analysis of technical options for network extension in Hai Phong City Vu Manh Hoang creator Perret, Sylvain Roger Chairperson Babel, Mukand Singh Examination Committee Sutat Weesakul Examination committee Jourdain, Damien Examination committee Germany Government (DAAD) Scholarship donor text th Pathum Thani Asian Institute of Technology 2012 monographic eng 98 leaves : ill., charts HaiPhongcity, Viet Namis currently facing the challenge of extension due to demographic growth, rapid economic development and urbanization process. In this context, water supply system has to quickly adapt, expand coverage, and increase efficiency.The goal of this research is to document and support adaptations and improvements in HaiPhong One Member Water Supply Company, Ltd. (HPWSCo). The objective is twofold. It first proposes to assess HaiPhong{u2019}s water supply system through performance analysis and a benchmarking approach based upon Data Envelopment Analysis (DEA) and that involves other cities of Vietnam. Second, the research assesses options for water distribution expansion in case study areas (Duong Kinh district and Do Son district), using hydraulic modeling with EPANET platform.DEAwas used for assessing technical efficiency of water supply systems in a comparative manner. DEA is a form of non-parametriclinear programming technique, which assesses technical efficiency of input/output processing units (decision making units -DMUs), highlights discrepancies between units, and areas for potential improvement. The performances of HPWSCo and other 9 cities in the same group of capacity are evaluated and utility rankings established. Two DEA-based approached have been performed: synchronic efficiency analysis, leading to benchmarking HPWSCo against 9 other cities of similar water supply capacity in Viet Nam in 2009; and diachronic efficiency analysis, leading to benchmarking HPWSCo in 2010 against past HPWSCo performances (from 2000 to 2009).Results show that HPWSCo{u2019}s performance in ranks 5thout of 10 cities, with ample room for improvements.It is because of 2 most important variables which impact to DEA results (Cost recovery ratio and Water tariff) of Hai Phong only have value in average range compare to other cities. It also proves that we need more detailed input data to make DEA based benchmarking more efficient. Diachronic analysis shows the changing performance efficiency of HPWSCo over 11 years; the period can bedivided in 3 sub-periods: before 2001, from 2002 to 2005, and from 2006 until 2010. These results are corresponding to the status and strategy of HPWSCo in each time periods. The performances of HPWSCo tend to improve over time.Moreover, it showed that the results are affected by inflation in 2 cases: Firstly, inflation is too high (over 20%). Secondly, inflation has minus value.The processes to develop Water Distribution System (WDS) are determined by setting up a hydraulic modeling for selected extension area (Duong Kinh district and Do Son district) with EPANET 2.0 tool. Firstly, it is very important to finding and choosing the water resource which provides water for study area. The next process is designing 2WDS alternatives. Lastly, bycomparing the results of EPANET hydraulic models, it shows that alternative 1 need less 12000 meters of 600 mm diameter pipes and more 3414 meters of 400 mm diameter pipesthan alternative 2. At the same time, it requires 9 meters pump head higher than alternative 2. In conclusion, the alternative 1 is defined as the better solution for extension in Duong Kinh and Do Son districts of Hai Phong city.It provides insights and recommendations for HPWSCoto establishing sound and timely extension strategy A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Engineering inWater Engineering and Management Thesis (M. Eng.) - Asian Institute of Technology, 2012 Water-supply Vietnam Hai Phong Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B04352 http://203.159.5.9/ait-thesis/detail.php?q=B04352 140618 20260817162413.0