The paper describes a method of a determining watersheds by coloring a DEM using a map of divergence of flow directions. The rendering process is not complicated and the only unusually thing being used to determine coloring. The image resulting form this is then manually segmented into basins. task that the coloring makes fairly trivial. The only prospective research is developing an algorithm that automates the last part and comparing it to existing basin delineation programs. This is not a Visualization problem.