Category Archives: Hydrology

Itzï

Itzï is a hydrologic and hydraulic model that simulates 2D surface flows on a regular grid using simplified shallow water equations. It uses GRASS GIS as a back-end for reading entry data and writing results. It simulates surface flows from direct rainfall … Continue reading

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NETPATH

An interactive program for calculating NET geochemical reactions and radiocarbon dating along a flow PATH Find NETPATH at: http://water.usgs.gov/software/netpath.html

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WATEQ4F

A program for calculating speciation of major, trace, and redox elements in natural waters Find WATEQ4F at: http://water.usgs.gov/software/wateq4f.html

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PHRQPITZ

Geochemical calculations in brines Find PHRQPITZ at: http://water.usgs.gov/software/phrqpitz.html

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PHREEQC

A program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations Find PHREEQC at: http://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/

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