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Analytical solution for the recovery tests after constant-discharge tests in confined aquifers Abstract ABDON ATANGANA Institute for Groundwater Study, Faculty of Natural and Agricultural Sciences, University of The Free State, Bloemfontein, 9301, South Africa abdonatangana@yahoo.fr In this paper we provide a new analytical solution for residual drawdown during the recovery period after constant rate pumping test. We first compare the proposed solution with the existing solution, secondary we compare the solution with experimental data from field observation. The analytical solution is in perfect agreement with the experimental data for than Cooper Jacob solution. We derive a new analytical solution for determination of the skin factor without any restriction on the variables t and t , . We present an analytical solution for the drawdown response in a confined aquifer that is pumped step-wise or intermittently at different discharge rate on basis of this solution we derive an analytical solution to analyse the residual drawdown data after pumping test with step-wise or intermittently changing discharge rates. Keywords: Recovery equations, residual drawdown, skin factor, Variable discharges Page 24 1- G.P. Kruseman and N.A. de Ridder. (1994) Analysis and Evaluation of PumpingTest Data 2- Theis, C.V. 1935. The relation between the lowering of the piezometric surface and the rate and duration of discharge of well using groundwater storage. Trans. Amer. Geophys. Union, Vol. 16, pp. 5 19- 524. 3-Jacob, C.E. 1940. On the flow of water in an elastic artesian aquifer. Trans. Amer. Geophys. Union, Vol.21, Part 2, pp. 574-586. 4-Jacob, C.E. 1944. Notes on determining permeability by pumping tests under water table conditions. U.S.Geol. Surv. open. file rept. 5-Jacob, C.E. 1947. Drawdown test to determine effective radius of artesian well. Trans. Amer. Soc. of Civil. Engrs., Vol. 112, Paper 2321, pp. 1047-1064. 6- A. Atangana and E. Alabaraoye (2012) Groundwater flow described by prolate spheroid coordinates and new analytical solution for flow model in a confined aquifer under Theis conditions. Paper accepted for publication in AMMS 7-Ramey, H. J. (1982) Well loss function and the skin effect: A review. In: Narasimhan, T.N., (ed) Recent trends in hydrogeology, Geol. Sos. Am, Special paper 189, 265-271 8- De Marsily G. (1986) Quantitative hydrogeology. Academic Press, London, 440 9- Matthews, C.S and D. G. Russell. (1967) Pressure build up and flow tests in wells. Soc. Petrol. Engrs. Of Am. Inst. Min. Met. Engrs., Monograph 1, 67 10- Birsoy V. K. And Summer W. K, (1980) Determination of aquifer parameters from step tests and intermittent pumping data. Groundwater
Bright and dark soliton solutions for the variable coe¢ cient generalizations of the KP equation Ahmet Bekir a , Özkan Güner a , Adem Cengiz Çevikel b a Eskisehir Osmangazi University, Art-Science Faculty, Department of Mathematics and Computer Science, Eskisehir-TURKEY b Yildiz Technical University, Faculty of Education, Department of Mathematics Education, Istanbul-TURKEY, Email : abekir@ogu.edu.tr; ozkanguner@hotmail.com; acevikel@yildiz.edu.tr July 12, 2012 Abstract In this paper, by using a solitary wave ansatz in the form of sech p and tanh p functions, we obtain the exact bright (non-topological) and dark (topological) soliton solutions for the variable coe¢ cient generalizations of the KP (GVCKP) equation, respectively. Note that, it is always useful and desirable to construct exact analytical solutions especially soliton-type envelope for the understanding of most nonlinear physical phenomena. The physical parameters in the soliton solutions are obtained as functions of the dependent coe¢ cients. Keywords: Solitons, bright and dark soliton, variable-coe¢ cient generalizations of the KP (GVCKP) equation References PACS (2006) : 02.30 Jr, 02.70 Wz, 05.45 Yv, 94.05 Fg. [1] M.J., Ablowitz, H., Segur, Solitons and inverse scattering transform, SIAM, Philadelphia, (1981). [2] W., Mal‡iet, W., Hereman, The tanh method. I: Exact solutions of nonlinear evolution and wave equations, Physica Scripta, 54 (1996) 563-568. [3] A.M.,Wazwaz, The tanh method for travelling wave solutions of nonlinear equations, Applied Mathematics and Computation, 154, 3 (2004) 713-723. [4] S.A., El-Wakil, M.A., Abdou, New exact travelling wave solutions using modi…ed extended tanh-function method, Chaos, Solitons & Fractals, 31, 4, (2007) 840- 852. Corresponding Author. Tel.: +90 222 2393750; Fax: +90 222 2393578. E-mail address: abekir@ogu.edu.tr (A.Bekir) 1 Page 25
