Groundwater model views vs. experience in surface waters

The future use of the ground water models is viewed in the light of the highly successful surface water experiences. The key factors for progress in ground water applications are expected to include: Truly interactive coupling between the measurements and models. Simple but intelligent analysis of the field results aiming at understanding of their further meaning and of the real reasons for possible differences between the models and the measurements. Start from small-scale applications for real verification of the model validity and for proper directing of the model development to the most essential questions of the nature. Base of the models on the real decrees of nature, on universally valid elementary relations and on thinking of the causal dynamics as far as anything is known about them, Continuous further development of the models along with the applications - resulting usually quite soon in writing own model codes instead of fruitless fighting with the emerging mysteries, stiffness and limitations of the commercial computer programs. Close co-operation between people with different emphases, backgrounds and responsibilities including persons mainly interested in measurements, their interpretation, model development, decision making and in planning. Practical problems to be solved from the very beginning of the model work in order to force the results to be completed in time and to get the models involved in the most acute needs of planning and decision making at an early stage of their development