CWC - Central Water Commission

Overview of CWC’s Flood Forecasting Sites 2019: North East India

Central Water Commission (CWC) monitors water level at several hundred sites in the country during monsoon every year. It publishes this information on its Flood Forecast (FF) website[I]. The website has three ways to get this information: Data Flow Map, List Based Exploration, and Hydrograph view. The Hydrograph view provides information for past 72 hours, supposed to be updated every hour. This is in addition to the list of current forecasts.

The CWC’s FF website had in 2018 monsoon, information about 226 Flood Forecast Sites in the country comprising of 166 Level Forecast Sites and 60 Inflow Forecast Sites. It also monitors 700 Flood sites, information made available through List Based Exploration and Hydrograph View. As reported below, the number of sites have gone up during 2019 monsoon, which is welcome. However, most of the new sites, along with some old ones do not have key information.

In order to better understand the CWC’s flood monitoring and forecasting work, in this article we have given state wise list of CWC’s Level Forecast, Inflow Forecast and level monitoring sites in North East India during 2019 monsoon. We have also included part of West Bengal that is in Brahmaputra basin here, in addition to the 8 North Eastern states. Similar report has been published for North India[II] and we hope to publish reports covering other regions of India too.

ARUNACHAL PRADESH In 2018, the CWC had from this state had 11 sites comprised of 2 Level Forecasting and 9 Level Monitoring sites. In 2019, CWC has added 10 more sites in the state taking total tally to 21 which includes 3 Level Forecasting and 18 Level Monitoring sites. The third Level Forecasting site Yinkiang added to the list does not have HFL level and date. The state has no Inflow Forecasting site. China Bridge Level Monitoring site earlier wrongly mentioned on Tawang river instead of Manas still misses HFL level and Date.  

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Inactive, incomplete hydrographs from Arunachal Pradesh states. It is worth to mention that 10 of Andhra Pradesh districts were wrongly mentioned in Arunachal Pradesh.

Several districts names are mentioned twice with small and capital letters serving no purpose. The district for Yazili site is mention as Subasiri in place of Subansiri. CWC has even included 10 districts from Andhra Pradesh in the state. Earlier River name for Namsai site was given Lohit and DL, WL, HFL was given as 140.6, 141.1, 144.46, HFL reached in 1979, all of that has been changed, without any explanation.

Arunachal Pradesh List Level Forecasting Sites in 2019

SN Site River Sub-Basin/ Basin District WL DL HFL, M HFL Date Hydrograph Active ?
1 Yinkiang[III] Siang Siang / Brahmaputra Upper Siang 303.0 304.0 NA NA Yes
2 Passighat Siang Siang / Brahmaputra East Siang 152.96 153.96 157.54 11-06-2000 Yes
3 Namsai[IV] Nao Dehing Lohit/ Brahmaputra Lohit 144.8 145.8 146.6 31-08-1974 Yes

 Arunachal Pradesh List of Level Monitoring Sites in 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date Hydrograph Active
1 Kibithu Lohit Lohit/ Brahmaputra Anjaw 1229.8 25-07-2016 Yes
2 Lemeking Subansiri Subansiri / Brahmaputra Upper Subansiri 1107.16 27-07-2016 Yes
3 Yazali[V] Ranganadi Subansir/Brahmaputra Lower Subansiri 623.1 14-06-2008 Yes
4 Tuting Siang Siang / Brahmaputra Upper Siang 420.43 06-09-2010 Yes
5 Seppa Kameng Kameng / Brahmaputra East Kameng 342.6 26-06-1998 Yes
6 Miao Nao Dehing Nao Dehing / Brahmaputra Changlang 241.57 09-07-2004 Yes
7 Daporizo Subansiri Subansiri / Brahmaputra Upper Subansiri 213.9 15-10-1987 Yes
8 Tezu Lohit Lohit/ Brahmaputra Lohit 192.14 16-07-1996 Yes
9 Bhalukpong Kameng Kameng / Brahmaputra West Kameng 141.79 16-06-1989 Yes
10 YINGKIONG Siang Siang / Brahmaputra Upper Siang NA NA Yes
11 Pangin Siang Siang/ Brahmaputra East Siang NA NA Yes
12 Boleng Siyum Siang/ Brahmaputra West Siang NA NA Yes
13 Kabu basti (Kambang) Siyum Siang/ Brahmaputra West Siang NA NA Yes
14 Pagoda Lohit Lohit/ Brahmaputra Namsai NA NA Yes
15 China Bridge* [VI] Manas Tawang / Brahmaputra Tawang NA NA Yes
16 Muruga Bridge Tawang Chu Tawang / Brahmaputra Tawang NA NA Yes
17 Jollang Sinki Brahmaputra Papum Pare NA NA Yes
18 Jotte Dikrong Brahmaputra Papum Pare NA NA Yes

ASSAM In 2018 Assam had 62 Sites comprised of 29 Level Forecasting and 33 Level Monitoring sites. This year CWC has added 1 Level Forecasting and 56 Level Monitoring sites in the state. So now there are 118 sites including 30 Level Forecasting and 88 Level Monitoring sites. Mathanguri site has been removed from Level Monitoring to Level Forecasting list. Dharamtul, Manas NH Crossing Level Forecasting sites and Bokajan, Borkhola (Barkhola), Dholai (DHOLAI) Matijuri (Matizuri) Level Monitoring sites are repeated twice. Hydrographs for 3 Level Monitoring sites are inactive and not updated for 12 sites. Similarly names of several districts are repeated under List Based Selection category.

