Over the past two decades, Water Sensitive Urban Design (WSUD) has become an important part of the design of new developments and aims to minimise the effects of development on the natural water cycle. This is achieved, in part, by ensuring the stormwater runoff is treated to a sufficient standard to enable the effluent to be reused and/or released into receiving waters. Structural WSUD systems, or Stormwater Quality Improvement Devices (SQIDs), have seen increased use in South East Queensland to manage stormwater runoff. Design decisions for their use have often been based on performance data supplied by the manufacturers. However field evaluation studies have been limited and performance claims by manufacturers are often based solely on laboratory tests under ideal testing conditions. The objective of this project was to evaluate the stormwater pollution removal performance of two SQID field installations; - the Stormceptor gross pollutant trap (GPT) located at a commercial site in Nambour - the Humegard (GPT) located at the University of the Sunshine Coast campus Field evaluations were conducted for both these GPT systems, following the methodology recommended in Stormwater Australia’s ‘Stormwater Quality Improvement Devices Evaluation Protocol’ or SQIDEP. The GPT’s pollution removal performances of three main stormwater pollutants were tested, namely: Total Suspended Solids (TSS), Total Nitrogen (TN) and Total Phosphorous (TP).
Submitted in the fulfilment of the requirements of the degree of Bachelor of Engineering (Civil Engineering), University of the Sunshine Coast, 2015.