Next Article in Journal
A Systematic Review of Quantitative Resilience Measures for Water Infrastructure Systems
Next Article in Special Issue
Responses of Bed Morphology to Vegetation Growth and Flood Discharge at a Sharp River Bend
Previous Article in Journal
Effect of Saturated Zone on Nitrogen Removal Processes in Stormwater Bioretention Systems
Previous Article in Special Issue
Near-Bed Monitoring of Suspended Sediment during a Major Flood Event Highlights Deficiencies in Existing Event-Loading Estimates
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Water 2018, 10(2), 163; https://doi.org/10.3390/w10020163

Cross-Scale Baroclinic Simulation of the Effect of Channel Dredging in an Estuarine Setting

1
Center for Coastal Resources Management, Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA 23062, USA
2
Department of Physical Sciences, Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA 23062, USA
3
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
4
School of Marine Sciences, University of Maine, Orono, ME 04469, USA
Current address: 1375 Greate Rd, Gloucester Point, VA 23062, USA.
*
Author to whom correspondence should be addressed.
Received: 4 December 2017 / Revised: 20 January 2018 / Accepted: 31 January 2018 / Published: 7 February 2018
Full-Text   |   PDF [5130 KB, uploaded 9 February 2018]   |  

Abstract

Holistic simulation approaches are often required to assess human impacts on a river-estuary-coastal system, due to the intrinsically linked processes of contrasting spatial scales. In this paper, a Semi-implicit Cross-scale Hydroscience Integrated System Model (SCHISM) is applied in quantifying the impact of a proposed hydraulic engineering project on the estuarine hydrodynamics. The project involves channel dredging and land expansion that traverse several spatial scales on an ocean-estuary-river-tributary axis. SCHISM is suitable for this undertaking due to its flexible horizontal and vertical grid design and, more importantly, its efficient high-order implicit schemes applied in both the momentum and transport calculations. These techniques and their advantages are briefly described along with the model setup. The model features a mixed horizontal grid with quadrangles following the shipping channels and triangles resolving complex geometries elsewhere. The grid resolution ranges from ~6.3 km in the coastal ocean to 15 m in the project area. Even with this kind of extreme scale contrast, the baroclinic model still runs stably and accurately at a time step of 2 min, courtesy of the implicit schemes. We highlight that the implicit transport solver alone reduces the total computational cost by 82%, as compared to its explicit counterpart. The base model is shown to be well calibrated, then it is applied in simulating the proposed project scenario. The project-induced modifications on salinity intrusion, gravitational circulation, and transient events are quantified and analyzed. View Full-Text
Keywords: cross-scale; baroclinic simulation; SCHISM; estuary and coastal ocean; channel deepening cross-scale; baroclinic simulation; SCHISM; estuary and coastal ocean; channel deepening
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Ye, F.; Zhang, Y.J.; Wang, H.V.; Huang, H.; Wang, Z.; Liu, Z.; Li, X. Cross-Scale Baroclinic Simulation of the Effect of Channel Dredging in an Estuarine Setting. Water 2018, 10, 163.

Show more citation formats Show less citations formats

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

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top