Improvement of a drainage system for flood management with assessment of the potential effects of climate change [Amélioration des systèmes de drainage pour la gestion des crues, avec évaluation de l'effet de différents scénarios de changement climatique]
Journal
Hydrological Sciences Journal
Journal Volume
58
Journal Issue
8
Pages
1581-1597
Date Issued
2013
Author(s)
Abstract
Runoff discharge in the Tuku lowlands, Taiwan, has increased with land development. Frequent floods caused by extreme weather conditions have resulted in considerable economic and social losses in recent years. Currently, numerous infrastructures have been built in the lowland areas that are prone to inundation; the measures and solutions for flood mitigation focus mainly on engineering aspects. Public participation in the development of principles for future flood management has helped both stakeholders and engineers. An integrated drainage-inundation model, combining a drainage flow model with a two-dimensional overland-flow inundation model is used to evaluate the flood management approaches with damage loss estimation. The proposed approaches include increasing drainage capacity, using fishponds as retention ponds, constructing pumping stations, and building flood diversion culverts. To assess the effects on the drainage system of projected increase of rainfall due to climate change, for each approach simulations were performed to obtain potential inundation extent and depth in terms of damage losses. The results demonstrate the importance of assessing the impacts of climate change for implementing appropriate flood management approaches. © 2013 IAHS Press.
Runoff discharge in the Tuku lowlands, Taiwan, has increased with land development. Frequent floods caused by extreme weather conditions have resulted in considerable economic and social losses in recent years. Currently, numerous infrastructures have been built in the lowland areas that are prone to inundation; the measures and solutions for flood mitigation focus mainly on engineering aspects. Public participation in the development of principles for future flood management has helped both stakeholders and engineers. An integrated drainage-inundation model, combining a drainage flow model with a two-dimensional overland-flow inundation model is used to evaluate the flood management approaches with damage loss estimation. The proposed approaches include increasing drainage capacity, using fishponds as retention ponds, constructing pumping stations, and building flood diversion culverts. To assess the effects on the drainage system of projected increase of rainfall due to climate change, for each approach simulations were performed to obtain potential inundation extent and depth in terms of damage losses. The results demonstrate the importance of assessing the impacts of climate change for implementing appropriate flood management approaches.
Subjects
climate change; drainage; flood management; inundation; public participation
Other Subjects
Drainage capacity; Engineering aspects; Extreme weather conditions; Flood management; inundation; Inundation modeling; Potential effects; Public participation; Drainage capacity; Engineering aspects; Extreme weather conditions; Flood management; inundation; Inundation modeling; Public participation; Two-dimensional overland flows; Climate change; Drainage; Fish ponds; Flood control; Drainage; Fish ponds; Flood control; Floods; Floods; Climate change; climate change; climate effect; discharge; drainage network; flood control; local participation; overland flow; participatory approach; runoff; assessment method; climate change; climate effect; discharge; drainage network; flood control; local participation; overland flow; runoff; stakeholder; Taiwan; Taiwan
Type
journal article