Geological Survey of India established
Network in 1969
Central Ground Water Board expanded
it under every five-year plan
Activities :
Site selection
for representative locations
Inventory and set-up
of observation marks
Regular replacements
of defunct wells
Construction of purpose
built piezometers
Optimisation of network
stations
Achievements :
Water level measurement is being
undertaken four times in a year.
Based on the water level data depth
to water level(Pre & Post monsoon),
fluctuation maps & long term
water level trend are being prepared.
An yearly year book on Hydrograph
Stations is available with the Deptt.
Total
number of NHNS :
Total No. of EW : 282
Total No. of EW : 28
Developed and Hosted by NIC. Ccntents
provided by the respective Department.
Best viewed in IE 5 or above and in 800x600 monitor resolution.
Backgrounds: 
Water level measurement is being
undertaken four times in a year.
Based on the water level data depth
to water level(Pre & Post monsoon),
fluctuation maps & long term
water level trend are being prepared.
An yearly year book on Hydrograph
Stations is available with the Deptt.
