section_path: Geography and climate/Topography
section_name: Topography
paragraph_text: Topography
  
  Basel has an area, as of 2009, of 23.91 square kilometers (9.23 sq mi). Of this area, 0.95 km 2 (0.37 sq mi) or 4.0% is used for agricultural purposes, while 0.88 km 2 (0.34 sq mi) or 3.7% is forested. Of the rest of the land, 20.67 km 2 (7.98 sq mi) or 86.4% is settled (buildings or roads), 1.45 km 2 (0.56 sq mi) or 6.1% is either rivers or lakes.
  
  Of the built up area, industrial buildings made up 10.2% of the total area while housing and buildings made up 40.7% and transportation infrastructure made up 24.0%. Power and water infrastructure as well as other special developed areas made up 2.7% of the area while parks, green belts and sports fields made up 8.9%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 2.5% is used for growing crops and 1.3% is pastures. All the water in the municipality is flowing water.