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Evaluation on flow discharge of grassed swale in lowland area

Mustaffa, Nurhazirah and Ahmad, Noor Aliza and Mohammad Razi, Mohd Adib (2017) Evaluation on flow discharge of grassed swale in lowland area. MATEC Web of Conferences, 103 (04017). pp. 1-8. ISSN 2261236X

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Abstract

Grassed swale is an open vegetated channel designed specifically in attenuating stormwater runoff to decrease the velocity, to reduce the peak flows, and minimize the causes of flood. Therefore, the fundamental of this study is to evaluate the flow discharge of swale in Universiti Tun Hussein Onn Malaysia (UTHM), which has flat land surface area. There are two sites of study were involved to assess the performance of swale as stormwater quantity control, named as swale 1 and swale 2. Data collection was conducted on 100 meters of length for each swale. The velocity of swale was measured thrice by using a current meter according to the six-tenths depth method, after a rainfall event. The discharge of drainage area in UTHM was determined by the Rational Method (Qpeak), and the discharge of swales (Qswale) was evaluated by the Mean-Section Method. Manning’s roughness coefficient and the infiltration rate were also determined in order to describe the characteristics of swale, which contributing factors for the effectiveness of swale. The results shown that Qswale is greater than Qpeak at swale 1 and swale 2, which according to the Second Edition of MSMA, the swales are efficient as stormwater quantity control in preventing flash flood at the campus area of UTHM.

Item Type: Article
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD511-780 Sewage collection and disposal systems. Sewerage
Divisions: Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 16 Jan 2019 08:00
Last Modified: 16 Jan 2019 08:00
URI: http://eprints.uthm.edu.my/id/eprint/10523
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