Irrigated land:
9,000 sq km (2003)
Total renewable water resources:
2,132 cu km (2000)
Freshwater withdrawal (domestic/industrial/agricultural):
total: 10.71 cu km/yr (50%/4%/46%)
per capita: 235 cu m/yr (2000)
Natural hazards:
highlands subject to volcanic eruptions; occasional earthquakes; periodic droughts
volcanism: Galeras (elev. 4,276 m, 14,029 ft) is one of Colombia's most active volcanoes, having erupted in 2009 and 2010 causing major evacuations; it has been deemed a "Decade Volcano" by the International Association of Volcanology and Chemistry of the Earth's Interior, worthy of study due to its explosive history and close proximity to human populations; Nevado del Ruiz (elev. 5,321 m, 17,453 ft), 129 km (80 mi) west of Bogota, erupted in 1985 producing lahars that killed 23,000 people; the volcano last erupted in 1991; additionally, after 500 years of dormancy, Nevado del Huila reawakened in 2007 and has experienced frequent eruptions since then; other historically active volcanoes include Cumbal, Dona Juana, Nevado del Tolima, and Purace