Hydrology model of extensive green roof

Liew, Ke-Bo (2006) Hydrology model of extensive green roof. Masters thesis, Universiti Malaysia Sarawak (UNIMAS).

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Abstract

Storm water runoff in urbanised watershed such as roof top is fast flowing and overloading urban drainage system over time, causing flash flood. One of the source controls for this fast run off is installation of extensive green roof to the existing concrete flat roo~~Green roof is a close mimic of a natural watershed and has the effect of slowing storm water runoff in comparison with a conventional concrete flat roof. This dissertation relates the green roof runoff response to control system in order to understand the delay response of an extensive green roof in comparison with a conventional concrete flat roofyThe averaged time delay for the runoff to reach peak value (99.33 percents) between the conventional concrete roof and the green roof are 244.4 seconds and 252.05 seconds respectively for the 1 to 60 slope configuration and the 1 to 200 slope configuration. The pulse responses for respective controlled volume models were simulated. The simulated results using the estimated time constant were then compared with respective average data acquired from each experimental setup using sum of squared of error. The first order control system response more closely represents the concrete roof than the green roof where the normalised sum of squares of errors (SSE) for the concrete (~ roofs and the green roof are less then 1 and 2 respectively. Finall~~s dissertation suggests a theoretical relation the time constant to a hydrology parameter as an example for further possible application of the finding ofthis dissertation.

Item Type: E-Thesis (Masters)
Additional Information: Thesis (M.Sc.) - Universiti Malaysia Sarawak , 2006.
Uncontrolled Keywords: Watershed hydrology, Watersheds, Storm water runoff, concrete flat roof, flash flood, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, Postgraduate, research, Universiti Malaysia Sarawak.
Subjects: G Geography. Anthropology. Recreation > GB Physical geography
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Gani
Date Deposited: 18 Nov 2019 08:51
Last Modified: 18 Nov 2019 08:51
URI: http://ir.unimas.my/id/eprint/27916

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