(Luận văn thạc sĩ) water conflicts related to management of multi purpose reservoirs in vu gia thu bon river basin

VIETNAM NATIONAL UNIVERSITY, HANOI VIETNAM JAPAN UNIVERSITY NGUYEN THI NHAT ANH WATER CONFLICTS RELATED TO MANAGEMENT OF MULTI-PURPOSE RESERVOIRS IN VU GIA - THU BON RIVER BASIN MASTER'S THESIS Hanoi, June 2019 VIETNAM NATIONAL UNIVERSITY, HANOI VIETNAM JAPAN UNIVERSITY NGUYEN THI NHAT ANH WATER CONFLICTS RELATED TO MANAGEMENT OF MULTI-PURPOSE RESERVOIRS IN VU GIA - THU BON RIVER BASIN RESEARCH SUPERVISOR: Prof SHIGETO NAKA Assoc Prof MASAKAZU FUKUZUMI Dr NGUYEN NGOC HUY Hanoi, June 2019 CONTENTS Acknowledgments iii Abstract iv List of Abbreviation v List of Tables vi List of Figures viii Introduction 1.1 General topic and research background 1.2 Research objectives 1.3 Research gap and research contribution 1.4 Research scope 1.5 Research methods and framework Conceptual framework and Literature review 2.1 Conceptual framework of Water conflict and Reservoir 2.1.1 Water conflict 2.1.2 Water conflict resolution 2.1.3 Reservoirs 2.2 Research on Water conflicts 10 2.2.1 Research on Water conflicts in Vietnamese river basin 10 2.2.2 Research on water allocation (to find payoff function) 13 2.3 Research on Vu Gia – Thu Bon River Basin 16 2.3.1 Research on VGTB RB related to social or environmental aspects 16 2.3.2 Research on VGTB RB about main water users in VGTB RB 17 Methodology 19 3.1 Theoretical approach 19 3.1.1 Game theory 19 3.1.2 Game theoretical approach can solve conflict 19 3.2 Game theory model 21 3.2.1 Game Tree 21 3.2.2 Profit functions 23 Current situation of water conflict 25 4.1 Context of Vu Gia – Thu Bon River Basin 25 i 4.1.1 Natural conditions 25 4.1.2 Social-economic conditions 26 4.2 Water resources (supply side) 26 4.3 Water consumption (demand side) 28 4.3.1 Hydropower 28 4.3.2 Irrigation 30 4.3.3 Urban water supply 31 4.4 Water balance 33 4.5 Water resource management in VGTB RB 35 4.5.1 Water resource management at basin level in Vietnam 35 4.5.2 Water resource management in VGTB RB 36 4.5.3 Management of reservoir system in VGTB RB 37 4.5.4 Procedure for operation of inter-reservoir system in VGTB RB 38 4.6 Water conflict related to multi-purpose reservoir system 40 Discussion and Policy Recommendation 44 5.1 Finding 44 5.1.1 Game theoretical analysis 44 5.1.2 Analysis of practical model 50 5.1.3 Analysis of modified model 62 5.2 Discussion 67 5.3 Policy recommendation 69 5.4 Limitation and Future research 70 Conclusion 72 Reference 73 Appendix A Data 80 A1 Irrigated water level for paddy 80 A2 Planted area and yield of paddy 81 A3 Scenarios on sharing water from H (based on Procedure 1537) 82 Appendix B Specific examples for Practical model 85 B1 Example 85 B2 Example 86 B3 Example 87 ii ACKNOWLEDGMENTS Conducting the research is a journey to discover yourself and to develop critical thinking On that journey, supervisors and companions are indispensable Firstly, I am particularly grateful for the assistance given by my supervisors for his valuable and constructive suggestions during the planning and development of this research work Assistance provided by Naka Shigeto Sensei, which gave me great inspiration and led me to the academic world, was greatly appreciated The knowledge I learned from Fukuzumi Masakazu Sensei in game theory gave me a great and attractive economic tool to build my original model Lastly, with his rich practical experience, Nguyen Ngoc Huy Sensei helped me understand a great deal more about the reality of the water sector in Vietnam In this journey, I was also fortunate to be instructed by lecturers at Vietnam Japan University and to be able to discuss with other researchers from VACI 2019 I would like to offer my special thanks to Mr Yoshifumi Hino in the MBA program, Mr Koshi Yoshida and Mr Makoto Tamura in the MCCD program helped me gain a lot of knowledge about water, hydropower and game theory In addition, I am grateful for the assistance given by Mr Dao Trong Tu for helping me to understand the water resource management Moreover, I would like to thank the MPP program and VJU for creating what I think is the most favorable academic environment Here, I had opportunities to discuss with my colleagues, who were always willing to listen to even the vaguest ideas of mine Finally, I would like to express my sincere thanks to my lovely family and my enthusiastic friends, without whose endless motivations and support this work would have been impossible iii ABSTRACT Water conflict is becoming an urgent problem over the world because of rapid economic development leading to the rapid increase of water demand, and global climate change to the decrease of water availability in season dry This study is about water conflict occurring in Vu Gia - Thu Bon river basin among three main water users: hydropower reservoirs in upstream as well as an irrigation system and urban water supply in downstream In order to understand deeply their interactions, this study builds a game theoretical model to describe the current conflict and their benefits in exploiting water From the general model, the practical model is calculated by secondary data and then is modified with water right weight and average values The initial results are that although the profitability for the whole agricultural sector is the largest, the average value is negligible In contrast, the profitability of hydropower and water supply companies is lower but more concentrated In the perspectives of policymakers, it is essential to analyse the movement of each player, consider the total payoff values and use control variables as “refund” and “punishment” to adjust some water user’s behaviors iv LIST OF ABBREVIATION Abbreviation Meaning HPP Hydropower Plant WTP Water Plant VGTB Vu Gia – Thu Bon RB River basin RBO River basin organization DAWACO Da Nang Water Supply Company NE Nash equilibrium SPNE Subgame perfect Nash equilibrium MONRE Ministry of Natural Resources and Environment MARD Ministry of Agriculture and Rural Development MOIT Ministry of Industry and Trade v LIST OF TABLES Table 3.1: Similarities of water conflict and game theory 20 Table 4.1: Water flow of dry season and flood season in VGTB RB 27 Table 4.2: Irrigation system of VGTB RB 31 Table 4.3: Capacity of main water plants of DAWACO 33 Table 4.4: Water supply-demand gap index of VGTB RB 34 Table 4.5: Water exploitation index of VGTB RB 34 Table 4.6: River basin organisations in VGTB RB 37 Table 4.7: Main documents for procedure for operation of inter-reservoir system in VGTB 39 Table 4.8: Changes in water resources of Vu Gia River 43 Table 5.1: Matrix of Sub-game in general model 44 Table 5.2: Matrix of Sub-game in general model 45 Table 5.3: Outcomes of VGTB game’s example model 48 Table 5.4: The basis to calculate