Ground‐Water Computer Models — State of the Arta

Abstract

ABSTRACTThis paper addresses both the pros and cons of ground‐water modeling and is presented from a neutralist's standpoint. The list of individual modeling pros and cons is extensive but is condensed into three main points for each side of the ledger.The three main characteristics that put the use of ground‐water models into the class of intellectual toys are as follows. First, the wrong model is frequently chosen for problem solving of which overkill by use of an overly sophisticated model is an example. Secondly, the paying agency or client is often disillusioned with the model results because of frequent modeler oversell in the early stages of project planning and budgeting. Thirdly, the problems are often solved with a numerical code that is a mystery to all except the modeler himself.The three main characteristics that make ground‐water models very practical tools are as follows. First, there is no doubt that the models of today can solve extremely complex ground‐water flow problems. Having methods available for solution of complex problems is an advantage that we have not always had Secondly, the models of today are available to virtually everyone in the ground‐water business. The days of specialty laboratories for complex ground‐water model solving are over and the tools are now in the hands of those doing the local work. And thirdly, having a computer code and data deck available is a perfect tool for transferring information to another person as to how a problem was solved. There is no doubt as to the exact assumptions used and the step‐by‐step solution of the problem which produces the results of the entire analysis.This paper also includes a very brief description of the state‐of‐the‐art of ground‐water modeling and a very comprehensive reference list of useable models.