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Preparatory Survey for Yeghvard Irrigation System Improvement Project

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Preparatory Survey for Yeghvard Irrigation System Improvement Project STATE COMMITTEE OF WATER ECONOMY MINISTRY OF ENERGY INFRASTRUCTURES AND NATURAL RESOURCES THE REPUBLIC OF ARMENIA PREPARATORY SURVEY FOR YEGHVARD IRRIGATION SYSTEM IMPROVEMENT PROJECT FINAL REPORT (FR) APPENDIXES NOVEMBER 2016 JAPAN INTERNATIONAL COOPERATION AGENCY (JICA) SANYU CONSULTANTS INC. (SCI) ORIENTAL CONSULTANTS GLOBAL CO., LTD. (OCG) 3R JR 16-032 CONTENTS OF APPENDIXES Appendix A: Current Conditions of Irrigation Facilities ................................. APP A-1 Appendix B: Agriculture ............................................................................... APP B-1 Appendix-C: Results of Surveys Carried out and WUA Workshops ...........APP C-1 Appendix-D: Meteorology, Hydrology and Water Resource .........................APP D-1 Appendix-E: Irrigation Planning .................................................................... APP E-1 Appendix-F: Geological and Hydro-geological Conditions ........................... APP F-1 Appendix-G: Reservoir Planning ................................................................. APP G-1 Appendix-H: Estimation of Leakage Rate ....................................................APP H-1 Appendix-I: Laboratory Test ........................................................................ APP I-1 Appendix-J: Conditions and Results of Dam Stability Analysis ................... APP J-1 Appendix-K: Environmental and Social Considerations ............................... APP K-1 Appendix-L: Project Cost ............................................................................. APP L-1 Appendix-M: Project Evaluation ................................................................... APP M-1 APPENDIX A Current Conditions of Irrigation Facilities APP A-1 Appendix-A: Current Conditions of Irrigation Facilities (1)Arzni Branch Canal 1) Condition of irrigation ・ This canal is an open one of concrete of the extension L=14.55km that starts from the division work of Arzni-Shamiram Canal. Location of the irrigation facilities of this canal is shown in Figure A-10. Dimensions and design specifications of this canal are shown in the Table A-1. Figure A-1 Intake of Arzni-Branch Canal (No.1) Figure A-2 Arzni-Branch Canal (No.4) ・ Upstream portion of this canal is being managed by Yeghvart WUA and downstream portion of this canal is being managed by Ashutarak WUA. Water intake from the Arzni-Shamiram Canal is performed every WUA. Ashutarak WUA are not using running water from the upstream of this canal and have directly water intake by the pipeline from Arzni-Shamiram Canal and have water distribution by a pipeline network to the beneficiary areas of Arzni-Branch Canal. Yeghvart WUA’s Area Figure A-3 Border of Yeghvart Figure A-4 Intake of pipe fromArzni- WUA and Ashtarak WUA Shamiram Canal to Arzni Branch Canal Figure A-5 Inlet of pipe from Arzni- Figure A-6 Outlet of pipe from Arzni- Shamiram Canal to Arzni Branch Canal Shamiram Canal to Arzni Branch Canal APP A-2 ・ Downstream of the canal than No.33 point is not currently in use. Surplus water is used for irrigation of agricultural land around Sasunik town. Figure A-7 End of using canal (No.33 ) ・ The discharge of this canal is 7.0m3/s at the beginning part and 2.0m/s at the end part. The canal cross section is B1.9m × H1.4m at the beginning part and B2.5m × H1.5m, at the end part. For more information, refer Table A-1 Arzni-Branch Canal’s dimensions and specifications. ・ Although the Connection Canal for water injection into Thakahan Canal near the end of this canal can be confirmed, it is not currently used. Figure A-8 Connection Canal to Thakahan Figure A-9 Connection Canal to Thakahan Canal (No.42 ) Canal (No.42 ) APP A-3 Figure A-10 A-10 Figure Canal Arzni-Branch of Irrigation Facilities of the Location APP A-4 Table A-1 Arzni-Branch Canal’s