M-value of H (hydropower plants) 51 Table 5.5: Profit of hydropower plants in VGTB game’s practical model 51 Table 5.6: The basis to calculate M-value of I (irrigation system) 53 Table 5.7: Profit of Irrigation in VGTB game’s practical model 53 Table 5.8: M-value of H, I and C 54 Table 5.9: Guaranteed value for water demand of downstream 55 Table 5.10: Total sharing water from three hydropower reservoirs in three scenarios 56 Table 5.11: Outcomes of VGTB game’s practical model 58 Table 5.12: Outcomes of VGTB game’s practical model (example) 58 vi Table 5.13: M-value of three players with water right weight (γ) based on average profit 62 Table 5.14: Outcomes of VGTB game’s modified model 64 Table 5.15: Outcomes of VGTB game’s modified model (example) 64 Table 5.16: Social payoff in general model, practical model and modified model (𝓥𝑺𝑾) 65 vii LIST OF FIGURES Figure 1.1: Research framework based on the demand side and supply side Figure 2.1: Four dimensions of resources scarcity Figure 3.1: Game tree with three players 21 Figure 5.1: Irrigation planning map of Quang Nam province 46 Figure 5.2: Game tree with dominant strategies and value of payoffs of general model 47 Figure 5.3: Game tree with dominant strategies and value of payoffs of practical model 57 Figure 5.4: Payoffs of C - Urban water supply in VGTB game’s practical model 59 Figure 5.5: Payoffs of I - Irrigation in VGTB game’s practical model 60 Figure 5.6: Payoffs of H - Hydropower in VGTB game’s practical model 60 Figure 5.7: Game tree with dominant strategies and value of payoffs of modified model 63 Figure 5.8: Total payoffs of three players in VGTB game’s practical model 66 Figure 5.9: Total payoffs of three players in VGTB game’s modified model 66 viii REFERENCE 2030 Water Resources Group (2017) Vietnam - Hydro-Economic Framework for Assessing Water Sector Challenges ADB, NARBO, & CRBOM (2011) Managing water in Asia’s river basins: Charting progress and facilitating investment - The Vu Gia-Thu Bon Basin ADB (2007) Song Bung Hydropower Project - Environmental Impact Assessment Report https://doi.org/10.1016/S0140-6736(07)60581-9 Branche, E (2015) Sharing the water uses of multipurpose hydropower reservoirs: the SHARE concept Chau, V N., Cassells, S., & Holland, J (2015) Economic impact upon agricultural production from extreme flood events in Quang Nam, central Vietnam Nat Hazards, (75), 1747–1765 https://doi.org/10.1007/s11069-014-1395-x CSRD, & RLS (2014) Technical report - Review of environmental impact assessment report of Dak Mi hydropower plant CSRD (2014a) Community Research Indigenous Knowledge about impacts on environment and life due to hydropower development Retrieved from https://issuu.com/csrd7/docs/tong_hop_nc_ttbd_thuy_dien_mien_tru CSRD (2014b) Hydropower in the Central and Central Highlands: residents' interest and responsibilities of stakeholders Retrieved from https://issuu.com/csrd7/docs/thuy_dien_mien_trung tay_nguyen-qu CSRD (2018) Escape the tight shirt: A Vuong Hydroelectric from a gender perspective Retrieved from https://issuu.com/csrd7/docs/b_o_c_o_gia_2018/18 Dan, N L., Ky, N Đ., & Lan, V T T (2012) Managing drought and desertification in the South Central region in the context of climate change Publisher of Natural Science and Technology Dinar, A., & Hogarth, M (2015) Game Theory and Water Resources - Critical Review of its Contributions, Progress and Remaining Challenges Foundations and Trends® in Microeconomics, 11(1–2), 1–139 https://doi.org/10.1561/0700000066 Dung, N T K (2018) Study on developing a methodology for identifying the minimum flows - Applying to the Vu Gia – Thu Bon river system Vietnam Academy for Water Resources 73 Duong, N T T (2015) Evaluating and forecasting environmental conflicts in exploiting and using surface water resources of Srepok river basin Vietnam National University, Hanoi - VNU Esfahani, M A., Kerachian, R., & Mortazavi-Naeini, M (2006) Conflict Resolution in Water Resources Allocation In 7th International Conference on Hydroinformatics (pp 21–29) Fran https://doi.org/10.1007/978-3-70912492-5_2 Firoz, A B M., Nauditt, A., Fink, M., & Ribbe, L (2018) Quantifying human impacts on hydrological drought using a combined modelling approach in a tropical river basin in central Vietnam Hydrology and Earth System Sciences, 22(1), 547–565 https://doi.org/10.5194/hess-22-547-2018 General Statistics Office of Vietnam (2016) Preliminary report on results of the rural, agricultural and fishery census in 2016 Statistics Publishing House Giang, N T., Huong, N T., Viet, N., Hung, T T., Ha, N N., Anh, T N., & Vinh, T N (2016) Assessing the changes in hydrological regime downstream of the Ba river basin under the impact of the reservoir system VNU Science Journal on Sciences of Earth and Environment, 32(2), 12–24 Giang, N T., Thao, H T., Vinh, T N., Binh, P D H., & Quan, V Đ (2017) Study on changes in sediment regime in the Ba river downstream under the impact of reservoir system VNU Science Journal on Sciences of Earth and Environment, 33(4), 127–134 https://doi.org/10.22144/ctu.jvn.2018.089 Government of Vietnam (2002) Decree No.91/2002/ND-CP prescribing the functions, tasks, powers and organisational structure of the Ministry of Natural Resources and Environment Government of Vietnam (2003) Decree No 143/2003/ND-CP of November 28, 2003, detailing the implementation of a number of articles of the ordinance on exploitation and protechtion of irrigation works Government of Vietnam (2008) Decree No 120/2008/ND-CP on River Basin Management Government of Vietnam (2012) Decree No 67/2012/ND-CP on modifying, supplementing a number of articles of Decree No 142/2003/ND-CP GWP, & INBO (2009) A Handbook for Integrated Water Resources Management in Basins https://doi.org/10.1016/j.quaint.2014.03.017 Hoi, N C., Tu, D T., & Hien, B T T (2015) Policy recommendations for Integrated Management of Vu Gia - Thu Bon river basin and the coast of Da Nang - Quang Nam, Vietnam 74 ICEM, & ADB (2008) A preliminary evaluation of the ecological attributes of the fish fauna of the Vu Gia - Thu Bon river system and its vulnerability to impacts from clustered hydropower development ICEM (2007) Pilot Strategic Environmental Assessment in the Hydropower Subsector, Vietnam Final Report: Biodiversity Impacts of the hydropower components of the 6th Power Development Plan ICEM (2008) Strategic Environmental Assessment of the Quang Nam Province Hydropower Plan for the Vu Gia-Thu Bon River Basin IEA (2017) Valuing Hydropower Services: The Economic Value of Energy and Water Management Services provided by Hydropower Projects with Storage Retrieved from https://www.ieahydro.org/media/54b38044/IEA Hydro Annex IX_Summary Report_Final Draft_Nov_2017.pdf Institute of Water Resources Planning (IWARP) (2017) Irrigation