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Slideshows showing defunct, incomplete hydrographs from Assam state. 

No Inflow Forecasting site in Assam is listed on CWC FF website, however, CWC’s Standarad Operating Procedure for Flood Forecasting in 2018 lists one: Lower Subansiri site on Subansiri river in Dhemaji district. That site seems non functional. Normally inflow forecasting site is associated with dam or barrage, the dam at Lower Subansiri site is still under construction, so this should not have appeared in the SOP document.

Assam List of Level Forecasting Sites in 2019

SN Site River Sub-Basin/ Basin District WL DL HFL, M HFL Date Hydrograph Active?
1 Dholabazar Lohit Lohit/ Brahmaputra Tinsukia 127.27 128.27 130.07  22-09-2012 Yes
2 NAHARKATIA Buridehing Buridehing/ Brahmaputra Dibrugarh 119.4 120.4 122.69 17-06-1973 Yes
3 Chenimari (Khowang) Buridehing Neodihing/ Upper Brahmaputra Dibrugarh 101.11 102.11 104.16 02-09-2015 Yes
4 Dibrugarh Brahmaputra Upper Brahmaputra/ Brahmaputra Dibrugarh 104.7 105.7 106.48 03-09-1998 Yes
5 Chouldhowaghat Subansiri Subansiri/ Brahmaputra Lakhimpur 99.43 100.43 101.31 27-07-1972 Yes
6 Mathanguri[VII] Manas Manas/ Brahmaputra Barpeta 98.1 99.1 100.28 30-10-1973 Yes
7 Ranganadi NT Rd Xing Ranganadi Teesta/ Brahmaputra Lakhimpur 93.81 94.81 95.92 02-07-1979 Yes
8 Nanglamoraghat Desang Upper Brahmaputra/ Brahmaputra Sibsagar 93.46 94.46 96.49 06-09-1998 Yes
9 Sivasagar[VIII] Dikhow Dikhow/ Brahmaputra Sibsagar 91.4 92.4 94.23 01-08-2018 Yes
10 Golaghat Dhansiri (S) Dhansiri/  Brahmaputra Golaghat 88.5 89.5 92. 45 11-10-1986 Yes
11 Neamatighat Brahmaputra Upper Brahmaputra/ Brahmaputra Jorhat 84.04 85.04 87.37 11-07-1991 Yes
12 Badatighat Subansiri Subansiri/ Brahmaputra Lakhimpur 81.53 82.53 86.21 28-07-1972 Yes
13 Numaligarh[IX] Dhansiri (S) Dhansiri/ Brahmaputra Golaghat 76.42 77.42 80.16 03-08-2018 Yes
14 NT Road Crossing Jia Bharali Jiabharali Kameng/  Brahmaputra Sonitpur 76.00 77.00 78.5 26-07-2007 Yes
15 Tezpur Brahmaputra Lower Brahmaputra/ Brahmaputra Sonitpur 64.23 65.23 66.59 27-08-1988 Yes
16 Kampur Kopili Lower Brahmaputra/ Brahmaputra Nagaon 59.5 60.5 61.79 20-07-2004 Yes
17 Dharamtul[X] Kopili Lower Brahmaputra/ Brahmaputra Marigaon 55.0 56.0 58.09 21-07-2004 Yes
  Dharamtul Brahmaputra Lower Brahmaputra/ Brahmaputra Marigaon 55.0 56.0 58.09 21-07-2004 No
18 Pagladiya NT Rd Xing Pagladiya Pagladiya/ Brahmaputra Nailbari 51.75 52.75 55.45 08-07-2004 Yes
19 Puthimari NH Rd Xing Puthimari Puthimari/ Brahmaputra Kamrup 50.81 51.81 55.08 31-08-2008 Yes
20 Guwahati (DC Court) Brahmaputra Dhansiri/ Brahmaputra Kamrup 48.68 49.68 51.46 21-07-2004 Yes
21 Manas N H Crossing[XI] Manas Manas/ Brahmaputra Barpeta 47.81 48.42 50.08 15-09-1984 Yes
  Manas NH Crossing Brahmaputra Brahmaputra Bongaigaon 47.81 48.42 50.08 15-09-1984 No
22 Beki Road Bridge Beki Beki/ Brahmaputra Barpeta 44.1 45.1 46.2  04-08-2000 Yes
23 Kokrajhar Gaurang Champabati/ Brahmaputra Kokrajhar 41.85 42.85 43.6 20-08-2015 Yes
24 Goalpara Brahmaputra Dhansiri South/ Brahmaputra Gaolpara 35.27 36.27 37.43 31-07-1954 Yes
25 Golokgunj Sankosh Sankosh/ Brahmaputra Dubri 28.94 29.94 30.95 08-09-2007 Yes
26 Dhubri[XII] Brahmaputra Lower Brahmaputra/ Brahmaputra Dhubri 27.62 28.62 30.36 28-08-1988 Yes
27 Matizuri[XIII] Katakhal Katakhal/ Barak Hailakandi 19.27 20.27 22.73 10-09-2007 Yes
28 Annapurnaghat[XIV] Barak Barak / Barak Cachar 18.83 19.83 21.84 01-08-1989 Yes
29 Badarpurghat Barak Barak / Barak Cachar 15.85 16.85 18.48 11-09-2007 Yes
30 Karimganj Kushiyara Barak/ Barak Karimganj 13.94 14.94 16.57 10-06-2010 Yes

