Dam (agricultural reservoir)

A dam is a water reservoir in the ground, confined by a barrier, embankment or excavation, on a pastoral property or similar. The term is found widely in South [African English|South African], Australian and New [Zealand English|New Zealand] English, and several other English dialects, such as that of Yorkshire.
The term can be found in the old English folk song Three [Jolly Rogues]:
The expression "farm dam" has this meaning unambiguously, and where the barrier or embankment is intended, it may be referred to as the "dam wall".

Usage examples

Examples from Australia:
An example from New Zealand:
Examples from South Africa: