Hydrology - Set I

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Across
  1. 3. That branch of hydrology which pertains to surface streams, the science of rivers
  2. 4. Measures introduced to reduce the amount of water used for any purpose and/or to protect it from pollution
  3. 5. The drainage basin of a river is called its catchment area
  4. 6. A hole or shaft, usually vertical, excavated in the earth for bringing ground water to the earth
  5. 8. The wearing away of land by water, wind, ice or gravity
  6. 9. Body of land ice formed from recrystallised snow accumulated on the ground that may slowly flow over land
Down
  1. 1. A moving mass of debris, snow and ice sliding rapidly down a mountain slope
  2. 2. Water found underground in the cracks and spaces in soil, sand and rock
  3. 4. The science of ice in all its forms such as snow, ice and hail
  4. 7. The supply of water to help crops grow