Planning of Quang Nam Province to 2025 and orientation to 2050 - Synthesis Report Retrieved from http://pctt.quangnam.vn/index.php/van-ban/118-quy-hoach-phat-trianthay-lai-tanh-quang-nam-an-n-m-2025-va-anh-h-ang-an-n-m-2030 Islam, Z (2011) Literature Review on Water Resources Management Modeling https://doi.org/10.13140/2.1.3496.0168 Jhawar, S., Agarwaal, S., Oberoi, T., Sharma, T., & Thakkar, A (2018) Application of game theory in water management International Journal of Advance Research and Development, 3(10) JICA, TEDI, OCG, & PCKK (2018) Data Collection Survey on Basin-based Comprehensive Sediment Management in River Systems of the Central Region in Vietnam JICA (2016) Preparatory Survey for Da Nang City Hoa Lien Water Supply Project (PPP Infrastructure Project) Khoi, D N (2013) Assessing the impact of climate change on changes in flows in the Srepok river basin Journal of Earth Sciences, 35, 281–288 Le, P T (2017) Research and evaluate water resources in Srepok river basin for sustainable socio-economic development Vietnam Academy of Science and Technology Libiszewski, S (1992) What is an Environmental Conflict? In Meeting of Environment and Conflicts Project (ENCOP) (pp 1–15) Zürich Lieu, N T (2017) Research and assess the impact of climate change on agricultural production in Quang Nam province Graduate University of Science and Technology https://doi.org/10.22144/ctu.jsi.2016.105 75 Madani, K (2010) Game theory and water resources Journal of Hydrology, 381(3– 4), 225–238 https://doi.org/10.1016/j.jhydrol.2009.11.045 Ministry of Finance (2013) Circular 41/2013/TT-BTC guiding Decree 67/2012/NDCP amending Decree 143/2003/ND-CP guiding the Ordinance on Exploitation and Protection of Irrigation Works Ministry of Industry (2003) Decision No 875/QD-KHDT in 2003 approving the hydropower ladder planning of Vu Gia - Thu Bon river system MONRE (2012) Decision No 341/QD-BTNMT in 2012 on List of intra-provincial river basins My, P T D., & Hanh, N Q (2018) Hydropower impacts: From Environmental, Social and Gender Perspectives Thuan Hoa Publishing House Retrieved from https://issuu.com/csrd7/docs/csrd_2018_hydropower_impacts_vietna National Assembly (1998) Law No 08/1998/QH10 on on water resources National Assembly (2002) Resolution No 02/2002/QH11 to establish the Ministry of Natural Resources and Environment National Assembly (2012) Law No 17/2012/QH13 on water resources Nepal, S., Flügel, W.-A., & Shrestha, A B (2014) Upstream-downstream linkages of hydrological processes in the Himalayan region Ecological Processes, 3(19), 1–16 Retrieved from https://ecologicalprocesses.springeropen.com/articles/10.1186/s13717-0140019-4 Nga, N T T (2017) Research to set up the hydrological and economic model for optimal water allocation in the Ba river basin Thuy loi university Nguyen-Tien, V., Elliott, R J R., & Strobl, E A (2018) Hydropower generation, flood control and dam cascades: A national assessment for Vietnam Journal of Hydrology, 560, 109–126 https://doi.org/10.1016/j.jhydrol.2018.02.063 OECD, & IEA (2012) Technology Roadmap Hydropower https://doi.org/10.1016/j.egypro.2012.03.019 PanNature (2011) Organisation of river basin management in Vietnam - Power and challenges Parrachino, I., Zara, S., & Patrone, F (2006) Cooperative Game Theory and its Application to Natural, Environmental, and Water Resource Issues: Application to Water Resources SSRN ELibrary, (WPS4074), 