The variability of the sediment plume and ocean circulation features of the Nass River Estuary, British Columbia
The Nass River discharges into Nass Bay and Iceberg Bay, which are adjoining tidal inlets located within the northern inland waters of British Columbia, Canada. After the Skeena River, the Nass River is the second longest river within northern British Columbia, which discharges directly into Canadia...
Published in: | Satellite Oceanography and Meteorology |
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Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Whioce Publishing Pte Ltd
2017
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Subjects: | |
Online Access: | https://ojs.whioce.com/index.php/som/article/view/316 https://doi.org/10.18063/som.v2i2.316 |
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ftwhioceojs:oai:ojs.ojs.whioce.com:article/316 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Whioce Journals |
op_collection_id |
ftwhioceojs |
language |
English |
topic |
Nass Bay Nass River Iceberg Bay Observatory Inlet Portland Inlet Circulation Numerical Model Tidal Current Wind-driven Current Stratification |
spellingShingle |
Nass Bay Nass River Iceberg Bay Observatory Inlet Portland Inlet Circulation Numerical Model Tidal Current Wind-driven Current Stratification Fissel, David B. Lin, Yuehua Scoon, Alison Lim, Jose Brown, Leslie Clouston, Ryan The variability of the sediment plume and ocean circulation features of the Nass River Estuary, British Columbia |
topic_facet |
Nass Bay Nass River Iceberg Bay Observatory Inlet Portland Inlet Circulation Numerical Model Tidal Current Wind-driven Current Stratification |
description |
The Nass River discharges into Nass Bay and Iceberg Bay, which are adjoining tidal inlets located within the northern inland waters of British Columbia, Canada. After the Skeena River, the Nass River is the second longest river within northern British Columbia, which discharges directly into Canadian waters of the Pacific Ocean. It is also supports one of the most productive salmon fisheries in northern British Columbia. The Nass River discharges into the eastern end of Nass Bay. Nass Bay, in turn feeds into Portland Canal and the fresh surface waters then flows westward to the Pacific Ocean via Dixon Entrance. The tides in Northern British Columbia are very large with a tidal height range of just over 7 m. Nass Bay is a shallow inlet of less than 10 km in length with typical water depths of than 10 m or less. The existing knowledge of oceanographic processes in Nass and Iceberg Bays was rudimentary until three years ago, when the first modern oceanographic measurements were obtained. In this study, the seasonal and tidal variability of the lateral extent of the Nass River surface plume is mapped from analyses of Landsat satellite data spanning the period from 2008 to 2015. A high resolution coupled three dimensional (3D) hydrodynamic model was developed and implemented, within the widely used and accepted Delft3D modeling framework, which was forced and validated using recent 2013-2016 in-situ oceanographic measurements. The combined satellite and numerical modeling methods are used to study the physical oceanographic and sediment transport regime of Nass and Iceberg Bays and the adjoining waters of Portland Inlet and Observatory Inlet. The ocean circulation of Nass and Iceberg Bays was found to be dominated by tidal currents, and by the highly seasonal and variable Nass River freshwater discharges. Complex lateral spatial patterns in the tidal currents occur due to the opening of the southwestern side of Nass Bay onto the deeper adjoining waters of Iceberg Bay. Surface winds are limited to a secondary role in the circulation variability. The sediment dynamics of the Nass Bay system features a very prominent surface sediment plume present from the time of freshet in mid-spring through to large rainfall runoff events in the fall. The time-varying turbidity distribution and transport paths of the Nass River sediment discharges in the study area were characterized using the model results combined with an analysis of several high-resolution multi-year Landsat satellite data sets. |
format |
Article in Journal/Newspaper |
author |
Fissel, David B. Lin, Yuehua Scoon, Alison Lim, Jose Brown, Leslie Clouston, Ryan |
author_facet |
Fissel, David B. Lin, Yuehua Scoon, Alison Lim, Jose Brown, Leslie Clouston, Ryan |
author_sort |
Fissel, David B. |
title |
The variability of the sediment plume and ocean circulation features of the Nass River Estuary, British Columbia |
title_short |
The variability of the sediment plume and ocean circulation features of the Nass River Estuary, British Columbia |
title_full |
The variability of the sediment plume and ocean circulation features of the Nass River Estuary, British Columbia |
title_fullStr |
The variability of the sediment plume and ocean circulation features of the Nass River Estuary, British Columbia |
title_full_unstemmed |
The variability of the sediment plume and ocean circulation features of the Nass River Estuary, British Columbia |
title_sort |
variability of the sediment plume and ocean circulation features of the nass river estuary, british columbia |
publisher |
Whioce Publishing Pte Ltd |
publishDate |
2017 |
url |
