TYPES OF DATA AVAILABLE IN DATA CENTRE

1. Rainfall Data – Yearly, Monthly, Daily, Hourly
2. Meteorological Data
1. Maximum, Minimum temperature - Daily
2. Temperatures -Hourly
3. Relative Humidity
4. Sunshine hours- Hourly
5. Wind direction
6. Wind velocity ok
7. wait
8. Evaporation
9. Soil moisture content
10. Atmospheric pressure
11. Evapo Transpiration
3. Hydrologic Data (Discharge at various points of the river) –

                      Gauge & Discharge at Selected sites throughout Tamilnadu

4. Ground Water Level data
1. Water level of Shallow Aquifers
2. Water Level of Deep Aquifers
5. Water Quality for GW & SW
6. Geological Data- Lithologs
7. Sea water Intrusion data
8. Well Census Data – Database of 37 lakh wells throughout Tamilnadu as on 2004

Different Instruments used for SW Data Measurement

Standard Rain Gauges (SRG)

Autographic Rain Gauges(ARG)

Fully Climatic Stations(FCS)

•         Thermometers- Dry, Wet, Maximum, Minimum

•         Thermograph

•         Hygrograph

•         Sunshine Recorder

•         Wind vane

•         Anemometer

•         Pan Evaporimeter

•         Soil Moisture Content       Optional in FCS

•         Barometer

Automatic Weather Station(AWS)

Digital Water Level Recorder(DWLR)

Instruments for Flow Measurement

•            Current meter  

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