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Environmental Screening Report Kandy Drainage Improvement; Rehabilitation of Meda Ela Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Project Management Unit Strategic Cities Development Project Public Disclosure Authorized July 2015 Strategic Cities Development Project/MoUDWS&D Page 1 Table of Contents 1. Project Identification 03 2. Project Location 03 3. Project Justification 09 4. Project Description 10 5. Description of the Existing Environment 24 6. Public Consultation 32 7. Environmental Effects and Mitigation Measures 35 7a. Screening for Potential Environmental Impacts 35 7b. Environmental Management Plan 42 8. Cost of Mitigation 67 9. Conclusion and Screening Decision 69 10. EMP Implementation responsibilities and Costs 72 11. Screening Decision Recommendation 72 12. Details of Persons Responsible for the Environmental Screening 73 Annexes 1. Location Map of the Project Area 2. Geological and Soil Map of the Project Area 3. Environmental Sensitive Area Map of the Project Area 4. Layout Plan along with some cross sections 5. List of Trees to be removed 6. Summary of Procedure to Obtain Mining License for Borrow Pit Operation 7. Summary of Procedure to Obtain Mining License for Quarry Operation 8. Best Practices in Waste Management Strategic Cities Development Project/MoUDWS&D Page 2 Strategic Cities Development Project Environmental Screening Report 1. Project Identification Project title Strategic Cities Development Project Kandy Drainage Improvement: Rehabilitation of Meda-Ela Project Proponent Strategic Cities Development Project of the Ministry of UrbanDevelopment, Water Supply and Drainage, Sri Lanka financed by the World Bank 2. Project Location Location Kandy, Central Province. (relative to the nearest town, highway) Location of the project is given in Annexure 01. Definition of Project Area Meda Ela which is 4.4 Km long is the main drainage path for the southern part of the city of Kandy. It commences from the spillway of (The geographical extent of the project & areas the Kandy Lake, flows in a south westerly direction adjacent to the affected during William GopallawaMawatha and discharges into the Mahaweli Ganga construction) at Getambe (Figure 1). Figure1: Hydro Network of Meda Ela Strategic Cities Development Project/MoUDWS&D Page 3 The initial reach of the Meda Ela, from the spillway of the Kandy Lake to about 1.3 km, consists of two sections of underground conduits in the city centre area, and an open drain joining the two underground sections. Figure 2: Entry Point to the First Open Reach Figure 3: First Open Reach Flows through Urbanized Area In the downstream area, theMeda Ela flows as an open drain close to the William GoppallawaMawatha and the Railway line, crossing the William GopallawaMawatha(at Ch. 1+870m)and the railway line(at Ch.4+220m) close to the discharge point at Getambe. Figure 4 shows end of the underground section near the Edmond Silva playground at Deiyannewela (Ch. 0+780m). Strategic Cities Development Project/MoUDWS&D Page 4 Figure 4: End of the Underground Section at Deiyannewela In the upstream reach of this drain section up to the William GoppallawaMawatha Bridge, the drain runs through heavily built up areas, with structures forming along the banks of the drain (Fig 5). The railway line and the William GoppallawaMawatha are on either side of the drain, and are very close near the bridge. Over 20 foot bridges crossings and 3 road crossings can be seen in this reach. The Meda Ela takes two sharp bends both sides of the William GoppallawaMawathaBridge. Figure 5 : Built Up Area Upstream to William GoppallawaMawatha Bridge Downstream of the bridge, the drain is around 2.5 km in length. In this Strategic Cities Development Project/MoUDWS&D Page 5 reach, the first 1.7 km the banks are protected with Gabions and Rubble Masonry walls (See Fig.6), and the balance length the banks are unprotected (See Figure 7). Figure 6: Protected with Gabions at Downstream to theMedaBowala Junction Figure 7: Unprotected Banks at Downstream Hydraulic parameters of Meda Ela is given below. Strategic