Technical Assistance Consultant’s Report Project Number: TA 7917 July 2013 Republic of Uzbekistan: Amu Bukhara Irrigation System Rehabilitation (Feasibility Study Volume 1 Supplemental Report) Prepared by Lahmeyer International in association with Info Capital Group For the Ministry of Agriculture and Water Resources This consultant’s report does not necessarily reflect the views of ADB or the Government concerned, and ADB and the Government cannot be held liable for its contents. (For project preparatory technical assistance: All the views expressed herein may not be incorporated into the proposed project’s design. Amu Bukhara Irrigation System Rehabilitation Feasibility Study – Supplemental Report Amu Bukhara Irrigation System Rehabilitation SUPPLEMENTAL REPORT Feasibility Study Prepared for the Asian Development Bank and the Ministry of Agriculture and Water Resources of the Republic of Uzbekistan (TA: 7917-UZB) 20 July 2013 Lahmeyer International in association with InfoCapital Group page i InfoCapital Group Amu Bukhara Irrigation System Rehabilitation Feasibility Study – Supplemental Report CURRENCY EQUIVALENTS (as of 2 July 2012) Currency Unit – Soum (UZS) UZS1.00 = $0.00048 $1.00 = UZS2096.19 ABBREVIATIONS ABIS – Amu Bukhara Irrigation System ABISOA – Amu Bukhara Irrigation System Operating Authority ADB – Asian Development Bank AES – agro-economic survey BISA – Basin Irrigation System Administration BVO – River Basin Water Management Organization CC – climate change CDM – Clean Development Mechanism CRU-WG – Climate Research Unit – Weather Generator DMI – domestic, municipal, and industrial EA – executing agency FAO – United Nations Food and Agriculture Organization GDP – gross domestic product GHG – greenhouse gas ha – hectare HGME – Hydrogeological Meliorative Expedition I&D – irrigation and drainage IE – irrigation efficiency IEE – initial environmental examination IPCC – Intergovernmental Panel on Climate Change IR – Inception Report ISA – Irrigation System Administration km – kilometer MAWR – Ministry of Agriculture and Water Resources MCA – Main Canal Administration MOU – Memorandum of Understanding MT million tonne O&M – operation and maintenance NGO – non-governmental organization POW – productivity of water PPTA – project preparatory technical assistance PSE&C – Pump Station, Energy and Communications RP – Resettlement Plan RRP – Report and Recommendations of the President SA – Social Assessment Lahmeyer International in association with InfoCapital Group page ii InfoCapital Group Amu Bukhara Irrigation System Rehabilitation Feasibility Study – Supplemental Report SCADA – supervisory control and data and acquisition SPS – Safeguard Policy Statement SRES – Special Report Emissions Scenarios TOR – terms of reference UNFCC – United Nations Framework Convention on Climate Change UZBS – Uzbek Soum (national currency) WUA – water users association GLOSSARY Bonitet Classification system for land productivity potential Dekhan Household plot used for households immediate food requirements and sale of surplus. Given to head of family for the livelong ownership. Size of dekhan farms: irrigated land 0.35 ha and 0.50 on non-irrigated area Glavgosecoexpertiza Main Directorate for State Ecological Expertise, or SEE Goskompriroda State Nature Protection Committee Khokim Province or District Governor Khokimiyat Local government authority Makhalla Collection of villages to create a community village Oblast Province (Russian version) Oblvodkhozy Province administration O’zuvnazorat Water inspectorate Rayon District (Russian version) Rayvodkhozy District administration Shirkat Cooperative farm, successor of former kolkhoz Turman District, smaller administrative unit of the viloyat Uzglavgidromet Chief Hydrometeorological Administration Viloyat Province administrative unit of Uzbekistan. Uzbekistan has 12 viloyats and 1 autonomous republic of Karakalpakstan Lahmeyer International in association with InfoCapital Group page iii InfoCapital Group Amu Bukhara Irrigation System Rehabilitation Feasibility Study – Supplemental Report CONTENTS I. SUMMARY ............................................................................................................................... 1 A. Background .......................................................................................................................... 1 B. Scope of Supplemental Design Works ................................................................................ 1 II. UPDATED DESIGN CRITERIA ............................................................................................... 2 A. Design Criteria ..................................................................................................................... 2 B. Design Capacity and Design Flow ....................................................................................... 3 1. Peak Flow (Historical Pump Records) ............................................................................. 3 2. Irrigation Water Requirements ......................................................................................... 5 III. KHAMZA NEW PUMP STATION DESIGN ............................................................................ 11 A. Location and Layout ........................................................................................................... 11 B. Pump House Mechanical Equipment ................................................................................. 13 1. Components ................................................................................................................... 13 2. Pump Units Design Criteria ............................................................................................ 14 3. Pump Characteristics and Layout .................................................................................. 18 4. Main and Maintenance Discharge Shut-Off Valves ....................................................... 22 5. Technical Water Supply System .................................................................................... 24 6. Pumphouse Overhead Crane ........................................................................................ 26 7. Oil Supply and Disposal System .................................................................................... 27 8. Drainage & Dewatering System ..................................................................................... 28 9. Emergency Dewatering System ..................................................................................... 31 10. Compressed Air System ................................................................................................ 32 11. Fire Fighting Equipment and Alarm System .................................................................. 33 12. Heating, Ventilation & Air Conditioning .......................................................................... 34 13. Mechanical Workshop Equipment ................................................................................. 34 14. Water Supply System ..................................................................................................... 35 C. Hydro-mechanical Equipment ............................................................................................ 35 1. Intake Trash Racks and Embedded Parts ..................................................................... 35 2. Intake Stoplogs and Embedded Parts ........................................................................... 37 3. Trash Rack Cleaning Machine ....................................................................................... 38 4. Intake Gantry Crane ....................................................................................................... 39 5. Discharge Pipe System .................................................................................................. 40 D. Electrical Equipment .......................................................................................................... 42 1. Pump Station Power Supply .......................................................................................... 42 2. Main Electrical Motors and Soft Starter (LCI) ................................................................ 44 3. 6 kV High Voltage System ............................................................................................. 45 4. Protection, Metering and Control Equipment ................................................................. 46 Lahmeyer International in association with InfoCapital Group page iv InfoCapital Group Amu Bukhara Irrigation System Rehabilitation Feasibility Study – Supplemental Report 5. Low Voltage (400V) AC Supplies ................................................................................... 47 6. 6 / 0.4 kV Power Transformer ........................................................................................ 48 7. DC-System and UPS ..................................................................................................... 48 8. Lighting ........................................................................................................................... 49 9. 400V/230 V System ....................................................................................................... 49 10. Grounding System ......................................................................................................... 50 11. Instrumentation and Control System .............................................................................