Next Article in Journal
Stress-Testing Framework for Urban Water Systems: A Source to Tap Approach for Stochastic Resilience Assessment
Next Article in Special Issue
Solution of Shallow-Water Equations by a Layer-Integrated Hydrostatic Least-Squares Finite-Element Method
Previous Article in Journal
Economic Analysis of Atomization Drying of Concentrated Solution Based on Zero Discharge of Desulphurization Wastewater
Previous Article in Special Issue
A Weighted-Least-Squares Meshless Model for Non-Hydrostatic Shallow Water Waves
Article

Interplay between Asian Monsoon and Tides Affects the Plume Dispersal of the New Hu-Wei River off the Coast of Midwest Taiwan

1
Department of Marine Environmental Informatics, National Taiwan Ocean University, Keelung 20224, Taiwan
2
Safety Heath and Environment Center, Formosa Plastics Group, No. 1, Mailiao 638, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editors: Shin-Jye Liang and Miguel Ortega-Sánchez
Water 2022, 14(2), 152; https://doi.org/10.3390/w14020152
Received: 25 October 2021 / Revised: 21 December 2021 / Accepted: 4 January 2022 / Published: 7 January 2022
(This article belongs to the Special Issue Hydrodynamics in Ocean Environment: Experiment and Simulation)
In the coupled estuary–shelf system, plumes originating from the New Hu-Wei and Choshui rivers, consisting of many terrestrial materials, could contaminate the water of the Mailiao industrial harbor. To determine the contribution of the two rivers to pollution, the interaction between river-forced, tide-generating, and monsoon-driven water motions in and around the Mailiao industrial zone harbor was examined by performing a series of numerical model experiments. We used a three-dimensional general circulation model to examine the interplay between Asian monsoon-driven, river-forced, and tide-induced water motions, one of which could primarily affect the plume. The model-derived results for different river discharges revealed that almost all of the ammonium entering the harbor had a slope-positive trend, with oscillations in response to flood–ebb tidal cycles. The ammonium increased with time and flux, except for the 10 m3/s flux. Although the river discharge flux exceeded 200 m3/s, the ammonium entering the harbor was the same as that of the 200 m3/s flux; the ammonium concentration did not increase significantly with time after the flux exceeded 200 m3/s. In addition, irrespective of flood or ebb tidal currents being suppressed by strong Asian monsoons, this mechanism avoided contaminating the water quality of the harbor while northeasterly winds prevailed. By contrast, the southwesterly monsoon drove the geostrophic current northward along the coast; concurrently, the coastal sea level increased to form the surface isobar slope up toward the coast, producing a secondary flow to accelerate geostrophic alongshore currents. The northward geostrophic currents compressed the plumes shoreward, forming a relatively narrow-band plume; the coupling model demonstrated that the southwesterly monsoon-driven current pushed plumes favorably along the west pier into the harbor. View Full-Text
Keywords: Mailiao; New Hu-Wei river; Asian monsoon; tidal currents; general circulation model Mailiao; New Hu-Wei river; Asian monsoon; tidal currents; general circulation model
Show Figures

Figure 1

MDPI and ACS Style

Ho, C.-Y.; Fang, T.-H.; Wu, C.-H.; Lee, H.-J. Interplay between Asian Monsoon and Tides Affects the Plume Dispersal of the New Hu-Wei River off the Coast of Midwest Taiwan. Water 2022, 14, 152. https://doi.org/10.3390/w14020152

AMA Style

Ho C-Y, Fang T-H, Wu C-H, Lee H-J. Interplay between Asian Monsoon and Tides Affects the Plume Dispersal of the New Hu-Wei River off the Coast of Midwest Taiwan. Water. 2022; 14(2):152. https://doi.org/10.3390/w14020152

Chicago/Turabian Style

Ho, Chia-Ying, Tien-Hsi Fang, Cheng-Han Wu, and Hung-Jen Lee. 2022. "Interplay between Asian Monsoon and Tides Affects the Plume Dispersal of the New Hu-Wei River off the Coast of Midwest Taiwan" Water 14, no. 2: 152. https://doi.org/10.3390/w14020152

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop