The Effect of Lake Beseka Discharge on Irrigation Water Quality of Awash River Belayneh Yirdaw Kelemu A Thesis Submitted to the department of Water Resources Engineering, School of Civil Engineering and Architecture Presented in Partial Fulfillment of the Requirement for the Degree of Master in Water Resources Engineering (Specialization in Irrigation Engineering) Office of Graduate Studies Adama Science and Technology University Adama April, 2018 The Effect of Lake Beseka Discharge on Irrigation Water Quality of Awash River Belayneh Yirdaw Major Advisor:- Dr.Boja Mekonnen (Ph.D) Co-Advisor:- Dr. Rogelio Belleza Paguntalan (Professor) A Thesis Submitted to the department of Water Resources Engineering, School of Civil Engineering and Architecture Presented in Partial Fulfillment of the Requirement for the Degree of Master in Water Resources Engineering (Specialization in Irrigation Engineering) Office of Graduate Studies Adama Science and Technology University Adama April, 2018 Approval of Board of Examiners We, the undersigned, members of the Board of Examiners of the final open defense by Belayneh Yirdaw Kelemu have read and evaluated his/her thesis entitled “The Effect of Lake Beseka Discharge on Irrigation Water Quality of Awash River ” and examined the candidate. This is, therefore, to certify that the thesis has been accepted in partial fulfillment of the requirements for the Degree of Master’s in Irrigation Engineering. Boja Mekonnen (Dr.) ___________________ ___________________ Advisor Signature Date Mengistu Sime (Dr.) _____________________ ___________________ Chairperson Signature Date Zelalem Biru (Dr.) _____________________ ___________________ Internal Examiner Signature Date Kassa Tadele (Dr.Ing.) __________________ __________________ External Examiner Signature Date i Declaration I hereby declare that this MSc Thesis is my original work and has not been presented for a degree in any other university, and all sources of material used for this thesis have been duly acknowledged. Name: Belayneh Yirdaw Signature:_______________________ This M.Sc Thisis has been submitted for examination with our approval as thesis advisors Name: Dr.Boja Mekonnen (Ph.D) Signature:____________________ Name: Dr. Rogelio Belleza Paguntalan (professor) Signature:_____________________ Date of submission _________________ ii Advisors approval sheet To: Water Resources Engineering Programme Subject: Thesis Submission This is to certify that the thesis entitled “The Effect of Lake Beseka Dischrge on Irrigation Water Quality of Awash River “submitted in partial fulfillment of the requirements for the degree of Master of Science in Irrigation Engineering, and has been carried out by Belayneh Yirdaw , ID.No GSR/5924 /06 -, under my/our supervision. Therefore, I/we recommend that the student has fulfilled the requirements and hence hereby he/she can submit the thesis to the program. Dr.Boja Mekonnen (Ph.D) _________________________ _________________ Major Advisor Signature Date Dr. Rogelio Belleza Paguntalan _________________________ ____________ (Professor) Co-Advisor Signature Date iii Dedication I dedicate this thesis manuscript to my wife Bogalech Jima , and to my family. iv Biographical Sketch The author was born in Goha-Tsion (W/Jarso), Dec 15, 1975 G.C. He attended his primary and secondary school in Goha-Tsion between the years 1981 to 1995 G.C. Then he completed his high school education in 1994 G.C He joined Awassa College of Agriculture in 1995 G.C and graduated with Diploma in Agricultural Engineering and Mechanization in 1996 G.C. After graduation, the author worked at different woreda of North shoa zone, Oromia Region as Soil and Conservation Expert, November 1999 G.C to September 2012 G.C. In addition to the above he joined Haramaya University in 2005 G.C and graduate with BS.c in Natural Resource Management in 2009 G.C. From October 2012 G.C up to now he was working in Awash Basin Authority as Basin planning, Monitoring and Evaluation Director. He joined the School of Graduate Studies of the Adama Science and Technology University in the academic year 2014 G.C as a graduate student of the Master of Science degree program in Irrigation Engineering. v Acknowledgment First of all, I praise God, for guiding me throughout the course of this study. I would like to express my heartfelt and warmest gratitude to Dr.Boja Mekonnen and Professor Rogelio Belleza Paguntalan, for spending their precious time in commenting and advising me from the start to the end of this study. I would like to appreciate the staff of Awash Basin Authority, especially Mr.Getachew Gizaw, Director General of AwBA for initiating and supporting what I need for this study; Water Quality case team leader Ms.Konjit Mersha for providing data and information, which really helped me in analyzing physical and chemical characteristics of the water in the area . I never forget to appreciate Bogalech (my wife) and Kalkidan (my daughter), who never complained when I use their time for this study. vi List of Acronyms AwBA Awash Basin Authority Do Dissolved oxygen EC Electrical Conductivity FAO Food and Agriculture Organization l liter mg milligram MoWIE Ministry of Water, Irrigation & Electricity pH Concentrator of Hydrogen Ions SAR Sodium Absorption Ratio TDS Total Dissolved solids Temp. Temperature vii Table of Contents Approval of Board of Examiners ..................................................................................................... i Declaration ...................................................................................................................................... ii Advisors approval sheet ................................................................................................................. iii Dedication ...................................................................................................................................... iv Biographical Sketch ........................................................................................................................ v Acknowledgment ........................................................................................................................... vi List of Acronyms .......................................................................................................................... vii Table of Contents ......................................................................................................................... viii List of Tables .................................................................................................................................. x List of Figures ................................................................................................................................ xi List of Appendix Form.................................................................................................................. xii List of Appendix Table ................................................................................................................ xiii Abstract ........................................................................................................................................ xiv 1. INTRODUCTION ...................................................................................................................... 1 1.1 Background ........................................................................................................................... 1 1.2 Statements of the Problem..................................................................................................... 4 1.3 Objectives of the Study ......................................................................................................... 5 1.3.1 General objective ............................................................................................................ 5 1.3.2 Specific objectives .......................................................................................................... 5 1.4 Research Questions ............................................................................................................... 6 2. LITERATURE REVIEW ........................................................................................................... 7 2.1 Hydrological System of Lake Beseka and Its Impact ......................................................... 7 2.3 Irrigation water Quality ......................................................................................................... 9 2.4 Water Quality Criteria and Standards ................................................................................. 12 2.5 The Role of plant nutrient in plant growth .......................................................................... 14 2.6 Conflict on Water Resource ................................................................................................ 19 viii 3 MATERIALS AND METHODS ............................................................................................... 22 3.1 Description of the Study Area ............................................................................................. 22 3.2 Sampling Sites Location and Selection ............................................................................... 25 3.3 Mix Ratios Used in the Study ........................................................................................... 28 3.4 Equipment used in the study ..............................................................................................