63-Challenges in Hydrological Modelling—Simplicity vs. Complexity.

Abstract

Hydrological modeling is a challenging task nowadays because of the multi-faceted nature of the problem and the various choices available. There has been a proliferation of models and modeling techniques in the past few decades, and as a result, it is confusing even to an experienced hydrologist. There are simple models, not so simple models, complex models and more complex models with each type having its own pros and cons. There are those who consider the end result more important than the method used to arrive at it and there are also those who consider otherwise. There is no unique approach or model that suits all and all purposes. In this paper, the author attempts to highlight some criteria for the choice of a model, limitations of different types of models including calibration issues, and a comparison of a few types of models in terms of the resource costs and the marginal benefits.