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Friday, July 31, 2020 | History

2 edition of Numerical modelling of pumping tests in unconfined aquifers found in the catalog.

Numerical modelling of pumping tests in unconfined aquifers

Ian Timothy Brown

Numerical modelling of pumping tests in unconfined aquifers

by Ian Timothy Brown

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  • 20 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D) - University of Birmingham, School of Civil Engineering, Faculty of Engineering, 1997.

Statementby Ian Timothy Brown.
ID Numbers
Open LibraryOL17248951M

Hydrogeology (hydro-meaning water, and -geology meaning the study of the Earth) is the area of geology that deals with the distribution and movement of groundwater in the soil and rocks of the Earth's crust (commonly in aquifers).The terms groundwater hydrology, geohydrology, and hydrogeology are often used interchangeably.. Groundwater engineering, another name for hydrogeology, is a branch. Hydraulic Parameter Identification: Generalized Interpretation Method for Single and Multiple Pumping Tests, Springer-Verlag, Heidelberg, pp. figs and 36 tabs (ISBN ). At the end of this web site further references are given in which the author treats some part of the hydraulic parameter identification problem.

Slug tests. Confined aquifers, unsteady-state flow Coopers method Uffinks method for oscillation tests Unconfined aquifers, steady-state flow Bouwer-Rices method. 24 1 Uniformly-fractured aquifers, double-porosity concept. /5(1). 1 Introduction. Currently, coastal aquifers worldwide are under increasing threat of seawater intrusion (SWI) [Ferguson and Gleeson, ; Werner et al., ].SWI is a phenomenon where seawater encroaches into a coastal aquifer and contaminates fresh groundwater [Bear, ].The occurrence of SWI is most commonly associated with the penetration of seawater within the lower domain of a Cited by:

Hydrogeology Bundle: Part 3 Seawater Intrusion Modeling – How to Set up, Run and Visualize with SEAWAT Numerical Model. Due to rapid urban development, climate change, intense agriculture and other factors shallow unconfined aquifers in a lot of coastal regions have become highly vulnerable to contamination from sea water intrusions. A typical numerical model for flow and transport of heat and nonconservative solutes in fractured rock is the TRAFRAP-WT code developed for the International Ground Water Modeling Center (Huyakorn et al. ) This code is a two-dimensional finite-element code capable of .


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Numerical modelling of pumping tests in unconfined aquifers by Ian Timothy Brown Download PDF EPUB FB2

Numerical Groundwater Flow and Contaminant Transport Modelling of the Southern Aquifer, Mauritius Book The five main aquifers of Mauritius are: of an unconfined layer. Two. These numerical simulations have proved to be suitable for reproducing groundwater flow during a pumping test, to corroborate hypotheses concerning unconfined or semi-confined aquifers and even to.

United States Government Printing Office. Washington, D.C. Neuman, S. Theory of Flow in Unconfined Aquifers Considering Delayed Response of the Water Table.

Water Resources Research. Vol. 8, No 4, pp. Neuman, S. Effects of Partial Penetration on Flow in Unconfined Aquifers Considering Delayed Gravity Response. The locations of pumping/injection wells in each group of pumping tests are selected according to Illman.

Well spacing optimization is outside of the scope of this study [ 20, 21, 22 ]. The rate is cm 3 /s for both pumping and injection for all 8 pumping tests, and it Author: Yuefen Zhang, Chuanhao Wu, Bill X. Hu, Tian-Chyi Jim Yeh, Yimin Hao, Wenhan Lv. The classical Dupuit–Forchheimer approach, commonly used in analysing unconfined groundwater-flow systems, relies on the assumption of a negligible vertical component of the flow.

This approximation is valid only when the convergence of streamlines is very limited and the drawdown of the phreatic surface is small, or the thickness of the horizontal layer of the heterogeneous aquifers is Cited by: 1. Flow to partially penetrating wells in unconfined heterogeneous aquifers: Mean head and interpretation of pumping tests, Water resources research, Vol.

47, [3] Peaceman, D.W., Interpretation of well-block pressures in numerical reservoir simulation with no square grid blocks and anisotropic permeability, SPE J.

23 – [4]Cited by: 1. A numerical modelling and neural network approach to estimate the impact of groundwater abstractions on river flows. (excluding the period over which the pumping tests were carried out). A 2nd order regression line was fitted, and adjusted for the period of the pumping test to correspond to the flow value at the start of the pumping test Cited by: Well hydraulics, two dimensional flow, steady and unsteady state flow in confined, unconfined and semi-confined aquifers, steady flow in sloping aquifers, partial penetrating wells.

