake deposits at Dunston indicates subzone Ho III b and zone Ho IV, and there is palynological evidence for widespread erosion in zone Ho IV.

Feasibility of Monitoring Hydraulic Connections between Aquifers Using Time-lapse TEM: A Case History in Inner Mongolia, China

2019 ◽  
Vol 24 (3) ◽  
pp. 361-372
Author(s):  
Kang Chen ◽  
Junyan Zhang ◽  
Guoqiang Xue ◽  
Hao Huang ◽  
Weiying Chen ◽  
...  
Keyword(s):  
Case History ◽  
Inner Mongolia ◽  
Electromotive Force ◽  
Time Lapse ◽  
Pumping Test ◽  
Pumping Tests ◽  
Transient Electromagnetic ◽  
Successful Case ◽  
Aquifer Properties ◽  
Hydrogeological Data

Hydraulic connections between aquifers is usually studied through hydrochemical analysis or by pumping tests. However, hydrochemical analyses are usually conducted in areas of variable lithology. In addition, the hydrogeological data obtained by drilling and pumping tests are typically insufficient to get 3D distributions of hydraulic head. In this paper, the time-lapse transient electromagnetic method (TEM) is used to image groundwater migration between aquifers in Inner Mongolia, China. First, 1D geophysical models of aquifers are generalized according to the hydrogeological conditions of the region, and the feasibility of detecting the multiple aquifers by TEM is analyzed and discussed. Then, the 2D models of aquifers pre- and post- pumping test are established based on the distribution of groundwater in the aquifers, and the variation law of induced electromotive force measured on the surface is analyzed. The simulation results show that significant time-lapse electromagnetic anomalies can be observed between pre- and post- pumping test and the variation in the induced electromotive force reaches a distinguishable level between 0.7 ms and 100 ms due to the vertical change in the aquifer properties. Furthermore, the electromagnetic variation generated by hydraulic connection between aquifers is greater than 30% within the range of 3/4 of the transmitting loop. Finally, a successful case history to map hydraulic connections between aquifers is conducted using a time-lapse TEM pre- and post- a pumping experiment. This simulation and field experiment shows that time-lapse TEM could characterize and monitor the groundwater migration more effectively than pump tests or hydrogeochemical methods alone.

scholarly journals Assessment of shallow groundwater on the bank of the ISTN lake through lakebank filtration based on aquifer properties, pH, total dissolved solids (TDS), and microbiological analysis

2019 ◽  
Vol 276 ◽  
pp. 04011
Author(s):  
Syafalni Syafalni ◽  
Wawan Kuswaya ◽  
Wahyudi Marsiano ◽  
Dian Zulkafli
Keyword(s):  
Microbial Population ◽  
Groundwater Resources ◽  
Shallow Groundwater ◽  
Pumping Test ◽  
Total Dissolved Solids ◽  
Single Line ◽  
Microbiological Analysis ◽  
Test Results ◽  
Aquifer Properties ◽  
Normal Storage

A lakebank filtration assessment was carried out on the shallow groundwater surrounding the ISTN lake to evaluate of the shallow groundwater resources in the area. The objective of this research is to describe the shallow groundwater characteristics based on aquifer properties, pH, TDS and microbiological analysis. This research was conducted by making boreholes and observation holes at the bank of the ISTN area for 3 points in a single line perpendicular to the Lakebank together with 3 points in a single line perpendicular to the canalbank for doing the experiments and taking samples for pH, TDS, and microbiology analysis. Based on aquifer properties using boring and pumping test results, the aquifer layer with a thikness around 4 m show the normal storage coefficients between 0.00026 and 0.0316. From the pH, TDS, and microbiological analysis for sampling taken from boring 2.1, 2.2., and 2.3 with the distance around 10, 20, 30 m from the lake boundary were found in range of fresh water with zero patogent microbial population but the pH of some samples was lower than the pH of drinking water requirement in which that should be improved by using simple treatment before consumption.

scholarly journals Technical note: Analytical solution for the mean drawdown of steady state pumping tests in two-dimensional isotropic heterogeneous aquifers

2015 ◽  
Vol 12 (7) ◽  
pp. 6921-6944 ◽  
Author(s):  
A. Zech ◽  
S. Attinger
Keyword(s):  
Steady State ◽  
Analytical Solution ◽  
Correlation Length ◽  
Heterogeneous Media ◽  
Coarse Graining ◽  
Pumping Test ◽  
Two Dimensional ◽  
Aquifer Heterogeneity ◽  
Pumping Tests ◽  
Ensemble Mean

Abstract. A new method is presented which allows to interpret steady state pumping test in heterogeneous isotropic transmissivity fields. In contrast to mean uniform flow, the pumping test drawdowns in heterogeneous media cannot be described by a single effective or equivalent value of hydraulic transmissivity. A radially depending description of transmissivity is required, including the parameters of aquifer heterogeneity: mean, variance and correlation length. Such a model is provided by the upscaling procedure Radial Coarse Graining, which describes the transition of near well to far field transmissivity effectively. Based on the Radial Coarse Graining Transmissivity, an analytical solution for a steady state pumping test drawdown is derived. The so-called effective well flow solution is derived for two cases: the ensemble mean of pumping tests and the drawdown at an individual heterogeneous transmissivity field. The analytical form of the solution allows to inversely estimate the parameters of aquifer heterogeneity from pumping test data. This is shown making use of virtual pumping test data, for both cases the ensemble mean drawdown and pumping tests at individual transmissivity fields. The effective well flow solution reproduces the drawdown for two-dimensional pumping tests in heterogeneous media and is a promising tool to estimate parameters of aquifer heterogeneity, in particular for the horizontal correlation length.

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