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Open-File Report 2007–1088

A Monthly Water-Balance Model Driven By a Graphical User Interface

By Gregory J. McCabe and Steven L. Markstrom

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This report describes a monthly water-balance model driven by a graphical user interface, referred to as the Thornthwaite monthly water-balance program. Computations of monthly water-balance components of the hydrologic cycle are made for a specified location. The program can be used as a research tool, an assessment tool, and a tool for classroom instruction.




The Water-Balance Mode

Snow Accumulation

Direct Runoff

Snow Melt

Evapotranspiration and Soil-Moisture Storage

Runoff Generation

Running the Water-Balance Program

Input Parameters

Data Files


References Cited


Suggested citation:

McCabe, G.J., and Markstrom, S.L., 2007, A monthly water-balance model driven by a graphical user interface: U.S. Geological Survey Open-File report 2007-1088, 6 p.

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