DESIGN OF DRAINAGE SYSTEM, WATER SUPPLY, AND FLOOD ANALYSIS FOR A RENTAL OFFICE BUILDING WITH A BIOPHILIC APPROACH IN SURABAYA

• Main Author: Bagas Amareksa, Haryo
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/75234
• Institution: Institut Teknologi Bandung

Office rental buildings with a biophilic approach are designed to enhance worker productivity by creating a building ecosystem that mimics nature and provides a comfortable environment for building occupants. In the design of such a building, it is necessary to analyze rainfall to prevent runoff within the building and near its drainage channels. Additionally, the rainfall is also designed to be treated and utilized to fulfill the building's water needs. The design process involves analyzing rainfall data and the topography of Surabaya City, as well as conducting hydrological analysis to obtain processed rainfall data that will serve as the basis for drainage design, flood analysis, and water supply analysis. The scope of the drainage system design and analysis includes the layout and dimensional design of drainage channels on the building's roof and ground floor. The drainage system design takes into account the building's land use and its catchment area. U-ditches and vertical pipes are used for the design of the drainage channels. Flood analysis is conducted using HEC-RAS software and the rational method for flood hydrograph analysis. The analysis results, with a 10-year return period, indicate that there is no water overflow or runoff that affects the office building. The clean water supply for the building comes from two sources: treated rainwater and the public water utility (PDAM). An analysis of water demand and availability is conducted to design the water storage facilities. The designed water storage facilities include a Ground Water Tank, Reservoir, Rain Water Tank, and Roof Tank.