Preface. Tutorial on Inverse Problems. 1. An Introduction to Inverse Problems in Partial Differential Equations for Engineers, Physicists and Mathematicians; P. DuChateau. Hydrology. 2. Interpretation of Field Tests in Low Permeability Fractured Media. Recent Experiences; J. Carrera, et al. 3. New Front Limitation Algorithm; F. Hafner, et al. 4. Identification and Reduction of Model Structure for Modeling Distributed Parameter Systems; N.-Z. Sun. 5. Results from a Comparison of Geostatistical Inverse Techniques for Groundwater Flow; D.A. Zimmerman, et al. Nonlinear Diffusion and Soil Physics. 6. Identification of the Hydraulic Diffusivity of a Soil by Inverse Method with Dual-Energy Gamma Ray Attenuation Measurements; F. Barataud, et al. 7. Identification of Parameters for Heat Conductivity Equations; N.D. Botkin. 8. Sensitivity Analysis in Parameter Identification, Test Planning and Test Evaluation Procedures for Two-Phase Flow in Porous Media; O. Kemmesies, L. Luckner. 9. An Inverse Problem for Porous Medium Equation; R. Nabokov. 10. Evaluation of Different Boundary Conditions for Independent Determination of Hydraulic Parameters Using Outflow Methods; T. Zurmuhl. Geophysical Methods. 11. Gravity Data Inversion Using Subspace Method; M. Mirzaei, et al. 12. Method to Determine Parameters of a Linear Functional Equations Set and its Application to a Lightning Location Problem; H.J.S. Dorren, R.K. Snieder. 14. Identifiability of Distributed Physical Parameters; S. Handrock-Meyer. 15. InverseScattering Problem for the Wave Equations and its Applications; L.P. Nizhnik. 16. A Descriptive Regularization Approach for a Class of Ill-Posed Nonlinear Integral Equations; T. Schroeter, B. Hofmann. 17. Parameter Estimation in Nonlinear Models by Using Total Least Squares; W.J.H. Stortelder. 18. Tikhonov Regularization for Identification Problems in Differential Equations; U. Tautenhahn. Parallel Algorithms for Inverse Problems. 19. Parameter Estimation in Multispecies Transport Reaction Systems Using Parallel Algorithms; M.W. Ziesze, et al. 20. On Design and Implementation of Parallel Algorithms for Solving Inverse Problems; W. Zimmermann, et al.