% total quantity of water in the world that is salineis about

Humidity is measured by

Most accurate methodfor calculating average rainfall of a catchment areais

Above Q

Above q

Water year starts from

Formation through which only seepage is possible and yield is insignificant called as

A year is considered as a drought year when area affacted by moderate/serve drought is more than --- of total area of country

A 100 yr flood have -- flood frequency

One gallon is

One Nautical miles is

1Acre is

One mile is

As a scale increases, Area