APEX Model

APEX -- Agricultural Policy Environmental eXtender

The Agricultural Policy Environmental eXtender ecosystem: the process model, its GIS interface, and the analysis toolbox. Pick a project below to get started or find its documentation.

Core model

APEX

The process-based Fortran model simulating crop growth, hydrology, erosion, and nutrient cycling at field and small-watershed scale.

Repository Docs
GIS interface

QAPEX

The QGIS-based interface for building APEX projects from spatial data: delineation, HRU/subarea setup, inputs, and running the model.

Repository Docs
Coming soon

APEX Toolbox

A desktop toolbox for working with APEX projects: visualization, calibration, sensitivity analysis, and scenario comparison.

Coming soon