1. N. K. Manglik Director

2.  Hydro-meteorological observations could be broadly defined as the scientific way for collection of flow data at a specific location along the river including selected meteorological parameters  The reliability of the data is an important attribute for assessing the water resources in terms of quantity, quality and distribution in time and space.

3. Assessment of basin wise water availability and management Planning and design of water resources projects Study of climate change Flood forecast Flood mitigation Formulating National Water Policy

4. Reservoir inflow forecasting Water quality assessment Sediment assessment Morphological studies Assessment of navigational potential for inland waterways Resolving inter-state or international water disputes

5.  Study of the effect of nature and human interference  On surface water availability and its distribution  Research purposes  Estimation of periodical flow distribution during various seasons  Other purpose

6.  Water Level (Gauge)  Discharge or Flow  Water Quality  Silt  Selected Meteorological parameters including snow observations

7. Hydrological network optimization is a slow and evolutionary process, starting with a minimum number of stations, and increasing gradually (as necessary) until an optimum network is attained. An optimum network is achieved when the amount and quality of data collected and information processed is economically justifiable and it meets the users’ needs

8. Hydro-meteorological observation network in a basin depends on:  Purpose or objective  Terrain or Physiographic region in the basin

9. SN SN Physio- graphic Region Minimum density (area in km 2 per station) Precipitation Station Evaporation Station Stream flow Station Sediment discharge and sedimentation Water Temperature (Water Quality Station) Non – recording Recording 1.Coastal900 9,000 50,000 2,750 18,30055,000 2.Mountainous250 2,500 50,000 1,000 6,70020,000 3. Interior Plains 575 5,750 50,000 1,875 12,50037,500 4. Hilly/ Undulating 575 5,750 50,000 1,875 12,50047,500 5.Small islands25 2520 50,000 300 2,0006,000 6.Polar/arid10,000 100,000 20,00 0 200,000 Minimum hydro-meteorological stations WMO Guidelines

10.  Primary stations  Key gauging stations, Principal stations  Maintained on long term basis to generate representative flow series  Secondary stations  Short duration stations  Period enough to establish the flow characteristics of the river or stream.  Special purpose stations  Specific purpose stations or project stations or temporary stations  Discontinued when the purpose is served.  Fulfillment of legal agreement between co-basin states.  The primary as well as the secondary stations also many a times serve as special purpose stations.

11. Hydro-Meteorological Station of CWC (878)

16. Sensors No of sites MCO NTBO UGBO LGBO IBO KGBO BBBO MERO YBO TOTAL A-type- Rainfall3167418139930 B-type -Rainfall & River Water Level 1403824486205945127 C-Type -Rainfall & Reservoir Water Level 178--2-6 D-type -Rainfall, Water Level, Temperature, Humidity, Evaporation, Wind Speed, Wind Direction, Solar Radiation 32-2965 TOTAL47645384104357960445 EXISTING TELEMETRY

17. S. N. StateGGDGDQGDSGDSQGQ Grand Total 1Andhra Pradesh621006125 2Arunachal Pradesh124220424 3Assam28273161773 4Bihar3444114057 5Chhattisgarh881015032 6D.& NH4000004 7Delhi0110103 8Goa 0200002 9Gujarat208509042 10Haryana1300105 11Himachal Pradesh54212014 12Jammu & Kashmir34314015 13Jharkhand811306129

18. S. N.State GGDGDQGDSGDSQGQ Grand Total 14Karnataka8418015045 15Kerala003018021 16Madhya Pradesh81410018050 17Maharashtra 22215218169 18Manipur1000001 19Meghalaya1051007 20Mizoram 2203007 21Odisha2980016053 22Pondicherry 0030003 23Rajasthan59307024 Sikkim62070015 25Tamilnadu0020015035 26Tripura44050013

19. S. NoState GGDGDQGDSGDSQGQ Grand Total 27Telengana134305025 28Uttar Pradesh361013032293 29Uttrakhand1210354034 30West Bengal 19136218058 Grand Total 2951541313323926878

20. S. NName of BasinGGDGDQGDSGDSQGQ Grand Total 1.Brahmani-Baitarni Basin 61008015 2.Cauvery Basin 0019015034 3. East Flowing Rivers between Mahanadi and Pennar 72004013 4. East Flowing Rivers between Pennar and Kanyakumari 001205017 5. Ganga/Brahmaputra/Meghna/ Barak Basin 16481492910124445 6.Godavari Basin 25262122177 7.Indus Basin 78326026 8.Krishna Basin 161310013153 9.Mahanadi Basin 1831017039 10.Mahi Basin 62103012