https://ojs.whioce.com/index.php/som/article/view/316 https://doi.org/10.18063/som.v2i2.316 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-132.003,-132.003,54.416,54.416) ENVELOPE(69.177,69.177,-49.559,-49.559) ENVELOPE(-129.916,-129.916,54.966,54.966) ENVELOPE(-129.845,-129.845,54.992,54.992) ENVELOPE(-129.840,-129.840,55.243,55.243) ENVELOPE(-130.029,-130.029,55.243,55.243) ENVELOPE(-130.410,-130.410,54.733,54.733) ENVELOPE(-130.198,-130.198,53.646,53.646) ENVELOPE(-130.113,-130.113,54.015,54.015) |
geographic |
British Columbia Canada Dixon Entrance Iceberg Bay Nass Bay Nass River Observatory Inlet Pacific Portland Canal Portland Inlet Skeena Skeena River |
geographic_facet |
British Columbia Canada Dixon Entrance Iceberg Bay Nass Bay Nass River Observatory Inlet Pacific Portland Canal Portland Inlet Skeena Skeena River |
genre |
Iceberg Bay |
genre_facet |
Iceberg Bay |
op_source |
Satellite Oceanography and Meteorology; Vol 2, No 2 (Published) 2424-9505 2424-8959 |
op_relation |
https://ojs.whioce.com/index.php/som/article/view/316/275 https://ojs.whioce.com/index.php/som/article/view/316 doi:10.18063/som.v2i2.316 |
op_rights |
Copyright (c) 2017 Satellite Oceanography and Meteorology |
op_doi |
https://doi.org/10.18063/som.v2i2.316 |
container_title |
Satellite Oceanography and Meteorology |
container_volume |
2 |
container_issue |
2 |
_version_ |
1766032466257117184 |
spelling |
ftwhioceojs:oai:ojs.ojs.whioce.com:article/316 2023-05-15T16:42:00+02:00 The variability of the sediment plume and ocean circulation features of the Nass River Estuary, British Columbia Fissel, David B. Lin, Yuehua Scoon, Alison Lim, Jose Brown, Leslie Clouston, Ryan 2017-12-28 application/pdf https://ojs.whioce.com/index.php/som/article/view/316 https://doi.org/10.18063/som.v2i2.316 eng eng Whioce Publishing Pte Ltd https://ojs.whioce.com/index.php/som/article/view/316/275 https://ojs.whioce.com/index.php/som/article/view/316 doi:10.18063/som.v2i2.316 Copyright (c) 2017 Satellite Oceanography and Meteorology Satellite Oceanography and Meteorology; Vol 2, No 2 (Published) 2424-9505 2424-8959 Nass Bay Nass River Iceberg Bay Observatory Inlet Portland Inlet Circulation Numerical Model Tidal Current Wind-driven Current Stratification info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2017 ftwhioceojs https://doi.org/10.18063/som.v2i2.316 2022-04-06T07:28:29Z The Nass River discharges into Nass Bay and Iceberg Bay, which are adjoining tidal inlets located within the northern inland waters of British Columbia, Canada. After the Skeena River, the Nass River is the second longest river within northern British Columbia, which discharges directly into Canadian waters of the Pacific Ocean. It is also supports one of the most productive salmon fisheries in northern British Columbia. The Nass River discharges into the eastern end of Nass Bay. Nass Bay, in turn feeds into Portland Canal and the fresh surface waters then flows westward to the Pacific Ocean via Dixon Entrance. The tides in Northern British Columbia are very large with a tidal height range of just over 7 m. Nass Bay is a shallow inlet of less than 10 km in length with typical water depths of than 10 m or less. The existing knowledge of oceanographic processes in Nass and Iceberg Bays was rudimentary until three years ago, when the first modern oceanographic measurements were obtained. In this study, the seasonal and tidal variability of the lateral extent of the Nass River surface plume is mapped from analyses of Landsat satellite data spanning the period from 2008 to 2015. A high resolution coupled three dimensional (3D) hydrodynamic model was developed and implemented, within the widely used and accepted Delft3D modeling framework, which was forced and validated using recent 2013-2016 in-situ oceanographic measurements. The combined satellite and numerical modeling methods are used to study the physical oceanographic and sediment transport regime of Nass and Iceberg Bays and the adjoining waters of Portland Inlet and Observatory Inlet. The ocean circulation of Nass and Iceberg Bays was found to be dominated by tidal currents, and by the highly seasonal and variable Nass River freshwater discharges. Complex lateral spatial patterns in the tidal currents occur due to the opening of the southwestern side of Nass Bay onto the deeper adjoining waters of Iceberg Bay. Surface winds are limited to a secondary role in the circulation variability. The sediment dynamics of the Nass Bay system features a very prominent surface sediment plume present from the time of freshet in mid-spring through to large rainfall runoff events in the fall. The time-varying turbidity distribution and transport paths of the Nass River sediment discharges in the study area were characterized using the model results combined with an analysis of several high-resolution multi-year Landsat satellite data sets. Article in Journal/Newspaper Iceberg Bay Whioce Journals British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Dixon Entrance ENVELOPE(-132.003,-132.003,54.416,54.416) Iceberg Bay ENVELOPE(69.177,69.177,-49.559,-49.559) Nass Bay ENVELOPE(-129.916,-129.916,54.966,54.966) Nass River ENVELOPE(-129.845,-129.845,54.992,54.992) Observatory Inlet ENVELOPE(-129.840,-129.840,55.243,55.243) Pacific Portland Canal ENVELOPE(-130.029,-130.029,55.243,55.243) Portland Inlet ENVELOPE(-130.410,-130.410,54.733,54.733) Skeena ENVELOPE(-130.198,-130.198,53.646,53.646) Skeena River ENVELOPE(-130.113,-130.113,54.015,54.015) Satellite Oceanography and Meteorology 2 2 |