Atmospheric thermodynamics
; Boiler circulation
; Boltzmann equation
; Marine pollution
; Pollution
; Circulation patterns
; Coastal waters
; Dispersion coefficient
; Pollutant transport
; Shipping activities
; Three dimensional unstructured grid
; Unstructured grid
; Water surface elevations
; Water pollution
; coastal water
; dispersion
; flushing
; pollutant transport
; three-dimensional modeling
; water pollution
; Article
; coastal waters
; concentration (parameters)
; controlled study
; dispersion
; flow kinetics
; hydrodynamics
; meteorological phenomena
; Northeast monsoon
; pollution transport
; quantitative study
; sea pollution
; Singapore
; Southwest monsoon
; volume averaged concentration
; environmental monitoring
; theoretical model
; water flow
; water pollutant
; wind
; Strait of Singapore
; water pollutant
; Environmental Monitoring
; Models, Theoretical
; Singapore
; Water Movements
; Water Pollutants
; Wind
Scopus学科分类:
Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
Intensive economic and shipping activities in Singapore Strait have caused Singapore coastal waters to be under high risk of water pollution. A nested three-dimensional unstructured-grid SUNTANS model is applied to Singapore coastal waters to simulate flow and pollutant transport. The small domain (~�50�m resolution) Singapore coastal model is nested within a large domain (~�200�m resolution) regional model. The nested model is able to predict water surface elevations and velocities with high R2 values of 0.96 and 0.91, respectively. Model results delineate the characteristics of circulation pattern in Singapore coastal waters during the Northeast and Southwest monsoons. The pollutants are modeled as passive tracers, and are released at six key sailing locations Points 1–6 in Singapore coastal waters and are named as Passive Tracers 1–6, respectively. Our results show that the rate of dispersion is twice as large for the Northeast monsoon compared to the Southwest monsoon due to differences in large-scale monsoons and small-scale local winds. The volume averaged concentration (VAC) diminishes faster and the local flushing time is shorter during the Northeast monsoon than the Southwest monsoon. Dispersion coefficients K and the VAC decreasing rate are maximum for Tracers 2 and 3 with shortest local flushing time due to the strong surrounding currents and abrupt bathymetry changes near Senang and St. John Islands. Dispersion coefficients K and the VAC decreasing rate are minimum for Tracer 1 due to weak currents induced by the semi-enclosed coastline near Tuas. It is found that both the lateral dispersion coefficient Ky and the compound dispersion coefficient K obey a “4/3-law”, which defines a linear correlation between dispersion coefficients and 4/3-power of selected length scale. � 2016 Elsevier Ltd
National University of Singapore, Department of Civil and Environmental Engineering, 1 Engineering Drive 2, Singapore
Recommended Citation:
Xu M.,Chua V.P.. A numerical study on flow and pollutant transport in Singapore coastal waters[J]. Marine Pollution Bulletin,2016-01-01,111(2018-01-02)