21. SnName of BasinGGDGDQGDSGDSQGQG. Total 11.Narmada Basin 807011026 12.Pennar Basin 0060208 13.Sabarmati Basin 73201013 14.Subernarekha Basin 52104012 15.Tapi Basin 121113018 16.WFR from Tapi to Tadri 87403022 17. WFR from Tadri to Kanyakumari 0011018029 18.WFR of Kutchh & Saurashtra45203014 19. Area of Inland Drainage in Rajasthan Desert 0000000 20. Minor Rivers draining Myanmar (Burma) and Bangladesh 2003005 Grand Total2951541313323926878

22. Meteorological Station of CWC

25. S. No TotalRfRf(T)MtHuSsPeWvSgArGwlFcsFF 1.Brahmani - Baitarni Basin 1513014000000010 2.Cauvery Basin 322302971102606030 3.East Flowing Rivers between Mahanadi and Pennar 13 012000000000 4.East Flowing Rivers between Pennar to Kanyakumari 17120150021300023 5.Ganga-Brahamaputra-Meghna/Barak 385334821590923133324 6.Godavari Basin 68583924000008020

26. S. No TotalRfRf(T)MtHuSsPeWvSgArGwlFcsFF 7.Indus Basin 151306400360000 8.Krishna Basin 3829238004609030 9.Mahanadi Basin 3938031001100010 10.Mahi Basin 13402111100000 11.Narmada Basin 24 01614091500000 12.Pennar Basin 8808301701000

27. S. No TotalRf Rf (T) MtHuSsPe WvWv SgArGwlFcsFF 13.Sabarmati Basin 13706000000000 14.Subarnarekha & Burhabalang Basin 12 011000000000 15.Tapi Basin 17 00000000020 16.West Flowing Rivers from Tadri to Kanyakumari 29150270042500020 17.West Flowing Rivers from Tapi to Tadri 14 00000001000 18.West Flowing Rivers of Kutchh & Saurashtra 144011000700000

28. S. No TotalRf Rf (T) MtHuSsPeWvSgArGwlFcsFF 19.Minor Rivers draining in to Myanmar (Burma) and Bangladesh 0000000000000 20.Area of Inland Drainage in Rajasthan Desert 0000000000000 Grand Total 77665270439382411299573187

29. S.No.TotalRfRf(T)MtHuSsPeWvSgArFcsFF 1.Andhra Pradesh 4437201430190703 2.Arunachal Pradesh 17135530321001 3.Assam 635632020260421 4.Bihar 484002600000010 5.Chhattisgarh 222981700110101 6.Dadra & Nagar Haveli 330000000000 7.Delhi 330200020000 8.Goa 110000000000

30. S.No.TotalRfRftMtHuSsPeWvSgArFcsFF 9.Gujarat 412601611160001 10.Haryana 550300000000 11.Himachal Pradesh 970640002000 12.J&K 990300034000 13.Jharkhand 23210800000000 14.Karnataka 3732112500131801100 15.Kerala 219020000 0001 16.Madhya Pradesh 48460391409160400

31. S.No. No. of Met. Stations RfRf(T)MtHuSsPeWvSgArFcsFF 17.Maharashtra 544418 00000503 18.Manipur 110000000000 19.Meghalaya 660600100000 20.Mizoram 770400110000 21.Orissa 535154200000001 22.Pondicherry 310320030000 23.Rajasthan 241801900030000 24.Sikkim 11 0000002000

32. S.No.TotalRfRf(T)MtHuSsPeWvSgArFcsFF 25.Tamilnadu 3524029517270106 26.Tripura 12 0900000000 27.Uttar Pradesh 84 053000001600 28.Uttarakhand 302601940200000 29West Bengal 5430033000120800 Grand Total 7766527043938241129957318

34. S. No. Total RfRf(T)MtHuSsPeWvSgArGwlFcsFF 1Brahmani - Baitarni Basin 1100000000000 2 Ganga-Brahamaputra-Meghna/Barak 2411 660118000 3Godavari Basin 312000000000 4Indus Basin 222102200019600 5Krishna Basin 909000000000

