Thailand - Northeast Thailand Irrigation Improvement Project

FILE COPY DOCUMENT OF INTERNATIONAL BANK FOR RECONSTRUCTION AND DEVELOPMENT INTERNATIONAL DEVELOPMENT ASSOCIATION Not For Public Use Report No. 226-TH APPRAISAL OF THE NORTHEAST THAILAND IRRIGATION IMPROVEMENT PROJECT THAILAND January 15, 1974 Irrigation and Area Development Division II Projects Department Asia Region This report was prepared for official use only by the Bank Group. It may not be published, quoted or cited without Bank Group authorization. The Bank Group does not accept responsibility for the accuracy or completeness of the report.  CURRENCY EQUIVALENTS US$1.00 = Baht (0)20.0 $l = us$0.05 US$1.00 million = $20.,000,000 th million = us$50,0oo WEIGHTS AND MEASURES (METRIC SYSTEM) 1 hectare (ha) 2.47 acres - 6.25 rai 1 kilometer (km) = 0.62 miles 1 meter (m) = 3.28 feet 1 million cubic meters (mcm) = 810 acre feet 1 ton = 1,000 kg = 2,205 pounds ABBREVIATIONS RID Royal Irrigation Department BAAC = Bank for Agriculture and Agricultural Cooperatives RD1, RD3 High-Yielding Rice Varieties  THAILAND APPRAISAL OF THE NORTHEAST THAILAND IRRIGATION IMPROVEMENT PROJECT TABLE OF CONTENTS Page No. SUMMARY AND CONCLUSIONS i - iii I. INTRODUCTION 1 II. BACKGROUND .......of..O.2 General .....O.**... .....0..#2 The Agriculture Sector ............... .. 2 Northeast Thailand..... ***.........*.e 3 Agriculture in Northeast Thailand 3 III. THE PROJECT AREAS ...*. .................. 5 A. Irrigation Improveenat Project . .5 General ..... . . 5 Existing Irrigation Facilities . .. 5 Climate...... ' .6) Water Supply, Demands and Quality ................ 7 Topography, Land Use and Soils . .7 Farm Size and Land Tenure .... 00 .......... 8 Crops and Crop Production .. 8 Transportation and Marketing . . 9 B. Rainfed Rice Pioneer Project .................... 9 General ...................................... 9 Existing Rice Stations ....................... 9 IV. THE PROJECT ..................................... 10 A. Irrigation Iprovement Project . ........... 10 General ..... .. 10 Project Works .... ...... ... 0. .... ....... 11 Engineering Designs ..... * .... ......1.......... 14 Cost Fstimates .....h........... 1 Environmental Impact of the Project .............. 16  -2- Page No. B. Rainfed Rice Pioneer Project ..... ............. 16 General ...................................... 16 Project Components ................. ........... 17 Cost Estimates ................................ 18 C. Preparation of Rural Infrastructure Project .... 19 D. Financing and Procurement ..*..............**... 19 Financing ........................... . .......... 19 Procurement ...................................... 19 Disbursements .................. I................ . 20 Accounts and Audits ....... ....................... 20 V. ORGANIZATION AND MANA2ENENT .............. .......... 21 A. IrrigationImproveme