Water Harvesting in Arid Regions Quiz

Precipitation is generally lower than potential evaporation, non-uniform in distribution, resulting in frequent drought periods during the crop growing season, and usually comes in intense bursts, resulting in surface run-off and uncontrolled rill and gully erosion

As in the Mediterranean type of climate, precipitation is less than 300 mm, part of which is lost to evaporation and run-off

In dry (semi-arid) ______, such as the Sahel zone in Africa, although mean precipitation is relatively higher (500 mm), a larger portion of precipitation is lost to evaporation

The principle of ______ is based on the concept of depriving part of the land of its share of precipitation, which is usually small and non-productive, and giving it to another part to increase the amount of water available to the latter part, which originally was not sufficient, and to bring this amount closer to the crop water requirements so that an economical agricultural production can be achieved

Such concentration of precipitation in a smaller area is called ______ and may be defined in various ways such as: The process of collecting natural precipitation from prepared watersheds for beneficial use. Collecting and concentrating various forms of run-off from precipitation and for various purposes

What term describes the concentration of precipitation in a smaller area, resulting in surface run-off and uncontrolled erosion?

In the Sahel zone in Africa, although mean precipitation is relatively higher (500 mm), a larger portion of precipitation is lost to:

What is the main concept behind agricultural rainwater harvesting?

What is the amount of precipitation stored in the root zone in cool winter areas, such as in the Mediterranean type of climate?

What is the primary impact of non-uniform distribution of precipitation in arid and semi-arid regions?