Implementation of bioretention system for environmental-based urban drainage planning

Abstract

Drainage design patterns need improvements in an effort to find the root of the problems of flooding that often occur in big cities in Indonesia. The use of land that is not in accordance with applicable regulations makes drainage planning in a developing city will experience many difficulties. Rainwater management in particular is an effort to improve the existing drainage pattern. With the system, it temporarily absorbs rainwater into the ground with the application of bioretention. Drainage with the concept of environmentally sound makes it not just to drain water, but gives the optimum time for water to be able to absorb into the soil (Infiltration). Aiming at reducing the drainage load, filtering pollutants carried by rainwater into the soil, minimizing surface runoff and reducing annual runoff, the most important is groundwater recharge. Development of a bioretence system can be done in a Green Open Space that is adjusted to its designation, it can also be built on housing with easy calculations and can be applied at a cost that is not too expensive. The aim of this research is how a small artificial bioretention facility treating roof runoff from single family homes and nature bioretention overcome surface runoff from street and parking lot.