1–46 Retrieved from http://ssrn.com/paper=946831 Pedroso, R., Tran, D H., Thi, M H N., Le, A Van, Ribbe, L., Dang, K T., & Le, K P (2017) Cropping systems in the Vu Gia Thu Bon river basin, Central 76 Vietnam: On farmers’ stubborn persistence in predominantly cultivating rice NJAS - Wageningen Journal of Life Sciences, 80, 1–13 https://doi.org/10.1016/j.njas.2016.11.001 Prime Minister of Vietnam (2000) Decision No 67/2000/QD-TTg on the establishment of the National Council on water resources Prime Minister of Vietnam (2006) Decision No 81/2006/QD-TTg approving the national strategy on water resources to 2020 Prime Minister of Vietnam (2007) Decision No 110/2007/QD-TTg approving the National Power Development Plan for the period 2006-2015 with consideration to 2025 Prime Minister of Vietnam (2010) Decision No 1880/QD-TTg in 2010 on procedures for operating inter-reservoirs among A Vuong, Dak Mi Song Tranh in flood season Prime Minister of Vietnam (2010) Decision No 1989/QD-TTg in 2010 on List of inter-provincial river basins Prime Minister of Vietnam (2011) Decision No 1208/QĐ-TTg on the National Power Development Plan for the period 2011-2020 with consideration to 2030 on 21/7/2011 Prime Minister of Vietnam (2014) Decision No 909/QD-TTg in 2014 on procedures for operating inter-reservoirs in Vu Gia - Thu Bon River Basin in flood season Prime Minister of Vietnam (2015) Decision No 1537/QD-TTg in 2015 on procedures for operating inter-reservoirs in Vu Gia - Thu Bon River Basin Quang Nam Provincial People's Committee (2010) Decision No 2056/QD-UBND of 2010 approving the Small and Medium Hydropower Plan in Quang Nam Province Ringler, C., & Nguyen Vu, H (2004) Water Allocation Policies for the Dong Nai River Basin in Vietnam: An Integrated Perspective Environment and Production Technology Division Discussion Paper Retrieved from http://dx.doi.org/10.2139/ssrn.644441 Tam, V T., Hung, D T., & Le, T T (2012) Analysing the water resource system and proposing solutions to rationally allocate water resources in the Ba river basin Journal of Earth Sciences, 34(1), 54–64 Trung, N Q., & Lam, N X (2015) Impact of regulating reservoir to low flow regime downstream Vu Gia - Thu Bon Journal of Irrigation Science and Technology, (28), 1–10 77 Tuan, H N., & Hung, M V (2016) Research on the general use of water sources in dams to serve the socio-economic development strategy of Da Nang city in context of climate change and sea level rise Journal of Irrigation Science and Technology, (33) Tuan, H N., & Thuan, T P (2015) Assessment of surface water resources in Da Nang city considering climate change conditions, socio-economic development and proposing orientations for water exploitation and use until 2050 In Workshop on Advanced Technology in Civil Engineering Towards Sustainable Development Tuan, L A., & Nga, D T V (2016) Hydropower development in Vietnam: Challenges and solutions Center for Water Resources Conservation and Development Tuan, L A., Tu, D T., Vinh, D N., My, P T D., & Suu, L T T (2014) Operation of flood discharge and water storage of hydropower reservoirs to the downstream of Vu Gia - Thu Bon river system: From simulation data to reflect the reality of the people Tuan, N D., Dung, L H., & Sy, N V (2015) Characteristics of Ba river basin in reservoir operation and assessment of cumulative environment Journal of Hydraulic and Environmental