human actions disrupting

• deforestation

  • eg amazonia
  • flooding or drought
  • less infiltration
• land use change

  • ploughing breaks up sruface so more water can infiltrate
  • farming livestock, compacts soil, increase run off
  • urbanisation eg roads- impermeable layers
• water storage reservoirs

  • creating new storage reservoirs by building dams
  • vulnerable to evaporation