Analisa Efektivitas Pipa Resapan Horizontal Terhadap Zero Delta Q di Kampus Universitas Semarang 19 20

Abstrak

Increased construction of buildings and infrastructure in the Semarang University campus environment has led to an increase in the area of impervious land, resulting in a significant increase in rainwater runoff. This study aims to analyze the effectiveness of the Horizontal Infiltration Pipe (HIP) system in reducing the delta Q value and assessing its ability to achieve Zero Delta Q conditions, where all rainwater can be absorbed back into the ground without causing runoff. The research method was carried out by calculating and comparing runoff discharge before and after construction and analyzing infiltration discharge through the PRH system. The analysis results showed that in the second year, the effectiveness of PRH only reached 36.2%, indicating that the system was not yet optimal in absorbing water. After modifications were made in the form of adjusting the size of the outlet holes and equalizing the flow distribution from 22 gutter points, the effectiveness of the system increased significantly with a ΔQ value of 101%. This value indicates that all rainwater has been successfully infiltrated into the ground and the PRH system has achieved and even exceeded the Zero Delta Q condition. Thus, the application of PRH has proven to be effective as a solution for water conservation and runoff control on campus.