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Determination of flow velocity for grass swale in UTHM

Mustaffa, Nurhazirah and Ahmad, Noor Aliza and Mohammad Razi, Mohd Adib (2015) Determination of flow velocity for grass swale in UTHM. In: The 3rd International Conference on Water Resources (ICWR 2015), 24-25 November 2015, Bayview Hotel, Langkawi, Malaysia.


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Grass swales are widely employed to encourage ground infiltration and reduce storm runoff in urban areas. Precipitation that infiltrated into surrounding soils is collected and conveyed by swales into nearby water bodies to prevent localized flooding. Swales are one of the means to reduce peak flows, reduce the water table, and minimize the causes of flood. However, a well functioned swale requires a systematic planning of construction. The aim of this study is to determine the flow velocity for grass swale in Universiti Tun Hussein Onn Malaysia (UTHM) based upon the observed swale profile. Next, determine its effectiveness on reducing flow discharge of the swale. Data collection was conducted on wet grassed swale with the total length of swale is 100 meters. The swale is divided into three sections, where every section has three points. The measurements of flow velocity have been taken three times at each point after a rainfall event by using the current meter flow. As a preliminary study, levelling work has been done on the swale beforehand to obtain the swale profile. The results showed various values of flow velocity according to the profile of swales and its flow depth, also showed the difference in flow discharge of the grass swale. A well functioned swale must have a suitable swale profile so that the swale could slow down the flow velocity and reduce the flow discharge of the swale

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: grass swale; swale profile; flow velocity; flow discharge
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
Depositing User: Mrs. Nurhayati Ali
Date Deposited: 13 Aug 2018 03:41
Last Modified: 13 Aug 2018 03:41
URI: http://eprints.uthm.edu.my/id/eprint/7680
Statistic Details: View Download Statistic

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