Slow/Rapid Sand sits under Filtration & Membranes in the Water Technologies section. This introduction sets out what the topic covers and what it leaves to neighbouring topics, so a reader can tell quickly whether they are in the right place.
What it covers
The terms an engineer or a planner meets first, the decisions the topic informs, and the evidence those decisions usually rest on.
Where to go next
The other entries under Filtration & Membranes take each part further, and the encyclopedia holds the definitions, parameters and standards they cite.