Science, 49(6) Ty, P H (2015) Dilemmas of hydropower development in Vietnam: between daminduced displacement and sustainable development Universiteit Utrecht UNDP, & GreenID (2013) Analysis of environmental and social costs and risks of hydropower dams, with a case study of Song Tranh Hydropower Plant UNDP (2008) Conflict Resolution and Negotiation Skills for Integrated Water Resources Management UNFCCC (2006a) Clean development mechanism project design document (CDMPDD) of Dak Mi Hydropower Plant Project 4970: Dak Mi Hydropower Project Retrieved from https://cdm.unfccc.int/Projects/DB/SQS1309870743.56/view UNFCCC (2006b) Clean development mechanism project design document (CDMPDD) of Song Bung Hydropower Plant Project 6919: Song Bung Hydropower Project Viet, H C (2011) Vietnam rice industry: Strategic vision before opportunities and challenges In Scientific workshop of Vietnam rice industry Can Tho Viet, T Q., Tran, D H., Le, K P., Dang, K T., Le, A Van, & Pedroso, R (2018) Technical efficiency of rice production in the delta of the Vu Gia Thu Bon river 78 basin, Central Vietnam World Development Perspectives, 9(April 2017), 18– 26 https://doi.org/10.1016/j.wdp.2017.12.001 WCD (2000) Dams and Development: A New Framework for Decision-Making Retrieved from http://www.cap-net.org/documents/2000/09/criteria-andguidelines-for-good-practice-on-dams.pdf World Bank (2009) Strategic environmental assessment of the hydropower master plan in the context of the power development plan VI https://doi.org/10.1016/s0169-8141(08)00187-x 79 APPENDIX A DATA A1 Irrigated water level for paddy (P=85%) (unit: m3/ha) Upstream of Vu Gia river Upstream of Thu Bon river Downstream of Vu Gia - Thu WS crop 582 1216 1631 790 SA crop WS crop 10 11 12 0 1169 0 1047 0 1249 2132 1973 1857 1717 0 0 2759 1797 1754 1096 48 591 1255 1716 992 SA crop 2297 1073 1975 1739 129 WS crop 1157 1223 1997 1226 SA crop 0 0 Bon river basin Source: (Viện Quy hoạch Thủy Lợi, 2017) Note: WS crop: Winter-spring crop; SA crop: Summer-autumn crop 0 A2 Planted area and yield of paddy Nam Giang Winter-spring crop Summerautumn crop Planted area of paddy (ha) Yield of paddy (ton) Planted area of paddy (ha) Yield of paddy (ton) Upstream of Vu Gia river Phuoc Son Tây Giang Đông Giang 378 493 460 425 4,301 1501 2021 1,327 1,594 26,890 2047 915 994 1,370 4,300 3683 2258 2,300 3,325 26,064 Upstream of Thu Bon river Hiep Duc Que Son Winter-spring crop Summerautumn crop Planted area of paddy (ha) Yield of paddy (ton) Planted area of paddy (ha) Yield of paddy (ton) Source: QSO 2017 Đại Lộc Downstream of VGTB RB Duy Xuyên Điện Bàn TP Hội An 1310 3783 3658.6 5644.12 374.2 7162 20693 22713 35005 2414 984 3082 3796.2 5657.04 345.2 5182 16737 22343 30213 2071 A3 Scenarios on sharing water from H (based on Procedure 1537) Scenario 1: HAN < 2.67m Month 12.5 12.5 12.5 12.5 12.5 12.5 25 25 12.5 12.5 12.5 Hours (h) 24 24 24 24 24 24 24 24 24 24 24 Flow (m3/s) 22 22 22 22 18 18 30 30 28 28 28 Hours (h) 24 12 12 12 12 12 12 12 12 12 12 Flow (m3/s) 35 40 40 40 35 35 55 55 40 40 40 Hours (h) 24 12 12 12 12 12 12 12 12 12 12 186 105 116.5 124.55 124.55 Dry season Flow (m3/s) Dak Mi A Vuong Song Bung WS crop (106 m3) SA crop (106 m3) 105.0 156.2 138.6 Source: summary from Procedure 1537 The period of increased water use: Article 16.1a (Dak Mi 4), Article 16.2a (A Vuong), Article 16.3a (Song Bung 4) The period of normal water use: