I have QGIS and GRASS installed . Basically i need this program for making maps something like this: https://www.youtube.com/watch?v=5HuPX7JS7ZA
I downloaded DEM from http://glcfapp.glcf.umd.edu:8080/esdi/ for area i want to map and i apply it on google maps. I used GRASS until i couldn't figure out how to put colours for my heights and rivers. Problem with colors i solved using Terrain analysis but still dont know how to put rivers. (I didnt get how any of tools here work - http://grasswiki.osgeo.org/wiki/Hydrological_Sciences guess too complicated for me)
do you know any step by step simple guide for putting rivers in map, or even better video description ? Links where i can find vector data for very detailed hydrological network that i can overlay on DEM would help a lot?