This repository includes code for implementing the centroid model from https://www.hydrol-earth-syst-sci-discuss.net/hess-2019-415/ in R. It can be used to interpolate several years of (annual) runoff simultaneously with r-inla (www.r-inla.org). Missing data (NA's) are predicted. We also get an estimate of the long-term average runoff. For annual data this is the mean annual runoff. centroidModel.R : A user friendly implementation of the centroid model. runoffdata.txt : Test data. Annual runoff data from Norway from 1996-2005 from 180 fully gauged catchments [mm/year]. The data are provided by NVE (www.nve.no, www.senorge.no). centroids.txt : The catchment centroids of the catchments in runoffdata.txt in utm coordinates [m]. observations.pdf : A visualization of the data in runoffdata.txt.

The project is funded by The Research Council of Norway. Grant number: 250362.