Assam List of Level Monitoring Sites in 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date Hydrograph Active?
1 Matunga Kalanadi Lower Brahmaputra/ B’putra Nailbari 168.18 19-07-1980 Yes
2 DRF Puthumari Lower Brahmaputra/ B’putra Nailbari 144.43 28-08-1988 Yes
3 Margherita Buridehing Neo dehing/ Brahmaputra Tinsukia 137.51 26-08-1988 Yes
4 Bokajan[XV] Dhansiri South Brahmaputra Karbi Anglong 135.13 09-10-1986 Yes
5 Harangajao Jatinga Barak/ Barak North Cachar Hills 134.6 07-06-1996 Yes
6 Dillighat Desang Upper Brahmaputra/ B’putra Dibrugarh 129.65 28-08-1977 Yes/ Not updated
7 Desangpani Desang Upper Brahmaputra/ B’putra Sibsagar 106. 26 24-04-2016 Yes
8 Bihubar Dikhow Upper Brahmaputra/  B’putra Sibsagar 104.77 24-06-1998 Yes
  Mathanguri Manas Manas/ Brahmaputra Barpeta 102.28 30-10-1973  
9 Gelabil Doyang Dhansiri/ Brahmaputra Golaghat 101.05 18-06-1985 Yes
10 Suklai[XVI] Siklai Dhansiri/ Brahmaputra Kamrup 75.73 25-09-2018 Yes
11 Kheronighat Kopini Lower Brahmaputra/ B’putra Karbi Analong 74.07 19-07-2004 Yes
12 Bhomoraguri Brahmaputra Lower Brahmaputra/ B’putra Sonitpur 67.18 13-08-2017 Yes
13 PANBARI[XVII] Manas Manas/ Brahmaputra Barpeta 55.96 07-07-1991 Yes
14 KULSI[XVIII] Kulsi Dhansiri/ Brahmaputra Kamrup 55.59 08-10-2004 Yes
15 SONAPUR[XIX] Digaru Dhansiri/ Brahmaputra Kamrup 55.5 15-10-1991 Yes
16 AIE NH XING Aie Beki/ Brahmaputra Barpeta 53.26 21-08-2015 Yes
17 DUDHNAI[XX] Dudhnai Lower Brahmaputra/ B’putra Goalpara 51.27 22-09-2014 Yes
18 Pandu Brahmaputra Lower Brahmaputra/ B’putra Kamrup 49.88 06-09-1998 Yes
19 BAKSHIRHAT[XXI] Sankosh Brahmaputra Kokrajhar 46.65 NA No
20 PANCHARATNA[XXII] Brahmaputra Brahmaputra Goalpara 36.65 06-09-1998 Yes
21 Gharmura[XXIII] Dhaleswari Dolasor[XXIV]/ Barak Hailakandi 36.51 13-06-2018 Yes
22 BAHALPUR Champamati Champabati/ Brahmaputra Barpeta 35.8 15-06-1995 Yes
23 Monierkhal Sonai Barak/ Barak Cachar 32.18 01-08-1989 Yes/ Not updated
24 BALADOBA Sankosh Brahmaputra DHUBRI 30.7 08-09-2007 Yes
25 Amraghat Barak Barak/ Barak Cachar 29.99 31-07-1989 Yes
26 Lakhipur Barak Barak/ Barak Cachar 26.96 31-07-1989 Yes
27 DHOLAI Rukni Barak/ Barak Cachar 28.24 22-07-1993 Yes/ Not updated
  Dholai[XXV] Barak Barak/ Barak Cachar 28.24 22-07-1993 Yes
28 Fulertal Barak Barak/ Barak Cachar 26.39 21-07-2004 Yes
29 TULARGRAM Sonai Barak/ Barak Cachar 24.73 01-08-1989 Yes            Not Updated
30 AP Ghat Barak Barak/ Barak Cachar 21.763 11-09-2007 Yes
31 Borkhola[XXVI] Jatinga Barak/ Barak Cachar 21.7 07-06-1993 Yes
32 ANIPUR Barak Barak Karimganj 20.0 15-09-1984 Yes
33 FAKIRABAZAR Barak Barak/ Barak Karimpur 18.575 12-05-1991 Yes            Not Updated
34 B.P. Ghat Barak Barak/ Barak Karimpur 18.48 12-09-2007 Yes            Not Updated
35 GUMRA Kushiyara Barak/ Barak Cachar 18.35 25-06-1988 Yes             Not updated
36 Udaipur Tirap Brahmaputra Tinsukia NA NA Yes
37 Mojowari Kopini Brahmaputra Dima Hasao NA NA Yes
38 Balighat Subansiri Brahmaputra Lakhimpur NA NA Yes
39 Dihingmukh Jaibharali Brahmaputra SIBSAGAR NA NA Yes
40 Doomdooma Brahmaputra Brahmaputra Tinsukia NA NA Yes
41 Sholmari Brahmaputra Brahmaputra NALBARI NA NA Yes
42 Kothara/Noa Brahmaputra Brahmaputra NALBARI NA NA Yes
43 Silghat Brahmaputra Brahmaputra NAGAON NA NA Yes
44 Morisuti Brahmaputra Brahmaputra NAGAON NA NA Yes
45 Banglabasti Brahmaputra Brahmaputra NAGAON NA NA Yes
46 Kamarpur Brahmaputra Brahmaputra MARIGAON NA NA Yes
47 Kaliajari Brahmaputra Brahmaputra MARIGAON NA NA Yes
48 Diprang Gaon Brahmaputra Brahmaputra MARIGAON NA NA Yes
49 Dherabhabari Brahmaputra Brahmaputra MARIGAON NA NA Yes
50 Bokajan Brahmaputra Brahmaputra Karbi Anglong NA NA Yes
51 Bskalighat Brahmaputra Brahmaputra Karbi Anglong NA NA Yes
52 B G Road Brahmaputra Brahmaputra SIBSAGAR NA NA Yes
53 Kusumbil Brahmaputra Brahmaputra Kokrajhar NA NA Yes
54 Satpokholi Brahmaputra Brahmaputra Kamrup NA NA Yes
55 Ramdia Brahmaputra Brahmaputra Kamrup NA NA Yes
56 Malibari Brahmaputra Brahmaputra Kamrup NA NA Yes
57 Changsari Brahmaputra Brahmaputra Kamrup NA NA Yes
58 Patacharkuchi Brahmaputra Brahmaputra Barpeta NA NA Yes
59 Guma Phoolbari Brahmaputra Brahmaputra Barpeta NA NA Yes
60 Khudrakhowa Brahmaputra Brahmaputra Barpeta NA NA Yes
61 Biswanath Ghat Brahmaputra Brahmaputra Biswanath NA NA Yes
62 Chaklagaon Brahmaputra Brahmaputra Bongaigaon NA NA Yes
63 Kurua Brahmaputra Brahmaputra DARRANG NA NA Yes
64 Bogibil Brahmaputra Brahmaputra DIBRUGARH NA NA Yes
65 Kakripara Brahmaputra Brahmaputra Dhubri NA NA Yes
66 South Salmara Brahmaputra Brahmaputra Dhubri NA NA Yes
67 Gahampai Brahmaputra Brahmaputra Dima Hasao NA NA Yes
68 Krungming Langso Brahmaputra Brahmaputra Dima Hasao NA NA Yes
69 Krishnai Brahmaputra Brahmaputra Golpara NA NA Yes
70 Baladmari Brahmaputra Brahmaputra Golpara NA NA Yes
71 Garampani Brahmaputra Brahmaputra Golaghat NA NA Yes
72 Machaigaon Brahmaputra Brahmaputra Golaghat NA NA Yes
73 Ririgaon Brahmaputra Brahmaputra Golaghat NA NA Yes
74 Teok Brahmaputra Brahmaputra JORHAT NA NA Yes
75 Kulichera Rukni Barak/ Barak Cachar NA NA No
76 Badarpur Rukni Barak/ Barak Karimganj NA NA Yes
77 Patharkandi Sonai Barak Karimganj Na NA Yes
78 Kashithal Sonai Barak/ Barak Cachar NA NA No
79 Borkhola Jatinga Barak/ Barak CACHAR NA NA Yes
80 Katigora Katakhal Barak Cachar NA NA Yes
81 LALA Katakhal Barak HAILAKANDI NA NA Yes
82 Muhammedpur Katakhal Barak HAILAKANDI NA NA Yes
83 CHIRIPOOL Barak Barak CACHAR NA NA Yes          Not updated
84 KALAIN Barak Barak Cachar NA NA Yes          Not Updated
85 LAKHIPUR -II Barak Barak Cachar NA NA Yes            Not Updated
86 UDHARBOND Barak Barak CACHAR NA NA Yes            Not Updated
87 NEAIRGRAM Barak Barak Cachar NA NA Yes            Not Updated
88 Jalalpur Boleshwar RD in Bangladesh Cachar NA NA Yes         Not Updated

