MORPHOLOGIC CHANGE IN TWO ARCTIC DELTAS.
Morphologic change in the deltas of two rivers, the Blow in northwestern Canada and the Colville in Alaska, is described and analyzed. The drainage basin of each river is confined to the Arctic Slope and is characterized by arctic conditions. Morphologic change is the result of the integration of a...
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ftdtic:AD0688718 2023-05-15T14:38:17+02:00 MORPHOLOGIC CHANGE IN TWO ARCTIC DELTAS. Walker,H. J. McCloy,J. M. ARCTIC INST OF NORTH AMERICA WASHINGTON D C 1969-01 text/html http://www.dtic.mil/docs/citations/AD0688718 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0688718 en eng http://www.dtic.mil/docs/citations/AD0688718 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Hydrology Limnology and Potamology (*DELTAS ARCTIC REGIONS) DRAINAGE EROSION RIVERS SNOW INTERACTIONS PERMAFROST ICE FLOW FIELDS WATER DEPOSITS ALASKA CANADA COLVILLE RIVER *GEOMORPHOLOGY Text 1969 ftdtic 2016-02-18T22:05:24Z Morphologic change in the deltas of two rivers, the Blow in northwestern Canada and the Colville in Alaska, is described and analyzed. The drainage basin of each river is confined to the Arctic Slope and is characterized by arctic conditions. Morphologic change is the result of the integration of a variety of processes some of which do not operate in temperate or tropical deltas. Although ice, like snow, is a passive agent during most of the time it is present, its erosional, transportational and depositional effectiveness may be great. However, by far the most important agent in deltaic change is flowing water which begins to operate once flow onto and over the ice is initiated. Permafrost which is present except beneath the largest lakes greatly influences erosion. Bank retreat may proceed gradually or by the sudden collapse of blocks from banks which have been undercut by as much as eight meters. Morphologic change in arctic deltas, like most other physical and biologic change in the Arctic, tends to be concentrated in a short period of time, a period of time centered around breakup. (Author) Prepared in cooperation with Louisiana State Univ., Baton Rouge. Coastal Studies Inst. and Montana Univ., Missoula. Dept. of Geography. Text Arctic Ice permafrost Alaska Defense Technical Information Center: DTIC Technical Reports database Arctic Canada |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Hydrology Limnology and Potamology (*DELTAS ARCTIC REGIONS) DRAINAGE EROSION RIVERS SNOW INTERACTIONS PERMAFROST ICE FLOW FIELDS WATER DEPOSITS ALASKA CANADA COLVILLE RIVER *GEOMORPHOLOGY |
spellingShingle |
Hydrology Limnology and Potamology (*DELTAS ARCTIC REGIONS) DRAINAGE EROSION RIVERS SNOW INTERACTIONS PERMAFROST ICE FLOW FIELDS WATER DEPOSITS ALASKA CANADA COLVILLE RIVER *GEOMORPHOLOGY Walker,H. J. McCloy,J. M. MORPHOLOGIC CHANGE IN TWO ARCTIC DELTAS. |
topic_facet |
Hydrology Limnology and Potamology (*DELTAS ARCTIC REGIONS) DRAINAGE EROSION RIVERS SNOW INTERACTIONS PERMAFROST ICE FLOW FIELDS WATER DEPOSITS ALASKA CANADA COLVILLE RIVER *GEOMORPHOLOGY |
description |
Morphologic change in the deltas of two rivers, the Blow in northwestern Canada and the Colville in Alaska, is described and analyzed. The drainage basin of each river is confined to the Arctic Slope and is characterized by arctic conditions. Morphologic change is the result of the integration of a variety of processes some of which do not operate in temperate or tropical deltas. Although ice, like snow, is a passive agent during most of the time it is present, its erosional, transportational and depositional effectiveness may be great. However, by far the most important agent in deltaic change is flowing water which begins to operate once flow onto and over the ice is initiated. Permafrost which is present except beneath the largest lakes greatly influences erosion. Bank retreat may proceed gradually or by the sudden collapse of blocks from banks which have been undercut by as much as eight meters. Morphologic change in arctic deltas, like most other physical and biologic change in the Arctic, tends to be concentrated in a short period of time, a period of time centered around breakup. (Author) Prepared in cooperation with Louisiana State Univ., Baton Rouge. Coastal Studies Inst. and Montana Univ., Missoula. Dept. of Geography. |
author2 |
ARCTIC INST OF NORTH AMERICA WASHINGTON D C |
format |
Text |
author |
Walker,H. J. McCloy,J. M. |
author_facet |
Walker,H. J. McCloy,J. M. |
author_sort |
Walker,H. J. |
title |
MORPHOLOGIC CHANGE IN TWO ARCTIC DELTAS. |
title_short |
MORPHOLOGIC CHANGE IN TWO ARCTIC DELTAS. |
title_full |
MORPHOLOGIC CHANGE IN TWO ARCTIC DELTAS. |
title_fullStr |
MORPHOLOGIC CHANGE IN TWO ARCTIC DELTAS. |
title_full_unstemmed |
MORPHOLOGIC CHANGE IN TWO ARCTIC DELTAS. |
title_sort |
morphologic change in two arctic deltas. |
publishDate |
1969 |
url |
http://www.dtic.mil/docs/citations/AD0688718 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0688718 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Ice permafrost Alaska |
genre_facet |
Arctic Ice permafrost Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0688718 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766310389469937664 |