Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/220319
Title: IMPACT OF SOIL AND WATER RETENTION CHARACTERISTICS ON GREEN ROOF THERMAL PERFORMANCE
Authors: CHUA HUI XUAN VALERIE
Keywords: Building
PFM
Project and Facilities Management
Wong Nyuk Hien
2015/2016 PFM
Issue Date: 28-Jun-2016
Citation: CHUA HUI XUAN VALERIE (2016-06-28). IMPACT OF SOIL AND WATER RETENTION CHARACTERISTICS ON GREEN ROOF THERMAL PERFORMANCE. ScholarBank@NUS Repository.
Abstract: Greenery brings about benefits to urban landscape through processes of shading and evapotranspiration. Rooftop greenery provides cooling in dense urban areas without exorbitant space requirements. Performance of rooftop greenery systems may vary according to organic components i.e. plant and soil type, and inorganic components i.e. planter box structure and irrigation strategy. This study's objective is to measure the resultant thermal impact due to soil and water variation on rooftop greenery. Nine green roof garden plots are set up on the rooftop of School of Design and Environment, on 2nd July to 3rd September 2015. Nine planter boxes are divided into three setups. Setup A comprises of planter box with proprietary lightweight soil. Setup B comprises of the same planter box with top-soil. Setup C incorporates a water retention reservoir at the bottom of the planter box with proprietary lightweight soil. Cyathula prostrata is used for all planter boxes. Surface temperature is measured at (i) mulch layer, (ii) soil directly above water retention layer, and (iii) below the planter box. Measurements are collected in three phases. In the first phase, irrigation is first conducted. In the second phase, irrigation is withheld to understand effectiveness of water retention reservoir, impact on plant growth and thermal performance. In the final phase, irrigation is restored. Results evidently illustrated the water retention layer's ability to reduce mulch level temperatures, but led to a slight temperature increase due to heat stored in water. Results provide insight into the effectiveness of water retention layer and soil types.
URI: https://scholarbank.nus.edu.sg/handle/10635/220319
Appears in Collections:Bachelor's Theses

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