MEGHALAYA There are 16 sites from the state on CWC FF site. Last year the number was 7 and CWC has added 9 more sites. There is no Level Forecasting and Inflow Forecasting sites in the state, all are level monitoring sites. Out of these 2 sites shown with Red colour are inactive like previous year. CWC has repeated names of many districts in the state under list based selection category.

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Defunct, incomplete hydrographs from Meghalaya state. 

Meghalaya List of Level Monitoring Sites in 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date Hydrograph Active?
1 Dawki Umngot Kynchiang and other south flowing rivers/  East Khasi Hills 73.47 28-05-2006 Yes
2 Kharkhana Myntudu Kynchiang and other south flowing rivers/  East Khasi Hills 47.0 23-04-1995 Yes
3 THERRIAGHAT Umnohryngkew Kynchiang and other south flowing rivers/  East Khasi Hills 20.62 15-06-1995 Yes
4 Dimapara Bugi Kynchiang and other south flowing rivers/  South Garo Hills 29.75 27-07-2007 Yes
5 SIBBARI Dareng Kynchiang and other south flowing rivers/  South Garo Hills 20.34 12-08-2017 Yes
6 THADRANG UMKHEN Brahmaputra East Khasi Hills NA NA Yes
7 Umkhen-II[XXVII] Brahmaputra Brahmaputra East Khasi Hills NA NA Yes
8 MYNTANGTIWEIH MYNTANGTIWEIH Brahmaputra Jaintia Hills NA NA Yes
9 Myndu Stage II, Dam Site Brahmaputra Kynchiang and other south flowing rivers/  Jaintia Hills NA NA No
10 Myntdu Stage-II power house Barak Kynchiang and other south flowing rivers/  Jaintia Hills NA NA No
11 RYMBAI Kalipai RD into Bangladesh Jaintia Hills NA NA Yes
12 UMKIANG Umkiang RD into Bangladesh Jaintia Hills NA NA Yes
13 Umsiang Brahmaputra Brahmaputra RI BHOI NA NA Yes
14 NONGSTOIN – I Kynshi RD into Bangladesh West Khasi Hills NA NA Yes
15 BALAT Umngi RD into Bangladesh West Khasi Hills NA NA Yes
16 Risiang Rishiang RD into Bangladesh West Khasi Hills NA NA Yes

MANIPUR The state still has only 1 Level Monitoring site. There is no Level and Inflow Forecasting site in the state like previous year.