Cities Development Project/MoUDWS&D Page 6 Max: Bed Bottom Water Max Max: Max: level Chainage (m) width Level Discharg Depth Velocit (m (m) (m e (m3/s) (m) y (m/s) MSL) MSL) 0.00 2.38 489.00 490.74 41.46 1.74 8.11 0+139.90 4.50 488.40 490.10 41.41 1.70 5.41 0+256.95 7.67 487.90 489.87 71.18 1.97 3.90 0+281.52 4.95 487.90 489.81 71.17 1.92 7.10 0+284 (Underground opening) 4.95 487.79 489.80 71.17 2.01 7.53 0+775 (Underground opening) (drop 0.5m) 3.91 482.45 484.56 71.26 2.11 7.95 0+776.63 3.91 482.00 484.55 71.26 2.55 4.86 0+797.93 3.97 481.88 484.51 79.16 2.63 7.58 0+803 (Bridge 10) 5.30 481.84 484.33 79.19 2.49 5.78 0+809.64 5.70 481.81 484.32 79.23 2.51 5.55 0+996.82 3.62 480.77 483.54 80.62 2.77 8.07 1+053.85 3.71 480.77 483.34 81.02 2.57 7.66 1+196 (Bridge 18) 4.37 479.60 482.82 82.29 3.22 6.33 1+221.07 5.00 479.52 482.61 82.50 3.09 7.72 1+237.31 (drop 0.5m) 4.04 479.00 482.57 82.67 3.57 10.44 1+534.29 3.82 477.45 480.72 132.71 3.27 10.08 1+556 (Bridge 24) 4.60 477.30 480.61 132.92 3.31 9.36 1+847.55 6.50 475.77 478.32 135.08 2.55 7.17 1+875 (Bridge 32) 8.60 475.58 477.90 135.35 2.32 7.19 1+888.8 (drop 0.25m) 9.84 475.41 477.59 135.42 2.18 6.32 1+921.77 6.70 475.27 477.46 135.65 2.19 9.25 2+305.15 12.92 473.63 475.90 142.81 2.27 5.16 2+445 (Bridge 34) 9.80 473.05 475.58 143.97 2.53 6.04 2+466.61 11.15 472.94 475.34 144.07 2.40 5.40 2+791.97 8.91 471.55 473.87 177.85 2.31 8.63 2+824.27 (drop 0.2m) 9.93 471.23 473.71 178.09 2.48 7.25 2+853.71 7.82 470.99 473.64 178.37 2.65 7.67 Strategic Cities Development Project/MoUDWS&D Page 7 3+378.91 9.65 468.18 470.88 207.98 2.70 7.98 3+381 (Bridge 40) 8.50 468.10 470.87 208.00 2.77 8.84 3+526.29 13.00 467.38 469.55 209.04 2.17 8.93 3+853.70 15.00 465.59 467.71 234.72 2.12 5.65 4+278.85 9.00 463.23 467.49 237.39 4.26 2.49 4+283.8 (Bridge 45) 4.70 463.00 467.28 237.41 4.28 11.81 4+297 (Bridge 46) 6.20 463.00 466.30 237.51 3.30 11.61 4+395.00 15.00 462.60 465.18 238.19 2.58 4.24 As per the hydrological parameters shown in the above table, it does not exist a uniform width of canal bottom. A maximum bottom width of 15m is recorded at Ch. 3+853.7 m and at Getambedischargepoint which is lying at Ch.4+395m. The canal depth is also not uniform along the canal since canal depth also varies according to the recordsshown in the table. Maximum depths which are 4.26 and 4.28 m recorded respectively at Ch. 4+278.85m and 4+283.8m.Maximum flow velocity of more than 11 m/s was reported at Ch. 4+283m and Ch. 4+297m. The table also provides proof to report that the canal flows relatively a steepy area since the bed level of the canal is gradually decreasing commencing from 489MSL (at Ch. 00m) and ending at 462.50MSL (at Ch. 4+395m) Hanthana Ela, Nagasthenna Ela, Dangolle Ela, and Heeressagala Ela merges with Meda Ela at Ch. 1250m, Ch. 1236m, Ch. 3892m and 2793m respectively. General Layout Plan is given in Annex 2. Adjacent land and Kandy lake is the main feature at the start of the canal. And also canal features ends at Mahaweli Ganga closer to the existing KMC water Intake at Getambe.Along the canal on both sides there are many developments. 375 number of families are residing on both sides of the canal.Some housing units have also been built on the top of the canal. 37 commercial units are located bordering to the canal. Five out of 37 commercial unitsrepresent mediumscale establishments whereas others are small scale commercial establishments.The total population close to the canal is 1250. The livelihood activities of thepeople in the immediate vicinity include commercial activities, mobile vendoring, handcrafting,dress making, hiring of labor and private sector sales Strategic Cities Development Project/MoUDWS&D Page 8 workers etc. The average monthly income varies fromRs. 30000 to 100000.The canal is also passing the Goodshedbus stand of Kandy and Railway Station. William GoppallawaMawatha and the Railway line are also adjacent to the site. Canal runs parallel to the William GopallawaMawatha from Deiyanwalabridge closer to the fire brigade on the Right hand Side (RHS) and from there to river mouth at Getambe on the Left Hand Side (LHS).