Adapting water resource management in coastal areas A case study in Hai Phong, Vietnam

Transcription

1 Adapting water resource management in coastal areas A case study in Hai Phong, Vietnam Thuc Phan, James Smart, Samantha Capon, Wade Hadwen Australian Rivers Institute, Griffith University

2 Presentation outline 1. Background 2. Existing water resource management challenges 3. Research objectives and modeling approach

3 Background

4 1.9 Population (million person) Population density (person/km2)

5 Thousands ha 6 Agriclutural land Forestry land Water surface area for aquaculture Specially used land Residential land Unused land

6 Existing water management challenges Water resource and complex hydrodynamics Strongly dependent on upstream rivers and the tidal regime, In dry seasons and high tides, back stream flows are occurred, making salinity intrusion into the river system Significantly difficult for water extraction

7 .3 Annual average salinity at upstream of Da Do River % (%) Annual average salinity at downstream of Da Do River

8 Climate change impacts 125 km of coastlines, The elevation is relatively low, about m above sea level, Significantly affected by climate change. 15 Annual average sea level rise (cm) 1 5 cm Hundreds mm Total amount of annual average rainfall

9 24.5 Annual average temperature Celsius degree Annual average humidity Mb

10 Water pollution Untreated or inappropriately treated waste water from residential areas and industrial zones release directly to river systems, Most of parameters are higher than VN standard level Thousands (MPN/ 1ml) Trung Trang Cau Vang Coliform Nguyet Ang Cong Vo Nui Doi Co Tieu Feb 3 April 2.5 June 2 Aug 1.5 Oct 1 Dec.5 Standar d (mg/l) Trung Trang Cau Vang Nguyet Ang Amoniac Cong Vo Nui Doi Co Tieu Feb April June Aug Oct Dec Standar d

11 (μg/l) Trung Trang Pesticide (DDT) Rainy season Dry season Standard Cau Vang Nguyet Ang Cong Vo Nui Doi Co Tieu (μg/l) Trung Trang Pesticide (Adrin) Rainy season Dry season Standard Cau Vang Nguyet Ang Cong Vo Nui Doi Co Tieu (mg/l) Trung Trang Cau Vang Phenol Nguyet Ang Cong Vo Nui Doi Co Tieu Feb April June Aug Oct Dec Standard Trung Trang Cau Vang Pb (mg/l) Nguyet Ang Cong Vo Nui Doi Co Tieu Feb April June Aug Oct

12 Research Objectives & modeling approach This study aims at identifying the current and future interrelationships between water availability from a freshwater river system and the growing water demands from industry, agriculture and urban sectors in the context of climate change and water pollution, A coupled system dynamics and Decision Bayesian networks approach is applied as an effective methodology to understand these interrelationships and to initiate the most plausible options for adaptation actions for Hai Phong city.

13 Climate change generation sub-model Sea level rise sub-model Water quality & river flow sub-model Participatory adaptation options Water Supply and Demand System Model Validation & Calibration Time slide results (215, 23, 25, 21) Decision Support System Population sub-model Economic data Optimization & sensitivity analysis Most cost-effective and plausible adaptation actions

14 Acknowledgements Special thanks go to Griffith University for funding this PhD program. Deep gratitude goes to Hai Phong Statistic Department, Hai Phong Centre for Environmental Monitoring, Hai Phong Centre for Land Use Management, Northeast Meteorological and Weather Stations, and Hai Phong Water Supply Company, An Hai Irrigation System Management Company, Thuy Nguyen Irrigation System Management Company, Da Do Irrigation System Management Company for their supports and providing data. Thank you for your attention!