Manipur List of Level Monitoring Sites in 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date Hydrograph Active
1 Chotebekra Barak Barak / Barak Imphal East 32.1 31-07-1989 Yes

TRIPURA There were 12 sites from the state on CWC FF website in 2018 comprising of 2 Level Forecasting and 10 Level Monitoring. CWC has added 2 Level Monitoring sites. So now there are 14 sites from Tripura on CWC Flood forecasting website. The Sonamura site is mentioned 4 times in CWC website with slightly different HFL level and date description and in one case the river and district is also different. There is no Inflow Forecasting site in the state. Name of several districts are repeated.

1 Tripura sonamura.png

Defunct, incomplete hydrographs from Tripura state.

Tripura List of Level Forecasting Sites in 2019

SN Site River Sub-Basin/ Basin District WL DL HFL, M HFL Date Hydrograph Active?
1 Kailashahar[XXVIII] Manu Barak and Others North Tripura 24.34 25.34 25.95 13-06-2018 Yes
2 Sonamura Gumti Barak and Others West Tripura 11.5 12.5 14.43 23-07-1993 Yes

 Tripura List of Level Monitoring Sites in 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date Hydrograph Active?
1 Manughat[XXIX] Manu Barak and Others North Tripura 46.97 11-06-1993 Yes
2 Kamalpur GDS Site Dhalai Barak and Others Dhalai 33.85 15-05-1984 Yes
3 Kumarghat GD Site Manu Barak and Others North Tripura 32.97 07-06-1993 Yes
4 Amarpur Barak Barak South Tripura 32.74 22-07-1993 Yes
5 KHOWAI Khowai Barak and Others West Tripura 28.005 24-06-2004 Yes
6 Kailashahar GDSQ Manu Barak and Others Unakoti 25.795 07-06-1993 Yes
7 Nutan Bazar GD Site Juri Barak and Others North Tripura 20.435 15-05-1984 Yes
8 Belonia Muhuri Barak South Tripura 16.98 04-08-1983 Yes
9 HAORA Haora Barak and Others West Tripura 12.14 24-06-2004 Yes
10 GAJARAIA Burima Barak and Others West Tripura 11.15 24-06-2004 Yes
11 Sabrum Muhuri Barak South Tripura NA NA Yes
12 Kadamtala Juri Barak and Others North Tripura NA NA Yes
  Sonamura-II Gumti Barak Sepahijala NA NA Yes
  sonamura Brahmaputra Brahmaputra West Tripura 14.42 23-07-1993 No
  Sonamura Gumti Barak Sepahijala 14.43 24-04-1993 Yes

MIZORAM In 2018 the CWC FF website had 7 Level Monitoring sites from Mizoram. Now 18 more has been added by CWC increasing the numbers to 25. The state has no Level Forecasting or Inflow Forecasting sites. Out of these 25 sites hydrograph are active only for 2 sites Sairang and Turial. The Turial site is repeated in small and capital letters with different river and district.

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Slideshow on defunct, incomplete hydrographs from Mizoram state.

Mizoram List of Level Monitoring Sites in 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date Hydrograph Active?
1 Turial[XXX] Barak Barak Aizawl 149.0 17-06-1995 Yes
2 Sairang [XXXI] Dhaleswari Dhaleswari /Barak Aizawl 72.255 10-06-1993 Yes
3 DARLUNG Dhaleswari Dhaleswari /Barak Aizawl NA NA No
4 TLAWNG HEP Dhaleswari Dhaleswari /Barak Aizawl NA NA No
5 BAIRABI Dhaleswari Dhaleswari/ Barak Kolasib NA NA No
6 SAIPHAI Dhaleswari Dhaleswari /Barak Kolasib NA NA No
7 DAPCHHUAH Dhaleswari Dhaleswari/Barak Mamit NA NA No
8 Reiek Kai Dhaleswari Dhaleswari/Barak Mamit NA NA No
9 SAIKHWTHLIR Dhaleswari Dhaleswari/Barak Mamit NA NA No
  TUIRIAL Sonai Barak Aizawl NA NA No
10 TUIVAI Barak Barak Aizawl NA NA No
11 Tuivawl Barak Barak Aizawl NA NA No
12 Bailley Bridge Tuipui Barak Barak Champhai NA NA No
13 Sihthangpui Kolodyne[XXXII] Kolodyne/ Barak Lawngtlai NA NA No
14 HRUITEZAWL Kolodyne RD in Myanmar Lawngtlai NA NA No
15 PANGKHUAH Kolodyne RD in Myanmar Lawngtlai NA NA No
17 Keitum[XXXIII] Tuichang Barak/ Barak Lunglei NA NA No
18 Tuichang[XXXIV] Tuichang Barak/ Barak Lunglei NA NA Yes (not           updated)
19 Tuichawng Tuichang Barak/ Barak Lunglei NA NA No
20 MAT SEKAWI Mat RD in Myanmar Lunglei NA NA No
21 MAT 2 Mat RD in Myanmar Lunglei NA NA No
22 TUIPUI D[XXXV] Tuipui RD in Myanmar Lunglei NA NA Yes (not           updated)
23 MATESWARI Karnaphuli RD in Bangladesh Lunglei NA NA No
24 Tlabung Karnaphuli RD in Bangladesh Lunglei NA NA No
25 SILSURI Karnaphuli RD in Bangladesh Lunglei NA NA No

