The inverse problem for confined aquifer flow: Identification and estimation with extensions

1987 ◽  
Vol 23 (1) ◽  
pp. 92-104 ◽  
Author(s):  
Hugo A. Loaiciga ◽  
Miguel A. Mariño
Keyword(s):  
Inverse Problem ◽  
Confined Aquifer ◽  
Aquifer Flow

scholarly journals A Finite Element Aquifer Model which takes into Account Elevation Changes of the Aquifer

1978 ◽  
Vol 9 (3-4) ◽  
pp. 173-186 ◽  
Author(s):  
Jukka Aalto
Keyword(s):  
Finite Element ◽  
Computer Program ◽  
Middle Surface ◽  
Surface Element ◽  
Element Formulation ◽  
Confined Aquifer ◽  
Programming Effort ◽  
Elevation Changes ◽  
Isoparametric Finite Elements ◽  
Aquifer Flow

A finite element formulation for confined aquifer flow, which takes into account elevation changes of the aquifer is presented. The middle surface of the aquifer is assumed not as a horizontal plane but as a curved surface. The theory of isoparametric finite elements is applied to develop a general isoparametric surface element for the problem. The presented technique can, with little additional programming effort, be incorporated into any standard finite element computer program for solving the two-dimensional quasi-harmonic differential equation (i.e. equation governing heat conduction, electric potential, seepage through porous media etc.) A computer program using a four node quadrilateral surface element has been developed. Some results of two examples analyzed using this program are finally established.

On the solution of confined aquifer flow equations: finite difference approximations

2013 ◽  
Vol 7 ◽  
pp. 2885-2896
Author(s):  
Okiro J. O. ◽  
Manyonge A. W. ◽  
Ongati N.O. ◽  
Shichikha J. M. ◽  
Kimaiyo J. K.
Keyword(s):  
Finite Difference ◽  
Confined Aquifer ◽  
Flow Equations ◽  
Finite Difference Approximations ◽  
Difference Approximations ◽  
Aquifer Flow

scholarly journals Analisis Aliran Air Bawah Permukaan Dengan Menggunakan Metode Geolistrik

2019 ◽  
Vol 2 (4) ◽  
pp. 111-116
Author(s):  
Muhammad Ragil Setiawan ◽  
Bilal Al Farishi ◽  
Lea Kristi Agustin
Keyword(s):  
Flow Direction ◽  
Subsurface Layer ◽  
Subsurface Water ◽  
Clean Water ◽  
Confined Aquifer ◽  
Average Depth ◽  
Clay Layer ◽  
Lower Limits ◽  
Subsurface Modeling ◽  
Aquifer Flow

Cean water is needed in a human community. The need for clean water can be taken from subsurface water through a pumping process. Efforts to get clean water that has sustainability can be done by knowing the direction of the aquifer flow. The direction of the aquifer flow can be known through subsurface modeling. This study uses the geoelectric method in modeling the subsurface layer to determine the position of the aquifer. Based on the subsurface model, the average depth of an aquifer is between 30-100 meters. The subsurface model shows the type of aquifer depressed with a clay layer as the upper and lower limits of the aquifer. The subsurface water is estimated to have a flow direction from East to West in a confined aquifer.

AN INVERSE PROBLEM IN THE DYNAMICAL REATOR THEORY

1982 ◽  
Vol 2 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Dexing Feng ◽  
Guangtian Zhu
Keyword(s):  
Inverse Problem

REDUCED MODEL OF PLASMA DISCHARGE CONTROL IN TOKAMAK WITH IRON CORE

2020 ◽  
Vol 7 (3) ◽  
pp. 11-22
Author(s):  
VALERY ANDREEV ◽  
◽  
ALEXANDER POPOV
Keyword(s):  
Optimal Control ◽  
Inverse Problem ◽  
Optimal Control Problem ◽  
Control Problem ◽  
Nonlinear Behavior ◽  
Plasma Discharge ◽  
Reduced Model ◽  
Iron Core ◽  
Power Sources ◽  
Real Power

A reduced model has been developed to describe the time evolution of a discharge in an iron core tokamak, taking into account the nonlinear behavior of the ferromagnetic during the discharge. The calculation of the discharge scenario and program regime in the tokamak is formulated as an inverse problem - the optimal control problem. The methods for solving the problem are compared and the analysis of the correctness and stability of the control problem is carried out. A model of “quasi-optimal” control is proposed, which allows one to take into account real power sources. The discharge scenarios are calculated for the T-15 tokamak with an iron core.

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