Part of a two volume set, this text contains the proceedings of the 12th Conference on Computational Methods in Water Resources, which was held in Greece in July 1998. It includes recent ideas in the development and applications of computational techniques to subsurface hydrology.

These volumes contain the proceedings of CMWR2002, which was hosted by the Faculty of Civil Engineering & Geosciences at Delft University of Technology. The interest in this meeting was truly overwhelming: around 230 papers from leading scientists were submitted and accepted for publication in the proceedings. The actual scope of the meeting was much broader than the title "Computational Methods in Water Resources" might suggest. Not only traditional hydrological topics like surface water and groundwater hydrology were covered, but also modern topics like coupled reactive transport, multiphase flow, pore-scale network modeling, remediation techniques, optimization, groundwater-surface water interactions and data assimilation. A quick glance through the Table of Contents of these two volumes immediately shows the richness of the material presented during the four days of the conference. New conceptual models, experimental methods, upscaling techniques and parameter estimation procedures were introduced. Nevertheless, the emphasis was still on the development of new accurate and robust computational techniques.

These volumes contain 160 papers covering a variety of topics, such as, groundwater and surface water flow and transport, multiphase flow, parameter estimation, scaling and heterogeneity, coastal and esturial flow, watershed modelling and advances in numerical methods.

Numerical methods provide a powerful and essential tool for the solution of problems of water resources. This book gives an elementary introduction to the various methods in current use and demonstrates that different methods work well in different situations and some problems requirecombinations of methods. It is essential to know something of all of them in order to make a reasoned judgement of current practice. Their applications are discussed and more specialised versions are outlined along with many references making this an invaluable, comprehensive coverage of thefield.