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Drainage basin
An area drained by a major river and its tributaries.
Glossary
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Drinking water source
Drinking water source provides information about access to improved or unimproved drinking water sources available to segments of a country’s population.
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Drip irrigation
Using small pipes that slowly drip water just above the ground to conserve water to use for crops.
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Drought
A long period without rain or with very minimal rainfall.
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Drought avoidance
Adaptations of desert plants and animals to evade dry conditions by migrating (animals) or being active only when wet conditions occur (plants and animals).
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Drought endurance
Adaptations of desert plants and animals to tolerate dry conditions through water storage and heat loss mechanisms.
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Dry farming
Planting and harvesting according to the seasonal rainfall cycle.