Annexure - Volume - II Phones: +91-11-30003200 Fax: (91 11) 22374775 August, 2015
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Cumulative Impact and Carrying Capacity Study of Subansiri Sub Basin including Downstream Impacts Submitted to: Submitted by: Central Water Commission, IRG Systems South Asia Pvt. Ltd. Ministry of Water Resources LGF, AADI Building Sewa Bhawan, R.K. Puram, 2, Balbir Saxena Marg, Hauz Khas, New Delhi – 110 066 New Delhi –110 016, INDIA India Tel: +91-11-4597 4597 Fax: +91-11- 2656 2050 In association with EQMS India Pvt. Ltd. 304 & 305, 3rd Floor, Plot No. 16, Final Report Rishabh Towers, Community Centre, Karkardooma, Delhi – 110 092 Annexure - Volume - II Phones: +91-11-30003200 Fax: (91 11) 22374775 August, 2015 2 Contents Annexure – 1.1 Scope of Work (SoW) .........................................................................................................................7 Annexure – 3.1 Details of Small Hydro Electric Projects (less than 25 MW) in Subansiri Basin ...............................15 Annexure – 4.1 Rainfall stations in Subansiri Basin, their class, coordinates and elevation .....................................17 Annexure – 4.2 Monthly and Annual Rainfall .............................................................................................................28 Annexure – 4.3 Average Temparature in Subansiri Basin .........................................................................................32 Annexure – 5.1 Compliance to the 68th Minutes to Meeting of EAC on Cumulative Environmental Impact Assessment of Subansiri Sub-Basin in Arunachal Pradesh held on 24th September 2013; comments and suggestions made in Minutes of the Meeting of TAC’s meeting held on June 11, 2014 and comments and suggestions received on Lower Subansiri HEP from NHPC...................46 Annexure – 6 .1 Pteridophytes of Subansiri Basin, Arunachal Pradesh and their uses ............................................52 Annexure – 6.2 Bryophytes Reported to Occur in Arunachal Pradesh/ Eastern Himalaya, their Threatened and Endemism Status .............................................................................................................................60 Annexure – 6.3 Endemic Angiosperm Taxa of Arunachal Pradesh...........................................................................72 Annexure – 6.4 Economically Important Species of Arunachal Pradesh......................................................................80 Annexure – 6.5 List of Selected Medicinally Important Plant Species and their indicative use in North East India.....102 Annexure – 6.6 Flowering plants reported to occur in Subansiri Basin, Arunachal Pradesh...................................142 Annexure – 6.7 List of Plant Species with their Family and Local Names Found at the Affected Area of Lower Subansiri Project at Dumporijo, Siberite – Gengi, Gerukamukh – I, Gerukamukh – II ..................194 Annexure – 6.8 Map & Habit / Distribution of Plant species in different study sites in the submergence area of Lower Subansiri Hydro Power Project ...........................................................................................206 Annexure – 6.9 List of Orchid species identified from submergence area of Lower Subansiri HEP and their rehabilitation in Orchidaria in Tipi and Gerukamukh ......................................................................220 Annexure – 6.10 Checklist of Plants of Family Ericaceae of Talle Wildlife Sanctuary in Lower Subansiri District of Arunachal Pradesh.........................................................................................................................226 Annexure – 6.11 Map Showing Terrestrial Sampling Locations & Phytosociological characters of plant species at different sampling locations............................................................................................................230 Annexure – 6.12 List of Fauna reported in Subansiri Basin, Arunachal Pradesh ....................................................258 Annexure – 6.13 List of Butterflies recorded in the Mishmi Hills, Arunachal Pradesh .............................................328 Annexure – 6.14 List of Threatened Fauna reported in Subansiri Basin, Arunachal Pradesh as per IUCN Classification of Threatened Species.............................................................................................338 Annexure – 6.15 Faunal species reported in Subansiri Basin, Arunachal Pradesh and listed in Schedules of Wildlife Protection Act, 1972 (as amended till date) ......................................................................372 Annexure – 6.16 List of Fauna reported in Talle Wildlife Sanctuary ........................................................................398 Annexure – 6.17 Description of Important