Page 3 and 4: TABLE OF CONTENTS P a g e | i Shado
Page 5 and 6: P a g e | iii Sturm Liouville Probl
Page 7 and 8: P a g e | v Real Time 3D Palmprint
Page 9 and 10: ��
Page 11 and 12: Abstract On the Classifications of
Page 13 and 14: A Note on the Numerical Solution of
Page 15 and 16: Abstract A Third-Order of Accuracy
Page 17 and 18: Boundary Value Problem for a Third
Page 19 and 20: [18] S. G. Krein, Linear Differenti
Page 21 and 22: Positivity of Two-dimensional Ellip
Page 23 and 24: On the Numerical Solution of Ultra
Page 25 and 26: Abstract Optimal Control Problem fo
Page 27 and 28: On Stability Of Hyperbolic- Ellipti
Page 29 and 30: Abstract FUZZY CONTINUOUS DYNAMICAL
Page 31: [10] D.L. DeAngelis, R.A. Goldstein
Page 35 and 36: [22] H., Triki, A.M.,Wazwaz, Bright
Page 37 and 38: [5] Khadjiev Dj., Çavu¸s A., Four
Page 39 and 40: Paths of Minimal Length on Suborbit
Page 41 and 42: On A SUBCLASS OF UNIVALENT FUNCTION
Page 43 and 44: Approximation by Certain Linear Pos
Page 45 and 46: PARABOLIC PROBLEMS WITH PARAMETER O
Page 47 and 48: On the Numerical Solution of a Diff
Page 49 and 50: [3] Y. Ma, and Y. Ge, Applied Mathe
Page 51 and 52: A Fuzzy Approach to Multi Objective
Page 53 and 54: Derivation and numerical study of r
Page 55 and 56: [11] G.A. Baker, P. Graves-Morris,
Page 57 and 58: Three Models based Fusion Approach
Page 59 and 60: The normal inverse Gaussian distrib
Page 61 and 62: Compact and Fredholm Operators on M
Page 63 and 64: Abstract Extended Eigenvalues of Di
Page 65 and 66: A New General Inequality for double
Page 67 and 68: Exact Solutions of the Schrödinger
Page 69 and 70: [9] Titeux I., Yakubov Y., Complete
Page 71 and 72: Positivity of Elliptic Difference O
Page 73 and 74: Transient and Cycle Structure of El
Page 75 and 76: Abstract Characterizations of Slant
Page 77 and 78: Page 69 [20] Struik, D. J., Differe
Page 79 and 80: Applied Mathematics Analysis of the
Page 81 and 82: Multibody Railway Vehicle Dynamics
Page 83 and 84:
Existence of Global Solutions for a
Page 85 and 86:
On the stability of the steady-stat
Page 87 and 88:
On the Numerical Solution of Diffus
Page 89 and 90:
Using expanding method of (G ′ /G
Page 91 and 92:
Weighted Bernstein Inequality for T
Page 93 and 94:
Abstract An Application on Suborbit
Page 95 and 96:
On The First Fundamental Theorem fo
Page 97 and 98:
Abstract Almost Convergence and Gen
Page 99 and 100:
Forecast results in contrast with o
Page 101 and 102:
Page 93 [15] M. El-Shahed, A. Salem
Page 103 and 104:
yields a system of equations which
Page 105 and 106:
Abstract Application of the Trial E
Page 107 and 108:
Oscillation Theorems for Second-Ord
Page 109 and 110:
Abstract On Hadamard Type Integral
Page 111 and 112:
A geometrical approach of an optima
Page 113 and 114:
A Perturbation Solution Procedure f
Page 115 and 116:
Solution of Differential Equations
Page 117 and 118:
Aproximation Properties of a Genera
Page 119 and 120:
Blow up of a solution for a system
Page 121 and 122:
A Note on Some Elementary Geometric
Page 123 and 124:
Abstract Solving Crossmatching Puzz
Page 125 and 126:
Polygonal Approximation of Digital
Page 127 and 128:
Panoramic Image Mosaicing Using Mul
Page 129 and 130:
[9] Naimark, M. A. Linear Differant
Page 131 and 132:
Abstract Chaos in cubic-quintic non
Page 133 and 134:
Semismooth Newton method for gradie
Page 135 and 136:
Multiple solutions for quasilinear
Page 137 and 138:
The Modified Bi-quintic B-spline ba
Page 139 and 140:
The Modified Kudryashov Method for
Page 141 and 142:
Study of an inverse problem that mo
Page 143 and 144:
Abstract Finding Global minima with
Page 145 and 146:
PARAMETER DEPENDENT NOVIER-STOKES L
Page 147 and 148:
7. D. J. Fyfe, The use of cubic spl
Page 149 and 150:
Page 141 An error correction method
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Classification of exact solutions f
Page 153 and 154:
Abstract Numerical Solution of a Hy
Page 155 and 156:
generalized hyperbolic tangent func
Page 157 and 158:
EQUIVALENCE OF AFFINE CURVES Yasemi
Page 159 and 160:
Modified trial equation method for
Page 161 and 162:
Normal Extensions of a Singular Dif
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