Stormwater Drainage Impact of Impervious Structures on Surrounding Soil

Abstract

Data collection and data processing play a crucial role on storm water management. Meanwhile, pluvial floods have an increasing trend in the Mediterranean Region. Although climate change has altered flood events and their magnitude, anthropogenic impacts on flood recurrency and the associated damage cannot be ignored. Appropriate design of storm water infrastructure mostly depends on the existing hydrological data. In this study, the designing stage of a prototype storm water infrastructure together with the required data collection were explained. As a case study, the surrounding area of the indoor sports hall of Antalya Bilim University Turkey, has been investigated due to historical water accumulations in this area during the intense precipitation events. To this end, field infiltration tests and surveying studies were conducted across the target area. A 25-year design storm having the duration of 10 minutes has been used to estimate design runoff using the Storm Water Management Model (SWMM). The design criteria of the structure has been determined according to code of storm water design from the Environment and Urban Ministry of Turkey. The experimental results showed the recession coefficient of 0.647 for the surrounding soil profile. Maximum velocities and flow depths of the model output have shown that the existing drainage infrastructure isn’t sufficient to handle design storm water events.