Rivers

The longest river in Africa and the water source on which Egypt depends almost entirely. It is the defining case of transboundary water dependence: Egypt receives essentially all its water…

The principal river of southern England and the source of much of London’s water supply. Its recovery from being declared biologically dead in the 1950s is one of the best-documented river…

The river of the American south west, and the clearest example anywhere of a river allocated beyond its actual flow. In most years it no longer reaches the sea.

By far the largest river in the world by discharge, delivering roughly a fifth of all river water reaching the oceans.

Supports one of the densest populations of any river basin on Earth, and carries a correspondingly severe pollution load alongside profound religious significance.

The longest river in Asia and the site of the Three Gorges Dam, the largest power station in the world by installed capacity.

Supports the largest contiguous irrigation system in the world, and is governed by the Indus Waters Treaty — the most durable transboundary water agreement in existence, having survived se…

Australia’s principal river system and the subject of the most ambitious water reallocation programme attempted anywhere — the Basin Plan, which buys back water entitlements to restore env…

The most important navigable river in Europe and the site of the 1986 Sandoz chemical spill, the disaster that triggered modern European transboundary water cooperation.

Supports one of the world’s most productive inland fisheries. Upstream dam construction has altered its flood pulse, the seasonal rhythm on which that fishery and the Tonlé Sap lake system…

The most international river basin in the world, shared by nineteen countries, and the subject of the longest-running basin-scale cooperation programme in Europe.

The longest river in Great Britain, rising in the Cambrian Mountains and flowing to the Bristol Channel through one of the largest tidal ranges in the world.