Creating Small Streams and Waterfalls
Railroad Model Craftsman 1995-04
Scenery - Waterside
The author used foam blocks to build up the scene, etched the foam to simulate the erosion of the water of the waterfall, then poured thick plaster to represent the water, painted the water, and finally installed the surround scenery and the waterfall itself.
Modeling Stone Walls
Model Railroader 2003-02
Creating and casting a stone wall for houses or retaining walls. Explains how to do curved walls.