FLOOD HYDRAULICS DUE TO EMERGENT VEGETATION ALONG A RIPARIAN ZONE IN MEANDERING CHANNELS

Authors

  • Zulkiflee Ibrahim Department of Hydraulics and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM). 81310 UTM Johor Bahru, Johor, Malaysia
  • Zulhilmi Ismail Department of Hydraulics and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM). 81310 UTM Johor Bahru, Johor, Malaysia
  • Sobri Harun Department of Hydraulics and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM). 81310 UTM Johor Bahru, Johor, Malaysia
  • Koji Shiono Department of Civil and Building Engineering, Loughborough University, Leicestershire, United Kingdom
  • Nazirah Mohd. Zuki Department of Hydraulics and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM). 81310 UTM Johor Bahru, Johor, Malaysia
  • Md. Ridzuan Makhtar Department of Hydraulics and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM). 81310 UTM Johor Bahru, Johor, Malaysia
  • Mazlin Jumain Department of Hydraulics and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM). 81310 UTM Johor Bahru, Johor, Malaysia
  • Mohd. Suhaimi Abd. Rahman Department of Hydraulics and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM). 81310 UTM Johor Bahru, Johor, Malaysia
  • Mohamad Hidayat Jamal Department of Hydraulics and Hydrology, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM). 81310 UTM Johor Bahru, Johor, Malaysia

DOI:

https://doi.org/10.11113/jt.v78.9703

Keywords:

Physical modeling, laboratory experiment, meandering channel, floodplain vegetation, flood hydraulics

Abstract

Frequent floods around the globe including recent events in several states in Malaysia have damaged the residential properties, infrastructures and crops or even deaths. Clearing vegetations or trees on the floodplain has been pointed out as a contributing factor to the damages. Thus, the influence of floodplain vegetation on the river hydraulics during flooding must be better understood. The hydraulics of flood flows in non-erodible vegetated meandering channel was experimented in the laboratory where two-lined steel rods were installed along a riparian zone to simulate as trees. The stage-discharge relationship, flow resistance, depth-averaged velocity, streamwise vorticity and boundary shear stress patterns during shallow and deep flood inundations were studied. The findings showed that floodplain vegetation had increased the channel flow depth by 32% and its flow resistance. The velocity in vegetated zone was lowered and the shear stress reduced by 86.5% to 91% along the river meander. In addition, the trees also limit flow interaction between main channel and floodplain

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Published

2016-09-28

How to Cite

FLOOD HYDRAULICS DUE TO EMERGENT VEGETATION ALONG A RIPARIAN ZONE IN MEANDERING CHANNELS. (2016). Jurnal Teknologi, 78(9-4). https://doi.org/10.11113/jt.v78.9703