At a glance
The land area that drains water toward a common outlet, such as a river, reservoir or lake.
Why it matters
Conditions upstream can affect downstream availability, sediment and flood exposure.
An operating example
Review rainfall and land-cover changes across the catchment serving a reservoir.
Illustrative application, not a live customer result or a guarantee of product availability.
What it does and does not tell you
A catchment boundary alone does not model flow, water rights or available storage.