MACRO 5.2

Description

MACRO is a one-dimensional, process oriented, dual-permeability model for water flow and reactive solute transport in soil. The soil pore space is divided into a micropore and a macropore domain characterized by different flow rates and solute concentrations. For the micropore domain water flow is governed by Richards’ equation and solute transport by the convection-dispersion equation.

For the macropore domain water flow is gravity driven and the solute transport assumed to be solely convective. The lateral exchange of water and solutes between pore domains is calculated using approximate, physically-based, first-order expressions. Additional model assumptions include first-order kinetics for degradation in each of four `pools' of pesticide in the soil (micro- and macropores, solid and liquid phases), together with instantaneous or kinetic sorption.

Examples of applications

• Simulations of water flow and pesticide leaching from tile drained agricultural fields.
• Estimations of contaminant concentrations in groundwater.
• Reactive and non-reactive solute transport in soil lysimeters.
• Exempel på tillämpningar för modellen

Download the model

• MACRO 5.2 (zip-file)
• Command line version of MACRO 5.2 (zip-file)

Download documents

• Technical description (pdf)
• Users guide (pdf) 
• Changes from earlier versions (pdf) 
• Frequently asked questions (pdf) 
• Recent references (pdf)

R-package Macroutils

Macroutils, an R package for batch reading, writing, plotting and converting MACRO binary files (R 3.2) To download please contact mats.larsbo@slu.se.

• Parameter definition file (v07)
• Macroutils users guide - contact Mats Larsbo (mats.larsbo@slu.se).
• Webpage for macroutils development versions (GitHub.com)