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Irrigation schemes in the world use about 3 500 km 3 water per year, of which 74% is evaporated by the crops. [7] This is some 80% of all water used by mankind (4 400 km 3 per year). The water used for irrigation is roughly 25% of the annually available water resources (14 000 km 3) and 9% of all annual river discharges in the hydrological cycle.
This is a list of countries by irrigated land area based on The World Factbook of the Central Intelligence Agency. [1] The two countries with the largest irrigated land area are India and China, which make up 22.06% and 21.33% of worldwide irrigated land area respectively as of 2020. Sorting is in alphabetical order.
Global map of countries by total renewable internal freshwater resources (billion cubic meters) in 2020, according to World Bank [1]. This is the list of countries by total renewable water resources for the year 2020, based on the latest data available in January 2024, by World Bank and Food and Agriculture Organization (AQUASTAT data). [2]
Pages in category "Irrigation by country" The following 14 pages are in this category, out of 14 total. ... Statistics; Cookie statement; Mobile view ...
Inf = Irr + Wel, where Irr = surface irrigation from the canal system, and Wel = the irrigation from wells; The field irrigation efficiency (Ff < 1) is: Ff = Era / Inf, where Era = the evapotranspiration of the crop (consumptive use) The value of Era is less than Inf, there is an excess of irrigation that percolates down to the subsoil (Per):
Irrigation (also referred to as watering of plants) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been developed by many cultures around the world.
The lower the irrigation efficiency, the higher the losses. Although reasonably high irrigation efficiencies of 70% or more (i.e., losses of 30% or less) can occur with sophisticated techniques like sprinkler irrigation and drip irrigation or by well-managed surface irrigation, in practice the losses are commonly in the order of 40% to 60% ...
World Atlas of Biodiversity. UNEP World Conservation Monitoring Centre [5] Energy. BP Statistical Review of World Energy [6] The International Energy Agency. Key World Energy Statistics [7] UN Energy Statistics Database [8] Fisheries. UN Food and Agriculture Organization [9] Forests. UN Food and Agriculture Organization [10] Fertilizer