Student research results - Evaluating green roof panels

Today I want to highlight another of our graduates, namely Daniel Moreno, who I supervised on his studies to evaluate green roof panels for rainwater retention capacity. 

You can download the thesis from the repository here: https://essay.utwente.nl/104498/

Abstract:

"Amidst escalating climate change and urban population growth, urban water infrastructures face unprecedented pressures. Green roof panels, as an innovative solution, have been developed to mitigate these impacts and enhance urban livability. This study aimed to evaluate the performance of extensive green roof panels in managing rainwater, particularly focusing on their capabilities in water retention, evapotranspiration, and water quality enhancement. Utilizing both a literature review and laboratory experiments, the effectiveness of these panels was assessed in controlled conditions. The results demonstrated that the panels absorbed an average of 81% of a simulated heavy rainfall (2.8mm/h), with evapotranspiration rates ranging from 12 to 16.8 ml/h. Moreover, water quality analysis post-filtration revealed a decrease in pH and a notable increase in turbidity, along with a slight rise in nitrite levels following the initial runoff. These findings suggest that green roof panels possess considerable potential for reducing peak rainfall impacts and mitigating urban flooding. However, given the discrepancies between laboratory conditions and real-world settings, there is a pressing need for further field testing and continuous monitoring. This would help substantiate and optimize the use of green roof panels for sustainable urban water management, aligning with broader environmental goals and enhancing urban quality of life."

Together with experts from the Waterlab, Daniel set up a protocol to test the retention capacity of the green panels. He also calculated how long it would take for each type of substrate to return to its former dry weight, as well as what type of compounds could be filtered by the substrates. This is an important addition to current literature, as there is little research done on the absorption and return to dry weight of the substrates of  recycled clothing and rockwool with vegetation. 

Student research results - factors influencing Dutch residents' acceptance of green retrofitting practices

Today I want to highlight the research of one of our graduated students I co-supervised with Laura Franco-Garcia at the BMS faculty. Ali has examined the Factors Influencing Dutch Residents’ Acceptance of Green Retrofitting Practices in Residential Buildings.

You can download it from the utwente repository here: https://essay.utwente.nl/102539/

Abstract: 

"The study explores the increasing energy consumption and environmental challenges, with the construction sector being a significant contributor. Green retrofitting (GR) is identified as a key solution to improve the energy efficiency of residential buildings. Focusing on the Netherlands, particularly Utrecht, the research aims to understand the key drivers and barriers influencing the adoption of GR practices among Dutch residents. Through policy analysis and interviews with local residents, the study finds that financial incentives and environmental benefits are the primary motivators for GR adoption. However, despite various subsidies and loans, challenges in implementation remain. The study concludes with recommendations to enhance adoption rates, emphasizing the need for local authorities' intervention and applying the principles of the Diffusion of Innovations Theory."

By interviewing actual homeowners, Ali discovered what they consider to be green retrofitting measures within their own homes, and what barriers are most often encountered. It's very worthwhile to read this thesis and learn more about implementing these measures in practice.