Analysis of multi-aquifers. UNIT III. Flow analysis in interfering wells. Pumping tests and determination of aquifer parameters. UNIT IV. A contamination by petroleum hydrocarbons was detected in a sandy aquifer below a petrochemical plant in Southern Italy. The site is located near the coastline and bordered by canals which, together with pumping wells, control submarine groundwater discharge toward the sea and seawater intrusion (SWI) inland.

In this study, a three-dimensional flow and transport model was Cited by:   This study offers a reinterpretation of archive aquifer tests, predominantly on the basis of recovery data, from an original datasheet of thermal water wells located in carbonate and sandstone aquifer units in the vicinity of Budapest, Hungary.

The study compares the hydraulic conductivity (K) and specific storage (Ss) values derived in the first instance from an aquifer test : Tamás Garamhegyi, Ferenc Székely, J.

Joel Carrillo-Rivera, Judit Mádl-Szőnyi. 12 Numerical Modelling Insights Introduction Representation of Rivers Intermittent rivers Representing Boreholes Pumping Water from Multi-layered Aquifers Time-Instant Conditions Introduction Basis of time-instant approach Examples of sandstone and limestone.

A pumping test should also measure the changes in water level after the pump stops (see Figure 2). The information collected during this recovery period will verify the results of the pumping test.

Guide to Conducting Pumping Tests. Pumping tests, epa guidance Multiple-well, constant discharge pumping tests, unconfined aquifers. CAN ACCOUNT FOR METHOD Flow Conditions Partial Penetration Other ADDITIONAL ASSUMPTIONS AND CONDITIONS ANALYSIS/ PROCEDURES REMARKS t> x10& 3 r 2 c Ô r> 3 00& rw Thiem- Dupuit's Method, (Thiem, ) (b) Steady state No Velocity of flow is.

To accurately revise the drawdown data of the pumping test, some studies have been conducted. Liu () derived an analytical solution that described the combined effects of periodic tidal forcing and steady pumping on the groundwater level fluctuation of a confined aquifer.

This solution showed that, under the combined effects of tide forcing and groundwater pumping, the pressure head of a Cited by: 1. A solution is obtained for stream flow depletion created by pumping from a well beside a stream. This solution assumes that streambed penetration of the aquifer and dimensions ofCited by: () Modeling slug tests in unconfined aquifers taking into account water table kinematics, wellbore skin and inertial effects.

Journal of Hydrology() Transport of Mecoprop through Mercia Mudstone and Oxford Clay at the laboratory by: In this study, deep aquifer pumping tests were performed at six locations in order to determine the hydraulic properties of the aquifers.

The tests also provide information about the yield and drawdown of the well and other basic information for the solution of many regional and. Modelling of Groundwater Flow and Data Requirements C.

Kumar Scientist ‘F’ National Institute of Hydrology Roorkee –India [email protected] Abstract Groundwater is used for a variety of purposes, including irrigation, drinking and manufacturing. Groundwater is also the source of a large percentage of surface water.

Assessment of Groundwater Modeling Approaches for Brackish Aquifers Final Report Prepared by Neil E. Deeds, Ph.D., P.E.

Toya L. Jones, P.G. Prepared for: Texas Water Development Board P.O. BoxCapitol Station Austin, Texas November File Size: 13MB.

Digital modeling of karst aquifers has had poor success for several reasons. Aquifer-wide details of karst hydraulics are poorly known. Nearly all numerical groundwater models are designed only for laminar flow, and even when turbulent-flow conduit modules are added, it is very difficult to predict well yields, flow directions, flow velocities and contaminant transport because of the local.

Numerical shape factors for field permeability tests in unconfined aquifers. Paper presented at the 70th Canadian Geotechnical Conference, Ottawa, Ontario (8 pages). Numerical modelling of the Guelph permeameter test using the complete unsaturated hydraulic functions of the soil.

Pumping tests in a reduced-scale fully controlled.abstraction. They have developed a numerical model in the cases of steady and unsteady states of flow in both confined and unconfined aquifers. Rai [16] deduced a numerical model to determine the aquifer constants. He proved that the model accuracy is of the same order as of the graphical methods.

Lafe.AbstractThe hydraulic characteristics of aquifers in Lokoja and Patti Formations were investigated using combination of vertical electrical sounding (VES), pumping and laboratory tests.

A total of 20 VES (10 each in areas underlain by Lokoja and Patti Formations) were carried out at different locations with 5 pumping tests around VES stations in order to determine the geoelectric layers Cited by: 1.