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Preprocessor for the Natural Capital Project's RIOS software package

Project description


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Visit the home of RIOS on the web at


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Looking for a place to ask questions about RIOS? Check out the Natural Capital Project forums!


rios_preprocessor is meant as a replacement for the ArcGIS python code that currently produces the inputs for the main RIOS program.

rios_preprocessor produces rasters of:

  • Downslope retention index
  • Upslope source
  • Riparian index
  • Slope index

that are used as input for the following RIOS objectives:

  • Erosion Control
  • Nitrogen Retention
  • Phosphorus
  • Flood Mitigation
  • Groundwater Recharge/Baseflow

Along the way, there are some additional tricks rios_preprocessor uses that may be useful in other contexts:

  • rasterizes an input shapefile river network and matches it to a (raster) DEM/DTM
  • identifies discontinuous river banks along a rasterized river
  • identifies the end points of rasterized rivers


  • numpy
  • pandas
  • geopandas
  • fiona
  • rasterio > 0.36
  • shapely
  • pygeoprocessing ~= 0.3.3


pip install rios_preprocessor


Version 0.2.0

  • Refactored and modularised code for increased usability
  • Raster projection checks added
  • Set deprecation warning for get_objectives_list
  • Minor bug fixes

Version 0.1.9

  • Fixed upslope source and riparian index getting affected by integer bug

Version 0.1.8

  • Deprecated GDAL style transforms in line with rasterio > 0.36
  • Set upper limit on pygeoprocessing to retain flow algorithms
  • Minor bug fixes

Version 0.1.7

  • Minor bug fixes

Version 0.1.6

  • Implemented logging
  • PEP8 fixes

Version 0.1.5

  • Python 3 style print statement fixing
  • Cleaned up documentation

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