Bird Areas Located in Upper Subansiri, Lower Subansiri and Kurung Kumey Districts, Subansiri Basin ...................................................................................................404 Annexure – 7.1 Tolerance and Classification...........................................................................................................416 Annexure – 7.2 Map Showing Water Quality Sampling Locations & Surface Water Quality...................................424 3 Annexure – 7.3 Map of Fish Sampling Locations & Fish species recorded at various HEPs site in different months during 2013 ....................................................................................................................................444 Annexure – 9.1 Plots of Subansiri and Brahmaputra river cross sections along with the maximum water level corresponding to 4 hours peaking..................................................................................................455 Annexure – 9.2 Flow depth, flow velocity and flow top width for lean discharge release condition, Monsoon discharge release condition and other four months discharge release condition of HEPs in Subansiri Basin ..............................................................................................................................469 4 Volume-II – Annexures 5 6 Annexure – 1.1 Scope of Work (SoW) (PREPARED FROM SECONDARY DATA & FIELD SURVEYS) 7 8 A. OBJECTIVE OF THE STUDY: 1. The basin study envisages providing optimum support for various natural processes and allowing sustainable activities undertaken by its inhabitants. The same is determined in terms of the following: Inventorisation and analysis of the existing resource base and its production, consumption and conservation levels. Determination of regional ecological fragility / sensitivity based on geo-physical, biological, socio-economic and cultural attributes. Review of existing and planned developments as per various developmental plans. Evaluation of impacts on various facets of environment due to existing and planned development. The study should involve assessment of stress load due to varied activities covering e.g. exploitation of natural resources, industrial development, population growth which lead to varying degree of impacts on various facets of environment. The basin study should also envisage a broad framework of environmental action plan to mitigate the adverse impacts on environment which should be in the form of: Preclusion of an activity Infrastructure development Modification in the planned activity Implementation of set of measures for amelioration of adverse impacts. The basin study is a step beyond the EIA, as it incorporates an integrated approach to assess the impacts due to various developmental projects. 2. STUDY AREA The study area to be covered as a part of the Basin Study is for entire Subansiri Basin. The study should be based on secondary as well as primary data collection. 3. PROJECTS ENVISAGED IN SUBANSIRI BASIN Nineteen (19) projects are envisaged in the study area to be covered in the Subansiri basin. The details of the same are given below in Table. Table: Projects on Subansiri River (Cascade development) Catchment Tail SI. Name of the Present Ht. of the Area FRL m Water No. project IC (MW) dam (m) (Sq.km) Level (m) 1. Oju – I 13350 700 1950 110 1670 2. Oju – II 13760 1000 1650 90 1300 3. Niare 14400 800 1280 100 1055 4. Naba 14300 1000 1035 110 780 5. Mili - 75 1400 - 1200 6. Sape - 38 1155 - 1080 7. Chomi - 80 1040 - 920 8. Chela - 75 900 - 805 9. Kurang I & II 2302 330 745 140 620 10. Tamen - 175 320 - 250 11. Tago – I - 55 1080 - 790 9 Catchment Tail SI. Name of the Present Ht. of the Area FRL m Water No. project IC (MW) dam (m) (Sq.km) Level (m) 12. Subansiri Lower 34900 2000 205 116 - 13. Subansiri 8100 1600 460 203 - Middle 14. Subansiri Upper 20250 2000 460 214 - 15. Nalo 14500 360 765 125 645 16. Dengser 17625 552 630 100 490 17. Tammu - 55 310 - 220 18. Nyepin - 32 1060 - 920 19. Hiya - 41 880 - 745 4. DATA COLLECTION In the present study emphasis should be laid on terrestrial and aquatic ecology. The estimation of supportive capacity of the basin should involve the preparation of the existing scenario i.e., the preparation of detailed data base of the basins. This should be accomplished through the steps outlined in following sections. 4.1 Meteorology The information on various meteorological aspects is to be collected from India Meteorological Department (IMD) for meteorological stations located within the basin area on in vicinity to the basin boundary. The information on various aspects such as rainfall, temperature wind, humidity etc. will be collected. 4.2 Water Resources The information on following aspects should be collected: Review of drainage characteristics of the basin, including various surface