Article 17.1a (Dak Mi 4), Article 17.2a (A Vuong), Article 17.3a (Song Bung 4) Scenario 2: 2.67m < HAN < 2.8m Month Flow (m3/s) 8 8 8 12.5 12.5 8 Hours (h) 24 24 24 24 24 24 24 24 24 24 24 Flow (m3/s) 18 18 18 18 15 15 25 25 24 24 24 Hours (h) 24 12 12 12 12 12 12 12 12 12 12 Flow (m3/s) 30 25 25 25 23 23 43 43 28 28 28 Hours (h) 24 12 12 12 12 12 12 12 12 12 12 150 71.4 79 91 91 Dry season Dak Mi A Vuong Song Bung WS crop (106 m3) SA crop (106 m3) 72.2 107.7 98.9 Source: Summary from Procedure 1537 The period of increased water use: Article 16.1a (Dak Mi 4), Article 16.2b (A Vuong), Article 16.3b (Song Bung 4) The period of normal water use: Article 17.1a (Dak Mi 4), Article 17.2b (A Vuong), Article 17.3b (Song Bung 4) Scenario 3: HAN > 2.8m Month Dry season Flow (m3/s) Dak Mi (only) Hours (h) WS crop (10 m ) SA crop (106 m3) 3 24 8.0 24 7.3 24 8.0 24 24 24 24 24 24 24 24 7.8 11.7 9.5 8.0 8.0 Source: summary from Procedure 1537 The period of increased water use: Article 16.1a (Dak Mi 4), Article 16.2c (A Vuong), Article 16.3c (Song Bung 4) The period of normal water use: Article 17.1a (Dak Mi 4), Article 17.2c (A Vuong), Article 17.3c (Song Bung 4)  In case the water level at Ai Nghia hydrological station is greater than 2.8 m, based on the current water level of the reservoir and the flow's forecast in average 10-day to decide the proper operation of the reservoir This article is applicable to A Vuong and Song Bung reservoirs Note Flood season, from September to December 15 The period of increased water use in dry season, from May 11 to June 10 The period of normal water use in dry season, for the rest of the year APPENDIX B SPECIFIC EXAMPLES FOR PRACTICAL MODEL B1 Example Assumptions ′ 𝜎𝐶𝐼 = 50%𝑝𝐻−𝑀 µ′𝐶𝐼 = 50%𝑝𝐻−𝑀 ′ ′ 𝜎𝐶/𝐼 = 𝜎𝐶/𝐼 = 1/2 × 𝜎𝐶𝐼 µ𝐶/𝐼 = µ′𝐶/𝐼 = 1/2 × µ′𝐶𝐼 Value of variables Value ′ 𝜎𝐶𝐼 𝜎𝐶 = 𝜎𝐶′ 𝜎𝐼 = 𝜎𝐼′ µ′𝐶𝐼 µ𝐶 = µ′𝐶 µ𝐼 = µ′𝐼 173 86.5 86.5 173 86.5 86.5 Value of outcome table 𝒱𝐻 𝒱𝐶 𝒱𝐼 O1 173 73.5 822.5 O2 86.5 73.5 909 O3 86.5 160 822.5 O4 160 909 O5 346 0 O6 259.5 86.5 O7 259.5 86.5 O8 173 86.5 86.5 B2 Example Assumptions ′ 𝜎𝐶𝐼 = 40%𝑝𝐻−𝑀 µ′𝐶𝐼 = 61%𝑝𝐻−𝑀 ′ ′ 𝜎𝐶/𝐼 = 𝜎𝐶/𝐼 = 1/2 × à/ = à/ = 1/2 ì Value of variables Value ′ 𝜎𝐶𝐼 𝜎𝐶 = 𝜎𝐶′ 𝜎𝐼 = 𝜎𝐼′ µ′𝐶𝐼 µ𝐶 = µ′𝐶 µ𝐼 = µ′𝐼 138.4 69.2 69.2 211.06 105.53 105.53 Value of outcome table O1 O2 O3 O4 O5 O6 O7 O8 𝒱𝐻 𝒱𝐶 𝒱𝐼 138.4 90.8 839.8 69.2 90.8 909 69.2 160 839.8 160 909 346 0 240.47 105.53 240.47 105.53 134.94 105.53 105.53 B3 Example Assumptions ′ 𝜎𝐶𝐼 = 61%𝑝𝐻−𝑀 µ′𝐶𝐼 = 40%𝑝𝐻−𝑀 ′ ′ 𝜎𝐶/𝐼 = 𝜎𝐶/𝐼 = 1/2 × 𝜎𝐶𝐼 µ𝐶/𝐼 = µ′𝐶/𝐼 = 1/2 × µ′𝐶𝐼 Value of variables Value ′ 𝜎𝐶𝐼 𝜎𝐶 = 𝜎𝐶′ 𝜎𝐼 = 𝜎𝐼′ µ′𝐶𝐼 µ𝐶 = µ′𝐶 µ𝐼 = µ′𝐼 138.4 69.2 69.2 211.06 105.53 105.53 Value of outcome table O1 O2 O3 O4 O5 O6 O7 O8 𝓥𝑯 211.06 105.53 105.53 346 276.8 276.8 207.6 𝓥𝑪 54.47 54.47 160 160 0 69.2 69.2 𝓥𝑰 803.47 909 803.47 909 69.2 69.2 ... topic of this study is ? ?Water conflicts related to management of multipurpose reservoirs in Vu Gia - Thu Bon River Basin? ?? 1.2 Research objectives Water conflicts have been occurring on most river. .. UNIVERSITY NGUYEN THI NHAT ANH WATER CONFLICTS RELATED TO MANAGEMENT OF MULTI- PURPOSE RESERVOIRS IN VU GIA - THU BON RIVER BASIN RESEARCH SUPERVISOR: Prof SHIGETO NAKA Assoc Prof MASAKAZU FUKUZUMI Dr... draining quickly into the basin and leading to a poor capacity to hold water in the basin as well as in the riverbed Therefore, the capability to regulate water at the basin level is low as river