PENGARUH INTENSITAS DAN DURASI HUJAN TERHADAP TINGGI GENANGAN (PONDING) PADA RAIN GARDEN DI KAWASAN TERBANGUN

• Main Author: Mediayati, Yuniki
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/33990
• Institution: Institut Teknologi Bandung

Changes in land use and development have changed the balance of the hydrological cycle. Infrastructure development has changed the porous soil become impervious. Hence, the volume of runoff be increased. Early efforts are required to accomplish these issues. Rain garden is one of the technologies that offered by Low Impact Development (LID), this technology purposes to manage water runoff and change conventional paradox of storm water management. Rain garden is a concave area with plants on the surface and there is a layer filter underneath. This technology undertake to hold back runoff, infiltrate storm water, and percolate to pass through the filter media. This study is focused to determine the hydraulic performance of rain garden without underdrain system in Bandung Institute of Technology campus (ITB). Method of determining the hydraulic performance is performed by observing the characteristics of ponding on the surface of the rain garden. This reaserch will find out the effect of rainfall intensity, duration of rain, and the water content in the soil on the incidence of ponding. Based on 30 rain events during the rain garden test periode, is obtained with a pool of 20 events and 10 events without ponding on the surface of the rain garden. Ponding is used to occur when high rainfall intensity and long duration. It was found that the rain garden can cut 100% run off from the roof, even during high intensity occurs ponding