This five-article series by Jack Verducci discusses everything you need to know about designing and/or building a water feature in your garden railway.
Part 1: Tunnels and water feature design
Part 2: Design principles and waterfalls
Part 3: Constructing watercourses
Part 4: Pond pumps, liners, and filters
Part 5: Loose ends (such as skimmers and dry washes) (14 pages, 4.6 mg)