Remote sensing of erosion and shallow water bathymetry to aid river navigation on the Colville River, Nuiqsut AK
Thesis (M.S.) University of Alaska Fairbanks, 2018 The Colville is the longest river (~600 km) in Arctic Alaska. Nuiqsut is an established Alaska Native community of ~400 people on the Colville River. Its residents rely heavily on the Colville for subsistence needs, however, changing river dynamics...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/9681 2023-05-15T15:18:31+02:00 Remote sensing of erosion and shallow water bathymetry to aid river navigation on the Colville River, Nuiqsut AK Payne, Cole S. Panda, Santosh Prakash, Anupma Brinkman, Todd 2018-08 http://hdl.handle.net/11122/9681 en_US eng http://hdl.handle.net/11122/9681 Geosciences Inland water transportation Alaska Colville River Erosion Thesis ms 2018 ftunivalaska 2023-02-23T21:37:19Z Thesis (M.S.) University of Alaska Fairbanks, 2018 The Colville is the longest river (~600 km) in Arctic Alaska. Nuiqsut is an established Alaska Native community of ~400 people on the Colville River. Its residents rely heavily on the Colville for subsistence needs, however, changing river dynamics caused by accelerated bank erosion, river siltation, low water, and shifting and drying channels are causing concern and making boat travel increasingly difficult and dangerous. Recently, local residents have reported increased erosion at bluff sites along the Colville, which threatens existing infrastructure. Also reported are unexpected shallow water sections along the main channel of the Colville, limiting their access to subsistence food sources. Residents have expressed a need for monitoring erosional rates on the Colville as well as a map product that could aid in river navigation. These concerns shaped the main goals of this Thesis: 1) To use remote sensing techniques to map and quantify erosion rates and the volume of land loss at selected bluff sites along the main channel of the Colville, and to assess the suitability of automated methods of regional erosion monitoring. 2) To use optical satellite images for mapping river bathymetry and generate GIS map products that show potential shallow water sections (<2m) and poor channel connections, and to assess the feasibility of future monitoring based off our methods that rely on extracting relative water depth values from publicly available optical remote sensing images. For our erosional study we used orthomosaics from high resolution aerial photos acquired in 1955 and 1979/1982, as well as high resolution WorldView-2 images from 2015 to quantify long-term erosion rates and the cubic volume of erosion. We found that, at the selected sites, erosion rates averaged 1 to 3.5 m per year. The erosion rate remained the same at one site and increased from 1955 to 2015 at two of the four sites. We estimated the volume of land loss to be in the magnitude of 166,000 ... Thesis Arctic Alaska University of Alaska: ScholarWorks@UA Arctic Fairbanks |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
topic |
Inland water transportation Alaska Colville River Erosion |
spellingShingle |
Inland water transportation Alaska Colville River Erosion Payne, Cole S. Remote sensing of erosion and shallow water bathymetry to aid river navigation on the Colville River, Nuiqsut AK |
topic_facet |
Inland water transportation Alaska Colville River Erosion |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2018 The Colville is the longest river (~600 km) in Arctic Alaska. Nuiqsut is an established Alaska Native community of ~400 people on the Colville River. Its residents rely heavily on the Colville for subsistence needs, however, changing river dynamics caused by accelerated bank erosion, river siltation, low water, and shifting and drying channels are causing concern and making boat travel increasingly difficult and dangerous. Recently, local residents have reported increased erosion at bluff sites along the Colville, which threatens existing infrastructure. Also reported are unexpected shallow water sections along the main channel of the Colville, limiting their access to subsistence food sources. Residents have expressed a need for monitoring erosional rates on the Colville as well as a map product that could aid in river navigation. These concerns shaped the main goals of this Thesis: 1) To use remote sensing techniques to map and quantify erosion rates and the volume of land loss at selected bluff sites along the main channel of the Colville, and to assess the suitability of automated methods of regional erosion monitoring. 2) To use optical satellite images for mapping river bathymetry and generate GIS map products that show potential shallow water sections (<2m) and poor channel connections, and to assess the feasibility of future monitoring based off our methods that rely on extracting relative water depth values from publicly available optical remote sensing images. For our erosional study we used orthomosaics from high resolution aerial photos acquired in 1955 and 1979/1982, as well as high resolution WorldView-2 images from 2015 to quantify long-term erosion rates and the cubic volume of erosion. We found that, at the selected sites, erosion rates averaged 1 to 3.5 m per year. The erosion rate remained the same at one site and increased from 1955 to 2015 at two of the four sites. We estimated the volume of land loss to be in the magnitude of 166,000 ... |
author2 |
Panda, Santosh Prakash, Anupma Brinkman, Todd |
format |
Thesis |
author |
Payne, Cole S. |
author_facet |
Payne, Cole S. |
author_sort |
Payne, Cole S. |
title |
Remote sensing of erosion and shallow water bathymetry to aid river navigation on the Colville River, Nuiqsut AK |
title_short |
Remote sensing of erosion and shallow water bathymetry to aid river navigation on the Colville River, Nuiqsut AK |
title_full |
Remote sensing of erosion and shallow water bathymetry to aid river navigation on the Colville River, Nuiqsut AK |
title_fullStr |
Remote sensing of erosion and shallow water bathymetry to aid river navigation on the Colville River, Nuiqsut AK |
title_full_unstemmed |
Remote sensing of erosion and shallow water bathymetry to aid river navigation on the Colville River, Nuiqsut AK |
title_sort |
remote sensing of erosion and shallow water bathymetry to aid river navigation on the colville river, nuiqsut ak |
publishDate |
2018 |
url |
http://hdl.handle.net/11122/9681 |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_relation |
http://hdl.handle.net/11122/9681 Geosciences |
_version_ |
1766348706652618752 |