35. S. No. TotalRfRf(T)MtHuSsPeWvSgArFcsFF 6Mahanadi Basin 550100010000 7Mahi Basin 000000000000 8 Narmada Basin 220110000000 9Tapi Basin 770000000000 10West Flowing Rivers from Tadri to Kanyakumari 330000000000 G. Total 7651010901227600

37. S. No. TotalRfRf(T)MtHuSsPeWvSgArFcsFF 1.Andhra Pradesh 404000000000 2.Arunachal Pradesh 808000000000 3. Assam 303000000000 4. Bihar 000000000000 5.Chhattisgarh 330000000000

38. SnTotalRfRf(T)MtHuSsPeWvSgArFcsFF 6.Dadra & Nagar Haveli 000000000000 7. Delhi 000000000000 8.Gujarat 110000000000 9.Himachal Pradesh 750550117200 10.Jammu & Kashmir 18 00000015400 11.Karnataka 550000000000 12.Madhya Pradesh 220110000000

39. S. No. TotalRfRf(T)MtHuSsPeWvSgArFcsFF 13.Maharashtra 12102000000000 14.Orissa 330000110000 15.Uttarakhand 1090330005000 G. Total 7651010901227600

40. Proposed Hydro-Meteorological Station (1917)

41. Proposed Hydro-Meteorological Station (800) in 12 th Plan

43. StatesFCSGGDGDQGDSGDSQ SG & MGrand Total Andhra Pradesh625435 Arunachal Pradesh12722 35 Assam2122649 Bihar391411863 Chhattisgarh64313 Delhi11 Gujarat325 Haryana718 Himachal Pradesh23331526 Jammu & Kashmir16562433 Jharkhand5117 Karnataka322429 Kerala16218 Lakshadweep11

44. StatesGGDGDQGDSGDSQ SG & MGrand Total Madhya Pradesh36511694 Maharashtra21251552 Meghalaya910322 Mizoram965323 Nagaland11 Odisha2821242 Rajasthan118221 Sikkim3264924 Tamil Nadu21324 Tripura112 Uttar Pradesh32451592 Uttarakhand181633747 West Bengal11171433 Grand Total2823434309347800

45. ORG.FCSGGDGDQGDSGDSQSG & MG. Total BBBO 5349 101112135 CSRO1 65 9 75 IBO 188 92 55 KGBO 1031 3 44 LGBO 53292112 97 MCO 20102 8 40 MERO 39 16 55 NBO 1232 1 45 NTBO 1015 25 TBO 32 74925 UGBO 5345 3117119 YBO 1157 16185 Grand Total12823434309347800

47. SNStateNo. of proposed H.O. Stations 1 Andaman and Nicobar5 2 Andhra Pradesh81 3 Telangana29 4 Arunachal Pradesh57 5 Assam125 6 Bihar124 7 Chhattisgarh53 8 Delhi2 9 Gujarat4 10 Haryana26 11 Himachal Pradesh39 12 Jammu and Kashmir50 13 Jharkhand34 14 Karnataka93 State wise- Proposed Hydrological Observation Stations (1917)

48. SNStateNo. of proposed H.O. Stations 15 Kerala26 16 Madhya Pradesh253 17 Maharashtra154 18 Manipur24 19 Meghalaya15 20 Mizoram38 21 Nagaland15 22 Orissa71 23 Rajasthan70 24 Sikkim18 25 Tamil Nadu84 26 Tripura6 27 Uttar Pradesh284 28 Uttarakhand71 29 West Bengal66 Total1917 State wise- Proposed Hydrological Observation Stations (1917)

49. Basin/OrganizationNo. of proposed H.O. Stations Brahamputra and Barak Basin297 Cavery and Southern River 203 Indus Basin 98 Krishna and Godavari Basin 156 Lower Ganga Basin 179 Monitoring ( C) 95 Mahanadi and Eastern River 132 Narmada Basin 55 Narmada and Tapi Basin 55 Teesta Basin 17 Upper Ganga Basin 317 Yamuna Basin 313 Grand Total1917 Basin Wise Summary of Proposed Hydrological Stations (1917) )

52. Symbol used for Stations RfRainfall Rf (T)Rainfall Telemetry station MtMax/Min Temperature or Air Temperature HuHumidity SsSunshine PePan-evaporation WvWind Speed and Wind Direction SgSnow Gauge ArAutomatic Raingauge/SRRG FcsFull Climatic Station/Automatic Weather Station HOHydrological Observation Station FFFlood Forecasting Station HOIWHydrological Observation Station for Investigation Works