Inherent uncertainties are the main matter of constrain and concern for any fool proof urban flood management programme. Selection of better retrofitting options to tackle uncertainties involves the process of evaluating the technical and financial feasibility of wide range of options. In this paper, we present a case study of a catchment in Ho Chi Minh City, Vietnam, where we apply evolutionary methods to search for optimal retrofitting opportunities to cope with uncertainties. Flexible options such as detention storage at nodes and provision of sustainable urban drainage systems have been identified. The optimal storage volumes for detention storage at the nodes and optimal coverage areas for sustainable drainage options to prevent flooding in Nhieu Loc – Thi Nghe basin have been arrived at by integrating optimization techniques and a storm water management model. This case study demonstrates and paves the way for considering combined hydraulic modelling along with optimization approach as the first step towards incorporating flexibility into urban drainage systems.


Republished in part with permission from   Radhakrishnan, M., Quang, C. N. X., Pathirana, A., Phi, H. L., Quan, N. H. and Ashley, R. (2014). Retrofitting urban drainage capacity to cope with change: A case study for Nhieu Loc – Thi Nghe Basin change in Ho Chi Minh city. In: 13th International Conference on Urban Drainage, 7-14 September, Sarawak, Malaysia.

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Last updated: 6th Apr 2017