Irrigated Land

Total irrigated land area in square kilometers sourced from CIA World Factbook 2020. Based on FAO Aquastat database and national agricultural surveys. Includes land equipped for irrigation from surface water (rivers, reservoirs), groundwater (wells, tube wells), and unconventional sources (treated wastewater). Data year typically noted (e.g., "2012 est.").

Irrigation infrastructure is critical for agricultural productivity, especially in arid and semi-arid regions. It enables crop cultivation beyond rainy seasons, increases yields, and reduces vulnerability to droughts. However, irrigation also depletes water resources, risks soil salinization, and requires significant energy inputs. The ratio of irrigated to arable land indicates agricultural intensification and water management capacity.

Irrigated Land Interpretation: Top Irrigated Countries (Absolute Area): 1. India: ~667,000 sq km (largest - supports 1.4B population) 2. China: ~690,000 sq km (intensive rice cultivation) 3. United States: ~264,000 sq km (commercial agriculture) 4. Pakistan: ~202,000 sq km (Indus River system) 5. Iran: ~95,000 sq km (arid climate dependency) Irrigated Land as % of Arable Land (indicator of water management): - Very High (>80%): Egypt 100% (Nile dependency), Turkmenistan 100%, Uzbekistan 86% - High (50-80%): Pakistan 82%, Tajikistan 70%, Peru 54% - Moderate (20-50%): India 35%, China 41%, Mexico 23% - Low (<20%): Most sub-Saharan Africa (rain-fed agriculture), Brazil 5% Implications by Climate: - Arid regions: Irrigation essential for any agriculture (Middle East, Central Asia) - Semi-arid: Irrigation supplements rainy season (India, Pakistan) - Humid tropics: Low irrigation need (Brazil, Indonesia) - rain-fed works - Temperate: Moderate irrigation for intensification (US, Europe) Water Source Challenges: - Groundwater depletion: India, Pakistan (unsustainable extraction) - River dependency: Egypt (Nile), Iraq (Tigris-Euphrates) - Glacier melt: Central Asia (climate change threat) - Wastewater reuse: Israel (innovative but limited) Sustainability Concerns: - Rapid irrigation expansion: Drains aquifers (India, China) - Salinization: Poor drainage leads to salt buildup (Australia, Pakistan) - Energy intensity: Pumping groundwater requires electricity (subsidized in many countries) No/Low Irrigation: - Rain-fed agriculture dominance: Sub-Saharan Africa, parts of South America - Implication: High vulnerability to drought, climate variability

Coverage: ~200 countries (not all countries report) Update frequency: Static (CIA Factbook 2020, data typically 2010-2015) Source: CIA World Factbook via FAO Aquastat Limitations: Data year varies by country (check embedded year - some data from 2012). Does not indicate functionality (some infrastructure non-operational). Does not measure irrigation efficiency (flood vs drip irrigation). Groundwater vs surface water breakdown not provided. Does not track water sustainability or depletion rates.