The study area consists of Chain Ferry which is situated in Seberang Perai Utara district, Penang. The study area is bounded by Sungai Perai on the south and east and Butterworth Air Force Base to the north which covers a total area of 244.6 ha.


The flood prone areas in Chain Ferry concentrated in the west of Federal Route 1 and its surrounding areas. Due to  rapid development and lack of improvement for the existing drainage infrastructure, parts of the study area is affected by high tide and flash flood. The flood duration is short and it usually occurs in the months of May and November. The flooding problems in  Chain Ferry are caused by the inadequacy of existing drainage system and tidal effect. Moreover, the level of construction platform is lower than the desirable platform levels.


The principal objectives of the study include the following:


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