A LIFE CYCLECOSTS (LCC) ASSESSMENT OF SUSTAINABLE URBAN DRAINAGE SYSTEM FACILITIES
Lariyah Mohd Sidek, Kaoru Takara, Aminudin AB. Ghani, Nor Azizi Zakaria, Rozi Abdullah, Mohd Nor Mohd Desa
Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional (UNITEN)
Disaster Prevention Research Institute, Kyoto University
River Engineering & Urban Drainage Research Centre (REDAC),Universiti Sains Malaysia
School of Civil Engineering, Universiti Sains Malaysia
Humid Tropics Centre (HTC) Kuala Lumpur
Stormwater management practice has evolved from simple removal of runoff using traditional storm drainage and “end of pipe” approaches to comprehensive management approaches employing control measures which are more sustainable ecological solutions. In response to the needs for paradigm shift the way the stormwater is managed, the Malaysian Government has introduced a new approach of planning and design of urban areas through the New Stormwater Management Manual for Malaysia (MSMA) that offers a sustainable solution for integrating the land development and urban water cycle. Bio-Ecological Drainage System (BIOECODS) is an example of an innovative sustainable urban drainage system suggested in MSMA that designed to restore the natural environment. The BIOECODS combines three engineering techniques to manage stormwater based on “Control-at-Source” approach namely infiltration, storege, conveyance, and treatment by integrating the drainage components (i.e. ecological swales, on-line sub-surface detentions, and dry ponds) with the ecological pond components (i.e. detention pond, constructed wetlend, wading stream and recreational pond). In combination, this increase runoff lags time, increase opportunities for pollutant removal through settling and bio-filtration, and reduce the rate and volume of runoff through enhanced infiltration opportunities.