Quy Nhon Hydrology and Urban Development Flood Modeling Strategies for Urban Growth in Nhon Binh Ward
Program Locations: Vietnam: Quy Nhon, Nhon Binh Ward
Project Duration: December 2010–August 2013
Project Lead: Tuyen Nghiem, Technical Staff
Nhon Binh People’s Committee, Nhon Binh provincial government departments
Since the mid-1980s, Quy Nhon’s administrative boundaries have gradually spread into formerly rural farming areas historically impacted by seasonal floods, droughts, and ground water salinization. Nhon Binh is located in the estuary of the Ha Thanh and Kon Rivers and very close to the Thi Nai lagoon. The vulnerability assessments and climate modeling based on the 2009 flood indicated that Nhon Binh ward is one of the most severely impacted areas within the city of Quy Nhon. Residents of the ward report between 3 and 5 seasonal flood events per year with most floods rising and falling to a height of 20 to 30 centimeters within a 24-hour period. At the same time, Nhon Binh has also become a major focus for new urban development.
Core Program Activities
This project focused on identification and assessment of the impacts of alternative flood and inundation scenarios on planned urban development in Nhon Binh Ward, Quy Nhon, in the context of recent extreme storm events and potential climate change impacts.
Working together with all relevant departments of city government, the project:
Gathered and reviewed information on historic flooding in Nhon Binh ward during the 2009 storm event and assessed the impacts caused by and inflicted on new urban development.
Developed a hydrological model for the Kon and Ha Thanh River basin to assess both current conditions and the potential future impacts of climate change.
Assessed the potential impact of future floods and inundation on the urban plan of the Nhon Binh community.
Conducted shared learning activities to build knowledge, tools, and working relationships within the planning process to take climate change into account.
Assessed the Typhoon Mirinae flooding in comparison to past floods based on interviews with local residents.
Constructed a hydrologic model and validated results using historic flood information; simulated urban flooding under current and future climate and urban development scenarios.
Integrated results into city planning processes.
Michael di Gregorio, Consultant
QuyNhon Climate Change Coordination Office
Dr. To QuangToan, Southern Institute of Water Resources Research