SIKKIM There have been few significant changes in the CWC FF website for sites from Sikkim. Last year the state had 22 sites including 18 Level Monitoring and 4 Inflow Forecasting sites. Out of these 22 sites 17 were inactive including 14 Level Monitoring and 3 Inflow Forecasting sites.

In 2019 the CWC has added 4 new Level Monitoring sites and 1 Inflow Forecasting site, mentioned in Sky Blue colour  in tables below. It has also shifted 3 sites Singtham, Milli and Rothak from Level Morning to Level Forecasting adding WL, DL, HFL Level but HFL date is not given for any of them. So earlier the state had no Level Forecasting site but now has 3.

Similarly, CWC has removed 2 Level Monitoring sites Lachen and Upper Rimbi located on Teesta and Rangit river in North and West districts. Also it has changed name of Chungthang Bop Level Monitoring site to Chungthang (Lachung Chu) Bop.

So now the state has 25 sites comprised of 3 Level Forecasting, 17 Level Monitoring and 5 Inflow Forecasting. Out of 17 Level Monitoring site HFL level and date is available only for 4 sites. Hydrographs for 3 sites are inactive and 4 sites are not upto date till the time this analysis is done. Similarly FRL, MWL information is given for only 1 Inflow Forecasting site out of 5.

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Inactive, incomplete hydrographs from Sikkim state.

Sikkim List of Level Forecasting Sites 2019

SN Site River Sub-Basin/ Basin District WL DL HFL, M HFL Date Hydrograph Active
1 Singtham Teesta Teesta/ Brahmaputra East 377.07 377.57 379.17 NA Yes
2 Rothak Rangit Teesta/ Brahmaputra West 350.6 351.6 353.2 NA Yes
3 Milli Teesta Teesta/ Brahmaputra South 223.0 224.0 225.25 NA Yes

Sikkim List of Level Monitoring Sites 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date Hydrograph Active?
1 Sankalan Teesta Teesta/ Brahmaputra North 762.3 16-06-1973 No
2 Rangpo Teesta Teesta/ Brahmaputra South 304.6 26-07-1972 Yes
3 KHANITAR Teesta Teesta/ Brahmaputra East 297.7 18-09-1974 Yes
4 Majitar Teesta Teesta/ Brahmaputra South 279.29 17-10-1985 Yes
5 Tarum Chu Teesta Teesta/ Brahmaputra North NA NA No
6 Bakcha chu Teesta Teesta/ Brahmaputra North NA NA Yes           Not Updated
7 Chungthang           (Lachen Chu) RR Teesta Teesta/ Brahmaputra North NA NA Yes
8 Chungthang          (Lachung Chu) Bop Lachung Chu Teesta/ Brahmaputra North NA NA Yes
9 Dickchu Teesta Teesta/ Brahmaputra North NA NA Yes
10 Sankalang Teesta Teesta/ Brahmaputra North NA NA Yes
11 Rangit Nagar Rangit Teesta/ Brahmaputra South NA NA Yes
12 Chujachen             (Rongli Chu) Teesta Teesta/ Brahmaputra East NA NA Yes           Not Updated
13 Rorathang Teesta Teesta/ Brahmaputra East NA NA Yes           Not Updated
14 Chujachen            (Rangpo Chu) Rangpochu Teesta/ Brahmaputra East NA NA Yes           Not Updated
15 Kalez Khola           (Toyum) Teesta Teesta/ Brahmaputra West NA NA No
16 Sagbari Rangit Teesta/ Brahmaputra West NA NA Yes
17 Yaksum Rangit Teesta/ Brahmaputra West NA NA Yes

 Sikkim List of Inflow Forecasting sites 2019

SN Sites River Sub-Basin/ Basin District FRL MWL Hydrograph Active?
1 Rangit 3 Dam Rangit Teesta/ Brahmaputra West NA NA Yes
2 Rangpo Dam Rangpochu Teesta/ Brahmaputra East NA NA No
3 Rongli Dam Rangpochu Teesta/ Brahmaputra East NA NA No
4 Teesta 3 Dam Lachung Chu Teesta/ Brahmaputra North NA NA Yes
5 Teesta V Dam Brahmaputra Brahmaputra North 568.0 569.6 Yes

 Sikkim List of removed Level Monitoring sites 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date
1 Lachen Teesta Teesta/ Brahmaputra North NA NA
2 Upper Rimbi Rangit Teesta/ Brahmaputra West NA NA

WEST BENGAL (BRAHMAPUTRA BASIN) In 2018, there were 21 sites (6 Level Forecasting and 15 Level Monitoring) sites in in Sub-Himalayan zone of Brahmaputra Basin in West Bengal. This year, CWC has upgraded one Level Monitoring site to Level Forecasting site (Hasimara) and added 3 Level Monitoring sites in the basin taking total tally to 24 sites. Hydrographs for 2 Level Monitoring sites are inactive. There is no Inflow Forecasting site in Brahmaputra Basin in West Bengal.

