Historical flooding in Lembah Sungai Rambai and its surrounding in year 1999 to 2009 has been long issue in Seberang Perai Tengah area. Report from the Seberang Perai Municipal Council (MPSP) stated that the flooding caused in this area is the inability of the local internal drains and river system to carry the increased discharge resulting from the rapid development in the area and the non-availability of an integrated drainage plan in the area.
There are two common approaches to solve the flood problem which is the structural and non-structural measure. The solution that has been made by the council in Lembah Sungai Rambai was the structural measure which is by widening and deepening the drainage inventory system, resizing and realignment of internal drain, channel improvement, bunding of river channel and pumping on that area. For non-structural measure, the council only did a town planning in controlling the development, flood forecasting and the flood plan management. However, for non-structural approaches, there is a tools such as the computer model can be used to quantify the effect of human interference to the river system. The system is already available in advanced country but the application is still new in this country.
GIS has been used throughout the project from the planning in management of the infrastructure. GIS applications in flood risk mapping is one of the non-structural approaches that can be used in controlling the development and flooding on the Lembah Sungai Rambai.
2.1. OBJECTIVE OF THE STUDY 2.2. STUDY AREA
The study area covers Taman Seri Rambai, Taman Makok, Taman Desa Damai, Taman Sungai Rambai, Taman Sri Jaya, Taman Padang Lallang, Taman Mutiara and its surrounding. The study area is approximately 343 ha and drained by two parallel channels – Sungai Rambai and Parit 4. Sungai Rambai has two main upstream tributaries and discharges into Sungai Juru through a tidal gate at Juru