THE EFFECT OF PAVING BLOCK SHAPE ON TIME OF CONCENTRATION AT VARIOUS SLOPE CONDITIONS (LABORATORY TEST WITH RAINFALL SIMULATOR)

• Main Author: ADITYA PRAMANA, WILLIAM
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/63042
• Institution: Institut Teknologi Bandung

Population growth accompanied by rapid development often results in many green open lands changing functions. This results in reduced water catchment areas which have an impact on changes in time of concentration in that area. This condition causes runoff water to flow quickly into the drainage channel. To reduce the rate of runoff due to impermeable surfaces, such as road surfaces, sidewalks (sidewalks), driveways, parking lots, and other places, paving blocks are used to reduce the runoff and extend the time of concentration. The scope of the research is to test the time of concentration using three shape of paving blocks by conducting laboratory tests using a rainfall simulator. The purpose of this study was to determine the effect of the physical shape of the paving block on the time of concentration (tc), and to determine the most efficient paving block geometry in reducing runoff under various slope conditions. Paving blocks used are rectangular paving blocks, hexagons, and grass blocks with variations in land slope of 0%, 5%, 10%, and 15%. The results showed that the hexagonal paving block produced the longest tc value, followed by rectangular paving blocks, and the shortest was the grass block. In addition, there is an inverse relationship between the time value of concentration and the slope of the land, where the larger the slope, the smaller the concentration time value. The application of paving blocks to the drainage design can also reduce the height of the water flow in the channel.