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Defunct, incomplete hydrographs from West Bengal state.

West Bengal (Brahmaputra Basin) List of Level Forecasting Sites in 2019

SN Site River Sub-Basin/ Basin District WL DL HFL, M HFL Date Hydrograph Active?
1 Hasimara[XXXVI] Torsa Torsa/ Lower B’putra Jalpaiguri 116.3 116.9 118.5  13-07-1996 Yes
2 DOMOHANI Teesta Teesta/ L Brahmaputra Jalpaiguri 85.65 85.95 89.3 04-10-1968 Yes
3 Jaldhaka NH 31[XXXVII] Jaldhaka Jaldhaka/ L Brahmaputra Jalpaiguri 80.0 80.9 82.33 28-07-1972 Yes
4 Mekhliganj Teesta Teesta/ L Brahmaputra Koch Bihar 65.45 65.95 66.45 13-07-1996 Yes
5 Mathabhanga Jaldhaka Jaldhaka/ LBrahmaputra Koch Bihar 47.7 48.2 49.85 07-09-2007 Yes
6 Ghugumari Torsa Torsa/ L Brahmaputra Koch Bihar 39.8 40.41 41.46 03-08-2000 Yes
7 Tufanganj Raidak-1 Torsa/ L Brahmaputra Koch Bihar 34.22 35.3 36.5 12-08-2017 Yes

West Bengal (Brahmaputra Basin) List of Lever Monitoring Sites in 2019

SN Site River Sub-Basin/ Basin District HFL, M HFL Date Hydrograph Active?
1 Singlabazar Teesta Teesta/ B’putra Darjiling 311.0 05-09-1980 No
2 TEESTA BAZAR Teesta Teesta/ B’putra Darjiling 217.0 13-10-1973 No
3 GHISH Teesta Teesta/ B’putra Jalpaiguri 164.8 27-07-1972 Yes
4 CHEL Teesta Teesta/ B’putra Jalpaiguri 160.8  10-07-1971 Yes
5 CORONATION Teesta Teesta/ B’putra Darjiling 156.0 12-10-1973 Yes
6 SEVOKE Teesta Teesta/ B’putra Darjiling 147.3 12-10-1973 Yes
7 NEORA Teesta Teesta/ B’putra Jalpaiguri 166.7 24-07-1970 Yes
8 Gazoldoba Teesta Teesta/ B’putra Jalpaiguri 111.4 19-07-1990 Yes
9 DIANA Jaldhaka Jaldhaka/ Lower B’putra Jalpaiguri 196.55 19-07-1980 Yes
10 Nagrakata Jaldhaka Jaldhaka/ Lower B’putra Jalpaiguri 160.8 13-10-1978 Yes
11 MURTI Jaldhaka Jaldhaka/ Lower B’putra Jalpaiguri 141.45 28-07-2007 Yes
12 Barabisha Sankosh Sankosh/ Lower B’putra Jalpaiguri 50.1 13-10-1973 Yes
13 SANKOSH LRP Sankosh Sankosh/ Lower B’putra Koch Bihar 49.25 09-07-2017 Yes
  Hasimara Torsa Torsa/ Lower B’putra Jalpaiguri 118.5  13-07-1996  
14 Chepan Raidak-1 Torsa/ Lower B’putra Jalpaiguri 49.15 13-10-1973 Yes
15 Ambari Torsa Torsa/ Lower B’putra Koch Bihar 42.78 21-07-1993 Yes
16 SHALADANG Torsa Torsa/ Lower B’putra Koch Bihar 37.07 21-07-1993 Yes
17 Suldaguri Brahmaputra Lower B’putra Koch Bihar 35.3 21-07-1993 Yes

Summary The tables here shows that in 2018 CWC FF website had from NE India 148 sites in North East India comprising of 42 Level Forecasting, 100 Flood monitoring and 6 Inflow Forecast sites, out of these, 33 sites including 4 Level Forecast, 24 Level monitoring and 5 Inflow Forecast Sites were inactive.

This year, CWC has added 96 sites taking total tally to 244. Now there are 55 Level Forecasting, 184 Level Monitoring and 5 Inflow Forecasting sites in North East India.

About 50 percent (118) of the sites are in Assam state alone followed by Sikkim (25), Mizoram (25) West Bengal (Brahmaputra) (24), Arunachal Pradesh (21), Meghalaya (16) and Tripura (14). Like last year, there is still no site from Nagaland.

Summary Table of Level and Inflow Forecast, Monitoring Sites in North East India

States Level Forecast

Sites

Level Monitoring Sites Inflow Forecast

Sites

Total
Active Inactive Active Inactive Active Inactive
Arunachal Pradesh 3 0 18 0 0 0 21
Sikkim 3 0 15 2 3 2 25
Assam 30 0 86 2 0 0 118
Nagaland 0 0 0 0 0 0 0
Meghalaya 0 0 14 2 0 0 16
Manipur 0 0 1 0 0 0 1
Tripura 2 0 12 0 0 0 14
Mizoram 0 0 20 5 0 0 25
W Bengal 17 0 7 0 0 0 24
Total 55 0 173 11 3 2 244
NE India 55 184 5 244

MAJOR GAPS Besides the large number of non functional sites and information gaps, there are other major gaps in CWC’s flood forecasting, some of them are listed below.

