Hello Rich, For the infiltration, if you can determine the soil texture, then you could estimate the Green-Ampt parameters using [1] What do you want to do in that area? Perform hydrological/overland flow analysis? If it is the case, you might give Itzï a try: https://www.itzi.org/ Some of the parameters could be estimated (like friction coefficient).
Regards, Laurent [1] Rawls, W., Brakensiek, D., and Miller, N. (1983). "Green‐ampt Infiltration Parameters from Soils Data." J. Hydraul. Eng., 10.1061/(ASCE)0733-9429(1983)109:1(62), 62-70. 2016-09-22 13:09 GMT-05:00 Rich Shepard <rshep...@appl-ecosys.com>: > The project area -- in farmland -- is small (< 20 ha) and essentially > flat with elevation differences less than 1 meter. The LiDAR raster cells > (imported from ARC Grid format) have a cell size of 3x3 international feet; > elevation resolution is 0.013 feet. > > While r.slope.aspect generates an aspect map, the slope map is blank. The > maps for dx, dy, and relief display variations. > > While I have some soil data, it's sparse and I haven't (yet) found > infiltration rates; the rainfall data is very low and from a station several > miles away. I probably do not have all required input data for r.sim.water > or r.watershed. > > Based on your much more extensive experiences applying GRASS to limited > areas please suggest approaches that might be appropriate for this project. > It might be that all I can do is create detailed contour maps of the area > and describe the situation qualitatively without robust quantitative > analyses. > > TIA, > > Rich > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user