Has anyone heard of the hydromad package?
http://hydromad.catchment.org/

"*hydromad* is an R package (i.e. a software package for the R statistical
computing environment <http://www.r-project.org/>). It provides a modelling
framework for environmental hydrology: water balance accounting and flow
routing in spatially aggregated catchments. It supports simulation,
estimation, assessment and visualisation of flow response to time series of
rainfall and other drivers."

2011/9/30 <francesco.pirotti@unipd.it>

> >From my experience, GRASS also has another module which does a very good
> job (at least from my limited experience) at calculating flow accumulation
> for each cell: r.watershed. Some time ago I successfully adapted the GRASS
> code to my own c++ code; I used GDAL raster library to read a raster DTM
> and used the r.watershed code to run the accumulation analysis on the
> matrix with height values.
> Cheers,
> Francesco Pirotti
> CIRGEO - University of Padova - Italy
>
> > I would be very interested in your work of getting flow accumulation
> > working in R.  I might be able to help (with my limited skills).
> >
> > Stephen
> >
> > On Thu 29 Sep 2011 01:50:10 PM CDT, Jonathan Greenberg wrote:
> >> Thanks for the responses -- one of the issues with the GRASS
> >> implementation of terraflow is that there is not, to my knowledge,
> >> parallel support for the code -- the C++ version, I suppose, we can
> >> try to compile, although it seems to be fairly out of date.  I figured
> >> with the quickly increasing capabilities in spatial programming beyond
> >> just spatial statistics in R (e.g. via raster, rgdal, maptools), as
> >> well as other people developing parallel interfaces for R (e.g.
> >> snowfall, Rmpi), R may do well as a scalable system for doing large
> >> scale image processing/GIS analyses.  Certainly, other programs have
> >> not scaled well (ArcMap and GRASS to name a few).
> >>
> >> topidx looked interesting but I can tell that it won't scale -- it
> >> requires the image be in memory as a matrix, so any reasonably large
> >> DEM won't work.
> >>
> >> Sounds like this may require some programming!
> >>
> >> --j
> >>
> >>
> >>
> >> On Thu, Sep 29, 2011 at 6:02 AM, Rich Shepard<rshepard@appl-ecosys.com>
> >> wrote:
> >>> On Wed, 28 Sep 2011, Jonathan Greenberg wrote:
> >>>
> >>>> I was wondering if anyone had implemented flow accumulation in R (e.g.
> >>>> http://www.cs.duke.edu/geo*/terraflow/)?
> >>>
> >>> Jon,
> >>>
> >>>   I use r.terraflow (and other hydrological modules) within GRASS
> >>> <http://grass.osgeo.org/>. Terrain and hydrologic modeling is best
> >>> done, in
> >>> my opinion, in GRASS and leave the spatial statistics to R. There is an
> >>> interface between the two that allows us users to take advantage of
> >>> both.
> >>>
> >>> Rich
> >>>
> >>> --
> >>> Richard B. Shepard, Ph.D.          |   Integrity - Credibility -
> >>> Innovation
> >>> Applied Ecosystem Services, Inc.   |    Helping Ensure Our Clients'
> >>> Futures
> >>> <http://www.appl-ecosys.com>       Voice: 503-667-4517      Fax:
> >>> 503-667-8863
> >>>
> >>
> >>
> >>
> >
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> >
> >
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