  • North East being highly flood prone, CWC needs to do much more to ensure that its flood forecasts reach the people who are in flood prone areas.
  • CWC has no flood forecasting sites in four full states: Manipur, Nagaland, Meghalaya and Mizoram. How can there be any justification for this?
  • In whole of flood prone Manipur, CWC has just one monitoring site. No level or inflow forecasting sites. This is clearly hugely inadequate.
  • Most of the Mizoram’s flood monitoring sites are not showing anything, this needs urgent attention. CWC also needs to add some key sites from Mizoram among its flood forecasting sites.
  • CWC needs to add more sites in Tripura, considering the large number of rivers in this state.
  • In Arunachal Pradesh, CWC has no sites in a number of important rivers, including Dibang, Ranganadi, among others. In the huge and important Siang basin, it certainly needs many more sites than the two that CWC has.
  • For all the sites, the available information should be archived for at least five years and permanently for the HFL year.

In addition, there are many other issues with respect to the actual flood forecasting and monitoring by CWC, which are not dealt here.

A SANDRP analysis (ht.sandrp@gmail.com)

END NOTES:

  1. The sites shown with RED colour are inactive and shown with Sky Blue are newly added.
  2. Abbreviations List:

Warning Level – WL

Danger Level – DL

Full Reservoir Level – FRL

Maximum Water Level – MWL

High Flood Level – HFL

Meters – M

End Notes:

[I] http://india-water.gov.in/ffs/

[II] https://sandrp.in/2018/08/03/overview-of-cwc-flood-forecasting-sites-north-india/

[III] The site does not have HFL level and time. Hydrograph for the site does not show WL, DL.

[IV] Earlier River name was given Lohit and DL, WL, HFL was given 140.6, 141.1, 144.46, year of HFL given as 1979.

[V] District is wrongly spelt as Subasiri in List Based Selection category.

[VI] HFL level and date for China Bridge site is still missing. River has been changed from Tawang to Manas.

[VII] Mathanguri was last year shown in Level Monitoring list with 102.28 as HFL attained on 30-10-1973. Now it  has been included in Level Monitoring list and HFL level has been changed without giving any explanation.

[VIII] Previous HFL was 94.19 dated 25-06-1998, changed.

[IX] Previous HFL level was 79.87 date 4-09-1985.

[X] Site with same name repeated on Brahmaputra river.

[XI] Manas NH Crossing site is also shown in Bongaigaon district on Brahmaputra district with same WL, DL, HFL details.

[XII] HFL date for Dhubri is changed from 01-08-1989 to 28-08-1988 without giving any explanation. 

[XIII] There is one more Level Monitoring site spelled as MATIJURI with same HFL Level and Date. Its Hydropraph is not updated.

[XIV] Annapurnaghat HFL date changed from 02-09-1989 to 01-08-1989 without giving any explanation.

[XV] Bokajan site is repeated twice. HFL details are given for one and missing for the other.

[XVI] Last year HFL level was given 76.18 on 12-09-1983 which changed to 75.73 on 25-09-2018 now. If 76.18 was correct, how can 75.73, lower level, become new HFL? No explanation given.

[XVII] PANBARI Level Monitoring site in Barpeta had earlier 55.73 HFL dated 28-08-1980. It has been changed now to 55.96 on 07-07-1991 without giving any explanation.

[XVIII] HFL details for KULSI Level Forecasting Site has been added now.

[XIX] HFL details have been added for SONAPUR Level Monitoring site now.

[XX] HFL Level, Date has been added now.

[XXI] HFL level is given for Bakshirhat Level Monitoring site but date is not mentioned. Hydrograph for the site is inactive.

[XXII] HFL Level, Date has been added now.

[XXIII] HFL Level changed from 36.3 date 31-07-1989 to 36.51 date 13-06-2018.

[XXIV] Dolasar river enters in Bangladesh from there.

[XXV] Dholai site is repeated with small/capital letter. One is shown Rukni river, second on Barak. Hydrograph for DHOLAI is not updated.

[XXVI] Borkhola site in same district Cachar and on same river Jatinga is mentioned twice. HFL detail is given for only one. Hydrograph for both are active.

[XXVII] Hydrograph of the site is not updated.

[XXVIII] HFL has been crossed at Kailashahar site in 2018. Previous HFL level was 25.79 dated 07-06-1993.

[XXIX] HFL level and date for Manughat site is changed from 46.6, 05-06-2001 to 46.97, 11-06-1993 without giving any explanation.

[XXX] Turial site is mentioned twice in small and capital letters. HFL level, date and hydrograph detail is not given for TURIAL.

[XXXI] HFL level, date for Sairang site unavailable last year has been included now.

[XXXII] Kolodyne river flows to Myanmar.

[XXXIII] Keitum site is now shown on Tuichang. Last year it was wrongly shown on Tlawng river.

[XXXV] Hydrograph is not updated timely. On 27 Sept it was updated upto 25 Sept. 2019.

[XXXVI] Hasimara site has been shifted to Level Forecasting from Level Monitoring.

[XXXVII] HFL level is changed to 82.33 and date 28-07-1972 from 81.33 date 28-08-1972 without giving any explanation.

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