Option A terms and definitions

Option A terms and definitions

Term                                              Definition

Drainage basin                                The area drained by a river and its tributaries.

Drainage divide                               Also known as a watershed, it is the line defining the boundary                                                         of a river or stream drainage basin separating it from adjacent                                                           basin(s).

Maximum sustainable                     The maximum level of extraction of water that can be maintained

yield                                              indefinitely for a given area.

Wetlands                                        Areas that are regularly saturated by surface water or                                                                        groundwater, including freshwater marshes, swamps and bogs.

Source: Diploma Programme Geography Guide.