Floods

Flooding is worsening with climate change and urban growth. Learn what causes floods, their impacts, and how to build resilience.

Water Cycle & Flooding Key Takeaways

Key Takeaways: 

  • The water cycle is imperative to understanding where flooding originates from and the natural cycle to which it belongs to. 
     
  • Runoff and poor infiltration are major contributors to flooding, especially in urban areas with impervious surfaces like concrete.
     
  • Intense or prolonged precipitation can overwhelm the ground’s natural capacity to absorb water, leading to surface flooding in low-lying areas or along riverbanks.
     
  • Urbanization and climate change exacerbate flooding risks by reducing natural water absorption and increasing runoff from hard surfaces.
     
  • Poor drainage, inadequate flood control, and excessive groundwater extraction leading to subsidence exacerbate flooding by creating water-trapping basins, damaging infrastructure, and increasing runoff.