FIELD INVESTIGATION ON THE PERFORMANCE OF STREET INLETS

Street inlets, also known as storm water inlets, are provided to intercept rainwater runoff from the roads. These inlets are part of the drainage system. The nature of roads in Malaysia where there is too much surface runoff leads to urban flooding. With urbanization, there are more concrete structures and thus less rainwater infiltrates into the ground. This research is aimed to identify several existing street inlets in Malaysia with case studies carried out within the area in Universti Teknologi PETRONAS, and also to determine the efficiency of the selected street inlets by means of field investigation. A collection tank to simulate rainfall is used to measure and analyze the efficiency of the street inlets. Based on field investigation, street inlets with the addition of deflectors have proven to improve performance and efficiency of the inlet in intercepting surface runoff.