Water Cycle sits under Hydrology in the Water Systems 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 Hydrology take each part further, and the encyclopedia holds the definitions, parameters and standards they cite.