Water Resources Management in Pyanj River Basin (TAJ 47181) Supplementary Document 18 Preliminary Asset Management and Operation and Maintenance Plan of Chubek Irrigation System September 2016 TAJ: Water Resources Management in Pyanj River Basin Project In preparing any country program or strategy, financing any project, or by making any designation of or reference to a particular territory or geographic area in this document, the Asian Development Bank does not intend to make any judgments as to the legal or other status of any territory or area. CONTENTS I. INTRODUCTION ........................................................................................................ 1 II. CIS SERVICE AREA .................................................................................................. 1 III. CLIMATE .................................................................................................................... 2 IV. WATER RESOURCES ............................................................................................... 3 A. Source of Water .................................................................................................... 3 B. Quality of Water Records ...................................................................................... 4 C. Water Diverted to Chubek Irrigation System ......................................................... 5 V. CHUBEK IRRIGATION SYSTEM ASSET (MAIN AND GRAVITY IRRIGATION) ........ 6 A. Present Asset and Condition................................................................................. 6 B. Expected Improved Asset After Project ................................................................. 9 VI. CHUBEK IRRIGATION SYSTEM ASSET (PUMP IRRIGATION) ...............................36 A. Present Asset and Condition............................................................................... 36 B. Expected Asset and Condition After Project ........................................................ 41 VII. PRESENT CIS O&M STRUCTURE ...........................................................................47 VIII. PRESENT CIS O&M EXPENDITURES .....................................................................51 A. Formats, Budget Items, and Expenditure Monitoring .......................................... 52 B. Salary Expenditures ............................................................................................ 54 C. Payments for Electricity Consumption ................................................................. 54 D. Irrigation Service Fees and Operation and Maintenance Expenditure ................. 54 IX. RATIONAL STRATEGY FOR EXECUTION OF SYSTEM MAINTENANCE ...............55 A. Causes Leading to Maintenance and Defining Severity Categories .................... 56 B. Agricultural Calendar and Execution of Maintenance .......................................... 58 C. Infrastructure and Maintenance Execution Volumes ........................................... 58 D. Using Expenditures for Performance Monitoring ................................................. 59 E. Other Constraints Affecting Rational System Operation and Maintenance .......... 60 X. PLAN FOR A SUSTAINABLE O&M SYSTEM............................................................64 A. Estimated O&M Expanses for Sediment Handling .............................................. 64 B. Pumped Irrigation Systems Operations and Maintenance Costs ......................... 65 C. Total O&M Costs under the With- and Without-Project Scenarios ....................... 65 D. Proposed Strategy for Financing O&M Costs ...................................................... 66 i LIST OF TABLES Table 1: Area Served by Pump and Gravity Irrigation – Design Conditions ........................... 1 Table 2: Area Served by Pump and Gravity Irrigation – Existing Situation ............................. 2 Table 3: Climatic Data of Chubek Irrigation System ............................................................... 2 Table 4: Pyanj River Discharge ............................................................................................. 3 Table 5: Mean Monthly Diversions to Chubek Canal Relative to Pyanj River Discharge ........ 5 Table 6: History of Diversion to Chubek Irrigation System, ‘000 m3 ....................................... 5 Table 7: Inventory of Inter-farm Canals ................................................................................. 6 Table 8: Inventory of Inter-farm Canals of the Hamadoni District ........................................... 7 Table 9: Inventory of Inter-farm Canals of the Farkhor District ............................................... 8 Table 10: Inventory of Inter-farm Canals of Vose District ....................................................... 9 Table 11: Estimated Cost of Climate Proofing of Irrigation Distribution Network Asset .........10 Table 12: Earth Work and Sediment Removal for Modernization of Main Canal ...................10 Table 13: Details of Quantities of Materials and Cost of Main Chubek Canal Structures Modernization and Associated Works ...................................................................13 Table 14: Detail of Quantities of Material and Cost of Electrification for Modernization of the Chubek Main Canal ..............................................................................................16 Table 15: Equipment for Removing Sediments from the Basin .............................................19 Table 16: Earth Work and Sediment Removal for Modernization of Inter-Farm Canals ........20 Table 17: Details of Quantities of Materials and Cost of Structures Modernization and Associated Works in Hamadoni District ................................................................23 Table 18: Details of Quantities of Materials and Cost of Structures Modernization and Associated Works in Farkhor District ....................................................................28 Table 19: Details of Quantities of Materials and Cost of Structures Modernization and Associated Works in Vose District ........................................................................31 Table 20: Details of Quantities of Materials and Cost of Structures Modernization and Associated Works in Kulob District .......................................................................33 Table 21: Cost of Concrete Lining of On-Farm Canals .........................................................35 Table 22: Earth Work for Cleaning of Drains .......................................................................36 Table 23: Pumping Stations in the Project Area ....................................................................37 Table 24: Present condition of Pumps in the Pumping Stations ............................................40 Table 25: District wise Summary of Pumping Systems .........................................................41 Table 26: Priority Order for the Groups of Pumping Stations ................................................42 Table 27: List of Recommended New Pumps and Motor sets ...............................................43 Table 28: List of Modernization of Suction and Discharge Piping and Valves .......................43 Table 29: List of Recommended Over Head Cranes and Material Handling Devices ............44 Table 30: List of Recommended Modernization of Ventilation System ..................................44 ii Table 31: List of Recommended Modernization of Instrumentation.......................................44 Table 32: List of Recommended Modernization of Electrical System ....................................45 Table 33: List of Recommended Modernization of Pump House Buildings and Provision of Associated Facilities .............................................................................................45 Table 34: List of Sketches and Diagrams .............................................................................46 Table 35: Water Users’ Associations in the Project Area ......................................................49 Table 36: Unit Area O&M Expenditure in 2003 .....................................................................52 Table 37: Latest Unit Area O&M Expenditure in the Key District of CIS ................................53 Table 38: Salary Expenditure in CIS Districts (% of O&M Expenditure) ................................54 Table 39: Electricity Consumption in Vose District of CIS .....................................................54 Table 40: Irrigation Service Fees and WUA Service Charges ...............................................54 Table 41: Irrigation Service Fee Collection in the Project Area .............................................55 Table 42: Operation and Maintenance Expenses for 2014 ...................................................55 Table 43: Principal Activities and Periods for Execution of Maintenance ..............................58 Table 44: Annual Sediment Handling Costs Under Various Project Scenarios .....................64 Table 45: Average Cost of Pumping Under the With-Project Scenario .................................65 Table 46: Estimated Total O&M Costs ..................................................................................66 Table 47: O&M Assessment of CIS (Current vs Target) .......................................................68 Table 48: Detailed O&M Expenditures in 2003 in project scheme and district areas (TJS) ...71 Table 49: Farkhor District LRI (FarkhorVodKhoz) .................................................................72