Dimensions and Specifications Arzni branch canal Conser Discharge NN D/M Length b, m B, m Hst, m Code Q, m3/s 1 0+00 0+90 90 C 1.0 2.5 1.5 7.0 2 0+90 2+00 110 C 1.0 2.5 1.5 7.0 3 2+00 2+35 35 C 0.7 2.2 1.5 7.0 4 2+35 4+95 260 C 0.6 2.1 1.5 7.0 5 4+95 6+00 105 C 0.7 2.5 1.8 7.0 6 6+00 10+20 420 C 0.8 2.8 2.0 7.0 7 0+25 B 7.0 8 3+50 B 7.0 9 8+80 B 7.0 10 9+10 B 7.0 11 10+00 - G - 12 10+20 11+20 100 C 0.8 2.6 1.8 7.0 13 11+20 11+50 30 C 2.5 2.5 2.5 7.0 1.0 3.0 2.0 14 11+50 29+00 1750 C 7.0 2.5 5.0 2.5 15 11+70 - OUT - 16 29+00 32+00 300 C 1.8 4.3 2.5 7.0 17 37+60 - OUT - 18 32+00 37+90 590 C 1.3 3.8 2.5 7.0 19 37+90 38+25 35 C 2.0 2.0 2.5 7.0 20 38+25 38+75 50 A 2.0 2.0 2.5 7.0 21 38+75 39+10 35 C 2.0 2.0 2.5 7.0 22 39+10 49+10 1000 C 1.5 4.0 2.5 7.0 23 46+00 - OUT - 8.0 3.1 2.5 24 49+10 52+00 290 C 7.0 1.5 4.5 3.0 25 52+00 56+00 400 C 1.2 3.8 2.6 6.0 26 56+00 56+50 50 C 1.3 3.9 2.6 6.0 27 56+50 61+00 450 C 1.3 3.9 2.6 6.0 29 59+00, 59+30; 59+40 3 OUT - 30 61+00 64+50 350 C 1.2 3.6 2.4 6.0 31 64+50 69+00 450 C 1.2 3.7 2.5 6.0 32 69+00 72+80 380 C 1.3 3.3 2.0 4.3 33 72+80 88+00 1520 C 1.3 3.3 2.0 4.3 34 88+00 97+00 900 C 1.3 3.6 2.3 4.3 35 97+00 105+00 800 C 1.2 3.9 2.7 4.3 36 105+00 107+50 250 C 1.2 3.9 2.7 4.0 37 107+50 - OUT - 38 107+50 107+90 40 A 2.0 2.0 2.0 3.6 39 107+90 123+00 1510 C 1.5 4.1 2.6 3.6 40 123+00 130+00 700 C 0.8 2.0 1.2 2.8 41 130+00 136+00 600 C 1.0 2.7 1.7 2.8 42 136+00 - OUT - 43 136+00 137+50 150 C 0.8 2.3 1.5 2.8 44 137+50 143+00 550 C 0.8 2.3 1.5 2.8 45 143+00 143+80 80 C 1.5 1.5 1.5 2.8 48 143+80 144+50 70 C 0.4 1.6 1.2 2.8 49 144+50 145+00 50 A 1.5 1.5 1.2 2.8 50 145+00 145+50 50 C 0.8 2.3 1.5 2.8 51 145+50 148+50 300 C 0.5 2.0 1.5 2.0 52 148+50 152+50 400 C 0.5 1.9 1.4 2.0 53 152+00 S 2.0 54 152+50 170+50 1800 S d = 700 2.0 55 145+50 B 2.8 Constraction Code C - Canal B m S - Syphon A - Aqueduct Hst. m IN - Intake OUT - Outlet b m G - Gally B - Bridge O - Others APP A-5 ・ The current beneficiary area under this canal is 1428ha in the estimation, the maximum water intake amount is estimated at Q = 1.084m3 / s. ・ Diversion from this canal to tertiary canals has been carried out by opening and closing the distribution gate. Although distribution gate has been confirmed 38 places, gate leafs of 7 places under the control of Ashutarak WUA (No.33,35,41,43,44) are missing and 12 places (No.34,35,36,38,40,41,42,43,44) of downstream of No.33 point are not currently used. Figure A-10 shows Gate positions. Although the size of gates is different in B = 0.30m ~ 0.95m × H = 0.5m ~ 1.9m, Diversion per one gate is estimated to be 0.02 ~ 0.04m3/s approximately from the following. a) Estimated from the maximum water intake and distribution gate number Maximum water intake 1.084m3/s÷distribution gates in use 26places =0.04m3/s b) Estimated from the water depth measured by water measurement facility of downstream side of distribution gate (No.8 point) Vc=√(9.81×0.05)=0.70m/s Q=0.05×0.60×0.70=0.021m3/s Figure A-11 Distribution Gate (Slide Gate) Figure A-12 Distribution Gate (Bulb) (No.3 ) (No.34) 2) Condition of facilities (Deterioration and damage) ・ The upstream portion of this canal under the control of Yeghvart WUA is renovated in recent years, except for the most upstream section, The condition of canal is generally good (Figure A-13). ・ It is found a damaged concrete portion at side wall at about 500m section of the non-renovation of downstream of crossing point of railway portion near the intake structure of this canal (Figure A-14). ・ It is found water leakage from the joint of the side wall of the No.18 point aqueduct bridge (Figure A-15). APP A-6 Figure A-13 Upstream of Canal under Figure A-14 Damaged Concrete at Control of Yeghvart WUA (No.4 ) Side Wall of Canal (No.2) Figure A-15 Leakage from Joint at side Wall of Aqueduct Bridge (No.18) ・ It is found significant damaged concrete portions and cracks at side wall and bottom of channel within section that is currently being used up to No.33 point (Figure A-16 to A-18).
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