Sea water intrusion model of Amchitka Island, Alaska
During the 1960s and 1970s, Amchitka Island, Alaska, was the site of three underground nuclear tests, referred to as Milrow, Long Shot and Cannikin. Amchitka Island is located in the western part of the Aleutian Island chain, Alaska. The groundwater systems affected by the three underground nuclear...
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ftosti:oai:osti.gov:418394 2023-07-30T03:55:48+02:00 Sea water intrusion model of Amchitka Island, Alaska Wheatcraft, S.W. 2009-11-10 application/pdf http://www.osti.gov/servlets/purl/418394 https://www.osti.gov/biblio/418394 https://doi.org/10.2172/418394 unknown http://www.osti.gov/servlets/purl/418394 https://www.osti.gov/biblio/418394 https://doi.org/10.2172/418394 doi:10.2172/418394 54 ENVIRONMENTAL SCIENCES ;45 MILITARY TECHNOLOGY WEAPONRY AND NATIONAL DEFENSE AMCHITKA ISLAND AREA HYDROLOGY GROUND WATER FLOW MODELS NUCLEAR EXPLOSIONS UNDERGROUND EXPLOSIONS RADIONUCLIDE MIGRATION SEAWATER AQUIFERS GROUNDWATER RECHARGE HYDRAULIC CONDUCTIVITY PERMEABILITY 2009 ftosti https://doi.org/10.2172/418394 2023-07-11T08:33:38Z During the 1960s and 1970s, Amchitka Island, Alaska, was the site of three underground nuclear tests, referred to as Milrow, Long Shot and Cannikin. Amchitka Island is located in the western part of the Aleutian Island chain, Alaska. The groundwater systems affected by the three underground nuclear tests at Amchitka Island are essentially unmonitored because all of the current monitoring wells are too shallow and not appropriately placed to detect migration from the cavities. The dynamics of the island`s fresh water-sea water hydrologic system will control contaminant migration from the three event cavities, with migration expected in the direction of the Bering Sea from Long shot and Cannikin and the Pacific Ocean from Milrow. The hydrogeologic setting (actively flowing groundwater system to maintain a freshwater lens) suggests a significant possibility for relatively rapid contaminant migration from these sites, but also presents an opportunity to use projected flowpaths to a monitoring advantage. The purpose of this investigation is to develop a conceptual model of the Amchitka groundwater system and to produce computer model simulations that reflect the boundary conditions and hydraulic properties of the groundwater system. The simulations will be used to assess the validity of the proposed conceptual model and highlight the uncertainties in hydraulic properties of the aquifer. The uncertainties will be quantified by sensitivity analyses on various model parameters. Within the limitations of the conceptual model and the computer simulations, conclusions will be drawn regarding potential radionuclide migration from the three underground nuclear tests. Other/Unknown Material Aleutian Island Bering Sea Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Amchitka ENVELOPE(178.878,178.878,51.567,51.567) Amchitka Island ENVELOPE(178.983,178.983,51.542,51.542) Bering Sea Pacific |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES ;45 MILITARY TECHNOLOGY WEAPONRY AND NATIONAL DEFENSE AMCHITKA ISLAND AREA HYDROLOGY GROUND WATER FLOW MODELS NUCLEAR EXPLOSIONS UNDERGROUND EXPLOSIONS RADIONUCLIDE MIGRATION SEAWATER AQUIFERS GROUNDWATER RECHARGE HYDRAULIC CONDUCTIVITY PERMEABILITY |
spellingShingle |
54 ENVIRONMENTAL SCIENCES ;45 MILITARY TECHNOLOGY WEAPONRY AND NATIONAL DEFENSE AMCHITKA ISLAND AREA HYDROLOGY GROUND WATER FLOW MODELS NUCLEAR EXPLOSIONS UNDERGROUND EXPLOSIONS RADIONUCLIDE MIGRATION SEAWATER AQUIFERS GROUNDWATER RECHARGE HYDRAULIC CONDUCTIVITY PERMEABILITY Wheatcraft, S.W. Sea water intrusion model of Amchitka Island, Alaska |
topic_facet |
54 ENVIRONMENTAL SCIENCES ;45 MILITARY TECHNOLOGY WEAPONRY AND NATIONAL DEFENSE AMCHITKA ISLAND AREA HYDROLOGY GROUND WATER FLOW MODELS NUCLEAR EXPLOSIONS UNDERGROUND EXPLOSIONS RADIONUCLIDE MIGRATION SEAWATER AQUIFERS GROUNDWATER RECHARGE HYDRAULIC CONDUCTIVITY PERMEABILITY |
description |
During the 1960s and 1970s, Amchitka Island, Alaska, was the site of three underground nuclear tests, referred to as Milrow, Long Shot and Cannikin. Amchitka Island is located in the western part of the Aleutian Island chain, Alaska. The groundwater systems affected by the three underground nuclear tests at Amchitka Island are essentially unmonitored because all of the current monitoring wells are too shallow and not appropriately placed to detect migration from the cavities. The dynamics of the island`s fresh water-sea water hydrologic system will control contaminant migration from the three event cavities, with migration expected in the direction of the Bering Sea from Long shot and Cannikin and the Pacific Ocean from Milrow. The hydrogeologic setting (actively flowing groundwater system to maintain a freshwater lens) suggests a significant possibility for relatively rapid contaminant migration from these sites, but also presents an opportunity to use projected flowpaths to a monitoring advantage. The purpose of this investigation is to develop a conceptual model of the Amchitka groundwater system and to produce computer model simulations that reflect the boundary conditions and hydraulic properties of the groundwater system. The simulations will be used to assess the validity of the proposed conceptual model and highlight the uncertainties in hydraulic properties of the aquifer. The uncertainties will be quantified by sensitivity analyses on various model parameters. Within the limitations of the conceptual model and the computer simulations, conclusions will be drawn regarding potential radionuclide migration from the three underground nuclear tests. |
author |
Wheatcraft, S.W. |
author_facet |
Wheatcraft, S.W. |
author_sort |
Wheatcraft, S.W. |
title |
Sea water intrusion model of Amchitka Island, Alaska |
title_short |
Sea water intrusion model of Amchitka Island, Alaska |
title_full |
Sea water intrusion model of Amchitka Island, Alaska |
title_fullStr |
Sea water intrusion model of Amchitka Island, Alaska |
title_full_unstemmed |
Sea water intrusion model of Amchitka Island, Alaska |
title_sort |
sea water intrusion model of amchitka island, alaska |
publishDate |
2009 |
url |
http://www.osti.gov/servlets/purl/418394 https://www.osti.gov/biblio/418394 https://doi.org/10.2172/418394 |
long_lat |
ENVELOPE(178.878,178.878,51.567,51.567) ENVELOPE(178.983,178.983,51.542,51.542) |
geographic |
Amchitka Amchitka Island Bering Sea Pacific |
geographic_facet |
Amchitka Amchitka Island Bering Sea Pacific |
genre |
Aleutian Island Bering Sea Alaska |
genre_facet |
Aleutian Island Bering Sea Alaska |
op_relation |
http://www.osti.gov/servlets/purl/418394 https://www.osti.gov/biblio/418394 https://doi.org/10.2172/418394 doi:10.2172/418394 |
op_doi |
https://doi.org/10.2172/418394 |
_version_ |
1772809751121362944 |