This is the {{ River index}} or river index article template.
It can be used to mark a page as a set index article about rivers. A river index article lists multiple rivers, preferably with a description of their location and length.
This template is usually placed at the bottom of the page and adds the page to Category:Set index articles on rivers.
This template can be used without any parameters like this:
{{River index}}
Editors may want to control how the page is sorted in
Category:Set index articles on rivers.
This is accomplished by adding the
sort key as the "name=" parameter.
For example,
List of streams named Fish Creek is sorted using:
{{River index|name=Fish}}
or, in short:
{{River index|Fish}}