Technical Notes: Computational Model for Housing Drainage System Case Study: Kharismatama Permai Housing in Padang

Abstract

This study is about the development of a computational model, which is capable of simulating flows flowing through roadside gutters in a housing drainage system with a very mild-slope land in a steady state condition. The governing equation of the model is the world-widely used uniform flow formulation by Manning. The equation is solved using the Newton-Raphson method. The resulting model is then applied to simulation of gutter flows flowing across a drainage system of Kharismatama Permai housing in Padang, which is frequently overflowed by the rainfall excess. The rate of rainfall intensity was measured manually at the same time the flood occurred at the considered housing complex. Types of gutter materials were observed to determine the coefficients of gutter roughness, and types of land covers also were observed to determine the run-off coefficients. By adjusting the gutter slopes and varying the flow directions, the drainage system can flow the rainfall excess without overflowing.

Keywords

• rainfall
• gutter
• flow
• slope
• flow direction
• model