EVALUATING FUTURE WATER QUALITY OF URBAN RIVERS IN HANOI UNDER EFFECT OF URBANIZATION AND CLIMATE CHANGE - THE APPLICATION OF WEAP MODEL FOR CAU BAY RIVER
Keywords:urban river water quality, WEAP model, climate change, Hanoi water drainage development master plan.
Every day, up to 750,000 cubic meters of wastewater in Hanoi metropolitan areas is discharged directly into rivers and lake, of which only 10% is treated to the Vietnamese standards. According to the water drainage development master plan for the capital city of Hanoi until 2030, the government aim at dealing with flooding and improve environmental sanitation for local residents. With respect to the baseline and Master plan implementation scenarios, this study evaluates the future water quality of urban rivers in Hanoi under the effect of urbanization and climate change using Water Evaluation And Planning tool (WEAP) and take the Cau Bay catchment as the case study. The result shows that, without implementation of wastewater treatment plant, the water quality of Cau Bay River will be worse with the DO in dry season is 0.2-1.2 mg/l and BOD is 52.0-55.0 mg/l. With the implementation of Master plan, the level of DO and BOD would be 7.1-7.3 mg/l and 7.0-13.8 mg/l respectively in the dry season whereas the values are 3.7 mgO/l and 36.1-41.8 mg/l in the wet season. The degradation of wastewater during the wet season is results from the combine- overflow sewage system as designed in the master plan.
Thủ Tướng Chính Phủ - Quyết định số 725/QĐ-TTg phê duyệt Quy hoạch thoát nước Thủ đô Hà Nội đến năm 2030, tầm nhình đến năm 2050. (2013). The Prime Minister - The Decision number 75/QD-TTg on the Approval of Master plan on Hanoi Capital’s drainage through 2030 with a vision toward 2050.
Stave, Krystyna A., - A system dynamics model to facilitate public understanding of water management options in Las Vegas, Nevada, Journal of Environmental Management 67 (4) (2003) 303-313.
Yates, David, Purkey, David, Sieber, Jack, Huber-Lee, Annette, Galbraith, Hector -. WEAP21- a demand-, priority-, and preference-driven water planning model, Water Int. 30 (4) (2005) 501-512.
Demertzi, Κ.А., Papamichail, D.М., Georgiou, P.Е., Karamouzis, D.N., Aschonitis, V.G.- Assessment of rural and highly seasonal tourist activity plus drought effects on reservoir operation in a semi-arid region of Greece using the WEAP model, Water Int. 39 (1) (2014) 23-34.
Huber-Lee, A., Purkey, D.R., Sieber, J., Swartz, C., Young, C. - Sustainable water supply planning for three US cities: contrasts in climates and stakeholder issues, Stockholm Water Symposium, Stockholm, 2004, 16- 20.
Groves, D.G., Yates, D., Tebaldi, C.- Developing and applying uncertain global climate change projections for regional water management planning, Water Resour. Res. 44 (2008).
Purkey, D.R., Joyce, B., Vicuna, S., Hanemann, M.W., Dale, L.L., Yates, D., Dracup, J.A. - Robust analysis of future climate change impacts on water for agriculture and other sectors: a case study in the Sacramento Valley, Clim. Change 87 (S1) (2008) 109-122.
Yates, David, Purkey, David, Sieber, Jack, Huber-Lee, Annette, Galbraith, Hector, West, Jordan, Herrod-Julius, Susan, Young, Chuck, Joyce, Brian, Rayej, Mohammad - Climate driven water resources model of the Sacramento basin, California, J. Water Resour. Plan. Manag. 135 (5) (2009) 303-313.
Huber-Lee, A., Swartz, C., Sieber, J., Goldstein, J., Purkey, D., Young, C., Soderstrom, E., Henderson, J., Raucher, R.- Decision Support System for Sustainable Water Supply Planning, Awwa Research Foundation, Denver, 2006.
Purkey, D.R., Huber-Lee, A., Yates, D.N., Hanemann, M., Herrod-Julius, S.- Integrating a climate change assessment tool into stakeholder-driven water management decision-making processes in California, Water Resour. Manag. 21 (1) (2007) 315-329.
Varela-Ortega, C., Esteve, P., Bharwani, S., Downing, T.E.- Public policies for groundwater conservation: a vulnerability analysis in irrigation agriculture, CAIWA 2007 International Conference on Adaptive & Integrated Water Management, Basel, 2007.
Jingjing Gao, Per Christensen, Wei Li - Application of the WEAP model in strategic environmental assessment: Experiences from a case study in an arid/semi-arid area in China, Journal of Environmental Management 198 (1) (2017) 363-371.
Authors who publish with Vietnam Journal of Science and Technology agree with the following terms:
- The manuscript is not under consideration for publication elsewhere. When a manuscript is accepted for publication, the author agrees to automatic transfer of the copyright to the editorial office.
- The manuscript should not be published elsewhere in any language without the consent of the copyright holders. Authors have the right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of their work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are encouraged to post their work online (e.g., in institutional repositories or on their websites) prior to or during the submission process, as it can lead to productive exchanges or/and greater number of citation to the to-be-published work (See The Effect of Open Access).