HYDROLOGY

Hydrology:

Hydrology is the study of science of water which deals with the occurens circulation and distribution of water on earth surface and it's atmosphere.

Hydrological Cycle:

This is a cycle in which water moves from one phase to another phase. 

Residence Time:

This is the time taken by a water particle in crossing one particular phase of hydrological cycle. 

Catchment Area:

The area draining into a river or stream is called the catchment area for that particular stream or river. Catchment area is also called as water shed.

Water Budget Equation:

This equation is based on the law of conservation of mass and according to it, 

Mass Inflow- Mass Outflow = Change in storage

Precipitation:

It denotes all forms of water or moisture that reaches the earth surface. 

Rain:

This is the principal mode of precipitation in India. This denotes water droplets of size raining from 0.5mm to 6mm.

      0-2.5 mm/hr (light rain) 

      2.5-7.5 mm/hr (moderate) 

     >7.5 mm/hr (heavy rain )

Snow:

These are the ice crystals having a density of 0.1 gm/cc.

Drizzle:

These are fine droplets of water whose size is less than 0.5 mm and intensity is less than 1 mm/hr.

Glaze:

When droplets of water comes into contact with cold ground then water droplet is converted into ice.