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posted on 2024-02-13, 13:39 authored by USDA Agricultural Research Service

Root Zone Water Quality Model 2 (RZWQM2) is a whole-system model for studying crop production and environmental quality under current and changing climate conditions. It emphasizes the effects of agricultural management practices on physical, chemical and biological processes. RZWQM2 is a one-dimensional model with a pseudo 2-dimensional drainage flow. Crop simulation options include the generic plant growth model, DSSAT-CSM 4.0 and HERMES SUCROS models. It also can simulate surface energy balance with components from the SHAW model and water erosion from the GLEAMS model. An automated parameter estimation algorithm (PEST) was added to RZWQM2 for objective model calibration and uncertainty analysis.

Resources in this dataset:




Data contact name

Derner, Justin

Data contact email


United States Department of Agriculture


  • Not specified

ISO Topic Category

  • environment
  • farming

National Agricultural Library Thesaurus terms

Root Zone Water Quality Model; crop production; climate change; drainage; growth models; energy balance; water erosion; GLEAMS model; algorithms; uncertainty analysis; rangelands; Colorado; watersheds; Nematoda; Georgia; crops; soil profiles; nutrients; pesticides; rhizosphere; irrigation; tile drainage; weather; best management practices; environmental sustainability; probability distribution; temperature; wind; relative humidity; carbon dioxide; water quality; environmental impact; crop rotation; planting date; nitrates; runoff; pollution load; groundwater; pollutants; rain; micropores; macropores; heat flow; water table; evaporation; transpiration; soil water; melting; climatic factors; carbon; mortality; root growth; soil pH; soil solution; nitrogen; humus; crop residues; ammonium; mineralization; nitrification; denitrification; volatilization; adsorption; organic matter; bulk density; surface roughness; soil density; fertilizers; irrigation scheduling; furrows; water content; corn; wheat; potatoes; databases; statistics; computer software; crop models

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

Primary article PubAg Handle

Pending citation

  • No

Public Access Level

  • Public

Preferred dataset citation

USDA Agricultural Research Service (2019). RZWQM2. United States Department of Agriculture.