Investigating an Innovative Sea-Based Strategy to Mitigate Coastal City Flood Disasters and Its Feasibility Study for Brisbane, Australia

Khalil, Usman; Yang, Shu-Qing; Sivakumar, Muttucumaru; Enever, Keith; Sajid, Mariam; Riaz, Muhammad Zain Bin

doi:10.3390/w12102744

Cited by 12 publications

(5 citation statements)

References 41 publications

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“…Many researchers have successfully used the MIKE 21 FM model to investigate the hydrodynamic process of a large river and coastal bay, like Dongting Lake, China (Y. Liu et al, 2019) the Poyang Lake, China (Li & Yao, 2015;Li, Zhang, Tan, & Yao, 2020), Brisbane River estuary (Khalil et al, 2020), Vembanad Lake, India (Haldar, Khosa, & Gosain, 2019), Lake Alexandrina (J. Liu, Sivakumar, Yang, & Jones, 2018) and Deer Creek in the City of Brentwood (Shrestha et al, 2020).…”

Section: Hydrodynamic Modelmentioning

confidence: 99%

Modelling the compound flood hydrodynamics under mesh convergence and future storm surge events in Brisbane River Estuary, Australia

Khalil

Yang

Sivakumar

et al. 2022

Preprint

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Abstract. Floods are the most common and destructive disasters around the globe, which becomes more challenging in coastal areas due to higher population density and catchment areas relative to floods in an inland area. For effective coastal flood management to reduce flood adverse impacts it is necessary to investigate the flooding processes and their joint interaction in a coastal area. This paper selected the Brisbane River Estuary, Australia as an example, and the MIKE 21 model is applied to investigate the effects of mesh resolution on the flood discharge and to explores compound flooding by computing variances in coastal flood assessments resulting from a separation of tidal and riverine processes. The statistical results showed that the Nash-Sutcliffe coefficient, E of water level are varied from 0.84 to 0.95 and the model simulated the 2011 flood extent results agreed with 90 % accuracy with the observed flood extent. Five mesh resolutions cases were analyzed and the result found that the finer mesh resolution Case 5 was more appropriate for calculating the peak discharge with 2.7 % with estimated discharge. Compound flood event simulation results emphasized that not considering the interaction of various flooding drivers caused 0.62 m and 0.12 m reduction in the flood levels at Jindalee and Brisbane city gauges, and uncertainties in flood extent. Simulated results of flood at Brisbane city gauge, showed that 2011 and 2013 floods with storm surge scenario 4 demonstrate, the increase in flood level to be 12 % and 34 % respectively. The results recommend flooding assessment by using mesh convergence with joint probability of compound flood under future storm surge for planning and management of coastal projects.

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Section: Hydrodynamic Modelmentioning

confidence: 99%

Modelling the compound flood hydrodynamics under mesh convergence and future storm surge events in Brisbane River Estuary, Australia

Khalil

Yang

Sivakumar

et al. 2022

Preprint

Self Cite

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“…For instance, dredging was studied in the coastal reservoir in the Brisbane River estuary. Widening the river and control gates improved water flow, regulated water levels, and assisted in floodwater adaptation (Khalil et al 2020). Other techniques to control the water levels in coastal wetlands are the use of dikes and water gates.…”

Section: Introductionmentioning

confidence: 99%

“…Other techniques to control the water levels in coastal wetlands are the use of dikes and water gates. Recently, tidal gate management approaches, together with tidal surge fluctuations, are being used to accomplish water management objectives (Kuo and Wang 2018, Vinten et al 2019, Khalil et al 2020, Wang et al 2020, Gaydon et al 2021, Guiot et al 2023. Vinten et al (2019) assessed the potential for hydraulic structure and dredging to manage water inflow and nutrient input into shallow wetlands in Scotland and to promote an adaptive water management strategy.…”

Section: Introductionmentioning

confidence: 99%

Development of a wetland management plan for Taiqu Saltpan, Taiwan, by stakeholder engagement and water gate operation

