Drainage system may refer to:

• Drainage system (geomorphology), patterns formed by streams, rivers, and lakes in a drainage basin
• Drainage system (agriculture), a system by which water is drained on or in the soil to enhance production
• Sustainable drainage system, designed to reduce the potential impact of development

Look up drainage system in Wiktionary, the free dictionary.

• Drainage
• Storm drain
• Tile drainage
• Watertable control

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