User requirements

For the application and evaluation of the results from MONERIS, the user should have a broad knowledge of physical, chemical and biological processes in river systems. In addition, comprehensive knowledge of Microsoft EXCEL and Microsoft ACCESS software is required. The user should also be able to evaluate the input data for eligibility and reliability.

The reliability of the model results depend upon the quality of the input data, the processing for MONERIS, and on the modellers knowledge. Every application requires careful consideration of the expectations of the model results in relation to the input data, particularly the determination of whether the special features of the modelled river system are considers in an adequate way.

The most up to date version of MONERIS 3.0 can be modified with the help of .Net Framework therefore within the MONERIS software core modules for new calculations approaches are implemented.

System requirements

Software MONERIS 3.0
  • System software: Microsoft Windows XP or Windows 7
  • Microsoft .NET Framework 2.0

MONERIS Import tool
  • ArcGIS Desktop 9.3 Service Pack 1 whit .Net Support
  • ArcGIS 9.3.1 (also supported), Spatial Analyst extension

  • 3 GB RAM memory (4 GB or more is recommended)
  • about 100 MB free hard disk (without data)
  • display resolution of 1024 x 768

Input data requirements

A detailed description of the input data requirements is given in the MONERIS Manual.

Since MONERIS can compute data for small river basins (e.g. river Stör in Northern Germany, catchment size 1,135 km²) and large river basins (e.g. Danube river basin, catchment size 800,000 km²), the amount of effort needed for the data searches depends on the chosen scale, the data requirements, and the desired resolution.

With the support of an external Geographic Information System (GIS), the data have to be managed, processed and transferred into a uniform projection. Data can be in different forms, for example data for waste water treatments plants (WWTP) can be in inventory form with accurate geo-referenced locations for each individual WWTP, or in the form of generalized statistical data on an administrative level.

The following input data are required for the application of MONERIS:

Spatial input data
Catchment boundaries
Digital elevation model
River network
Location of tile drainages
Population density
Land use (according to MONERIS classification)   
Soil loss maps
Atmospheric deposition

Data for administrative units (derived from statistics)
Nitrogen surplus of the soil nutrient balance
Phosphorus accumulation in the soil
Agriculture Length of sewer system network
Waste water treatment plants, particularly waste water statistics
Proportion of the population connected to sewer systems and/or WWTPs
Share of tile drainages, if not available as spatial data


Data for geo-referred issues
Inventory of waste water treatment plants
Data from water quality measuring points
Data from water discharge measuring points
Data from precipitation measuring points