Reference overlay highlighting water features for use with layers related to the natural sciences.

World Hydro Reference

Each entry represents a geographic location where conflicts over water have occurred from 3000 BC to 2019 and information about each conflict. Events are categorized based on the use, impact, or effect that water had within the conflict.

Trigger: Water as a trigger or root cause of conflict, where there is a dispute over the control of water or water systems or where economic or physical access to water, or scarcity of water, triggers violence.

Weapon: Water as a weapon of conflict, where water resources, or water systems themselves, are used as a tool or weapon in a violent conflict.

Casualty: Water resources or water systems as a casualty of conflict, where water resources, or water systems, are intentional or incidental casualties or targets of violence.

Water Conflicts (3000 BC - present)

Each entry represents a geographic location where conflicts over water have occurred from 3000 BC to 2019 and information about each conflict. Events are categorized based on the use, impact, or effect that water had within the conflict. 

Trigger: Water as a trigger or root cause of conflict, where there is a dispute over the control of water or water systems or where economic or physical access to water, or scarcity of water, triggers violence.

Weapon: Water as a weapon of conflict, where water resources, or water systems themselves, are used as a tool or weapon in a violent conflict.

Casualty: Water resources or water systems as a casualty of conflict, where water resources, or water systems, are intentional or incidental casualties or targets of violence.

Locations Where Water Triggered Conflict (3000 BC - 2019)

The projected change in dry spells in 2051-2080, relative to 1971-2000, under a higher emissions scenario (RCP 8.5). Dry spells represent the annual average count of 5-day periods without precipitation.

World Hydro Reference

Water Conflicts (3000 BC - present)

1971-2000 to 2051-2080 Difference in Dry Spells, RCP 8.5 (# of 5-Day Periods Change)

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