Abstract
Hydrologic flow models are simulations or representations of natural hydrologic systems. Through the use of conceptual, physical, or numerical hydrologic flow models hydrologists may predict or forecast flooding events, better understand how to manage water resources, and test hypotheses about unknown flow conditions. With the advances in computer technology, sophisticated numerical hydrologic flow models can be run on modern desktop computers. The most common hydrologic models use numerical methods such as finite difference and finite element techniques where discretization enables the solution of partial differential equations that accurately model natural flow conditions. Hydrologic models for groundwater flow have been standardized by the government for regulatory use and have been adapted by hydrologists and software providers. Examples of the most common hydrologic flow model applications are: snowmelt, infiltration, interception, evapotranspiration, groundwater flow, open‐channel flow, and runoff.
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