Wang¹,

Salim²,

LePage³

2023

E&S

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We examined different water management strategies for Taiqu Saltpan, which is part of the Qigu Saltpan Wetland complex in Tainan, Taiwan. The Taiqu saltpans are surrounded by artificial dikes, lack a water management plan, have insufficient water input during the dry season, and have little to no natural hydrologic connectivity to other wetlands in the Qigu Saltpan Wetland complex. Water is an important requirement for habitat and life. The need for a water management plan is crucial to enhance the existing ecosystem services. Besides the need to manage water, a robust stakeholder engagement plan was needed to better understand past practices and events and to develop a future saltpan management plan. Our aim was to bridge local stakeholder knowledge and scientific evidence into management strategies that could be used to improve waterflow between wetlands in the Qigu Saltpan Wetland complex with some soft modification of the existing infrastructure such as removing culverts, dikes, and dredging, and adapting the existing rules for gate operation without increasing the risk of flooding to the surround communities. Data were generated by merging field surveys (water gauge, velocity meter, and bird surveys) and aerial images to identify the saltpan hydrological dynamics before and after water gate operations in March and April 2020, respectively. Physical-inundation drainage modelling was used to calibrate, verify, and simulate four different management scenarios. Most of the water birds that use the Qigu Saltpan Wetland complex are from the Charadriidae and Scolopacidae families. Scenarios II and IV, which produced water depths that were suitable for members of the Charadriidae and Scolopacidae, are recommended. Implementation of water gate operations and stakeholder engagement would help in making decisions regarding future saltpan use in the face of uncertain challenges such as climate change.

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“…Recently, several research studies were conducted to investigate the hydrodynamics of estuaries [2][3][4][5][6][7][8][9][10][11][12]. Many driving conditions, such as river flow characteristics, tidal amplitude, sediment properties, surges, waves, currents, and bathymetry, affect the dominant physical processes in an estuary.…”

Section: Introductionmentioning

confidence: 99%

SWAN Modeling of Dredging Effect on the Oued Sebou Estuary

Iouzzi

Mouakkir

Meftah

et al. 2022

Water

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The estuary ecosystem’s health and ecological integrity are essential for preserving environmental quality, habitats, and economic activity. The main objective of the present study is to comprehend the wave hydrodynamic impact on the Oued Sebou estuary, which is situated in the Kenitra region on Morocco’s north Atlantic coast in North Africa. Specifically, it focused on the dredging effect (caused by sand extraction) on the wave motion and its impact on the estuary environment. Different scenarios of wave-propagation simulations were carried out, varying the significant wave height, in deep water (from 1.5 to 4 m), and considering the bathymetry before and after two dredging cases of 2- and 4-m depths. The change of wave height at the Oued Sebou estuary shoreline was simulated by using the third version of the Simulating Waves Nearshore Model (SWAN). The SWAN model formulates the wave evolution in terms of a spectral energy balance on a structured grid. The effect of dredging on the wave spreading in addition to the flow hydrodynamic structures were extensively analyzed. According to the simulated results, the dredging activities in the Oued Sebou estuary mainly affect the river mouth and the southern breakwater area, increasing the potential erosive action. The areas at the northern coastal strip and near the northern breakwater are subject to possible accumulation of sediments.

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Investigating an Innovative Sea-Based Strategy to Mitigate Coastal City Flood Disasters and Its Feasibility Study for Brisbane, Australia

Cited by 12 publications

References 41 publications

Modelling the compound flood hydrodynamics under mesh convergence and future storm surge events in Brisbane River Estuary, Australia

Modelling the compound flood hydrodynamics under mesh convergence and future storm surge events in Brisbane River Estuary, Australia

Development of a wetland management plan for Taiqu Saltpan, Taiwan, by stakeholder engagement and water gate operation

SWAN Modeling of Dredging Effect on the Oued Sebou Estuary

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