Changes
On March 7, 2022 at 1:12:20 PM CST, kelsey-friesenumanitoba-ca:
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Renamed resource A Time Series Analysis Based on Landsat Imagery. to Water and Vegetation Cover in Netley-Libau Marsh 1990 – 2013. Phase II Report: A time series analysis based on landsat imagery in Netley-Libau Marsh Reports
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4 | "affiliation": "Environment and Climate Change Canada", | 4 | "affiliation": "Environment and Climate Change Canada", | ||
5 | "creatorName": "Watchorn, K. Elise", | 5 | "creatorName": "Watchorn, K. Elise", | ||
6 | "email": "elisewatchorn@hotmail.com", | 6 | "email": "elisewatchorn@hotmail.com", | ||
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11 | "PublicationYear": "2022", | 11 | "PublicationYear": "2022", | ||
12 | "Publisher": "Enivronment and Climate Change Canada", | 12 | "Publisher": "Enivronment and Climate Change Canada", | ||
13 | "ResourceType": "report", | 13 | "ResourceType": "report", | ||
14 | "Rights": "Creative Commons Attribution 4.0 International", | 14 | "Rights": "Creative Commons Attribution 4.0 International", | ||
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22 | "descriptionType": "Abstract", | 22 | "descriptionType": "Abstract", | ||
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n | 28 | "groups": [], | n | 28 | "groups": [ |
29 | { | ||||
30 | "description": "Inland water features, drainage systems and | ||||
31 | their characteristics. Examples of data you can find here include | ||||
32 | river and lake data, water quality data. \r\n\r\nIn CEOS, related | ||||
33 | research themes include biogeochemistry, Inland lakes and waters, | ||||
34 | modelling, remote sensing and technology, trace metals and | ||||
35 | contaminants.", | ||||
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40 | "name": "freshwater", | ||||
41 | "title": "Freshwater" | ||||
42 | }, | ||||
43 | { | ||||
44 | "description": "Image: \"Earth from Space\" by NASA Goddard | ||||
45 | Photo and Video is licensed under CC BY 2.0", | ||||
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31 | "keywords": "Freshwater quality", | 56 | "keywords": "Freshwater quality", | ||
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38 | "metadata_created": "2022-03-07T19:00:10.419801", | 63 | "metadata_created": "2022-03-07T19:00:10.419801", | ||
n | 39 | "metadata_modified": "2022-03-07T19:10:19.106629", | n | 64 | "metadata_modified": "2022-03-07T19:12:19.832750", |
40 | "name": "netlib-marsh-reports", | 65 | "name": "netlib-marsh-reports", | ||
41 | "notes": "Phase II report: A time series analysis based on landsat | 66 | "notes": "Phase II report: A time series analysis based on landsat | ||
42 | imagery.", | 67 | imagery.", | ||
43 | "num_resources": 1, | 68 | "num_resources": 1, | ||
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45 | "organization": { | 70 | "organization": { | ||
46 | "approval_status": "approved", | 71 | "approval_status": "approved", | ||
47 | "created": "2017-07-21T13:16:09.653452", | 72 | "created": "2017-07-21T13:16:09.653452", | ||
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52 | "name": "nlm", | 77 | "name": "nlm", | ||
53 | "state": "active", | 78 | "state": "active", | ||
54 | "title": "Netley-Libeau Marsh", | 79 | "title": "Netley-Libeau Marsh", | ||
55 | "type": "organization" | 80 | "type": "organization" | ||
56 | }, | 81 | }, | ||
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69 | ], | 94 | ], | ||
70 | "related_datasets": "[]", | 95 | "related_datasets": "[]", | ||
71 | "related_programs": "[]", | 96 | "related_programs": "[]", | ||
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75 | { | 100 | { | ||
76 | "cache_last_updated": null, | 101 | "cache_last_updated": null, | ||
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78 | "created": "2022-03-07T19:02:32.040051", | 103 | "created": "2022-03-07T19:02:32.040051", | ||
79 | "datastore_active": false, | 104 | "datastore_active": false, | ||
80 | "datastore_contains_all_records_of_source_file": false, | 105 | "datastore_contains_all_records_of_source_file": false, | ||
81 | "description": "Netley-Libau Marsh, the largest coastal wetland | 106 | "description": "Netley-Libau Marsh, the largest coastal wetland | ||
82 | adjoining Lake Winnipeg, has been mapped by aerial\r\nphotography in | 107 | adjoining Lake Winnipeg, has been mapped by aerial\r\nphotography in | ||
83 | the past (Grosshans et al 2004; Verbiwski 1986), indicating a trend of | 108 | the past (Grosshans et al 2004; Verbiwski 1986), indicating a trend of | ||
84 | vegetation loss, but\r\na lack of historic aerial photography has | 109 | vegetation loss, but\r\na lack of historic aerial photography has | ||
85 | limited mapping efforts to sporadic intervals. Satellite | 110 | limited mapping efforts to sporadic intervals. Satellite | ||
86 | imagery,\r\nthough of a coarser spatial resolution, has the advantage | 111 | imagery,\r\nthough of a coarser spatial resolution, has the advantage | ||
87 | of high temporal and spectral resolution. Using\r\nLandsat images and | 112 | of high temporal and spectral resolution. Using\r\nLandsat images and | ||
88 | a methodology developed in an earlier phase of this study (Watchorn | 113 | a methodology developed in an earlier phase of this study (Watchorn | ||
89 | 2014), a time\r\nseries of classified vegetation cover maps was | 114 | 2014), a time\r\nseries of classified vegetation cover maps was | ||
90 | produced for twelve years between 1990 and 2013. Water\r\ncover maps | 115 | produced for twelve years between 1990 and 2013. Water\r\ncover maps | ||
91 | were produced for another eight years within this interval, resulting | 116 | were produced for another eight years within this interval, resulting | ||
92 | in a time series\r\nrepresenting 20 years of this 23-year period. This | 117 | in a time series\r\nrepresenting 20 years of this 23-year period. This | ||
93 | time series allowed for an investigation into\r\nrelationships between | 118 | time series allowed for an investigation into\r\nrelationships between | ||
94 | the extent and distribution of Netley\u2019s vegetation community to | 119 | the extent and distribution of Netley\u2019s vegetation community to | ||
95 | underlying\r\nhydrological factors on adjoining Lake Winnipeg and the | 120 | underlying\r\nhydrological factors on adjoining Lake Winnipeg and the | ||
96 | Red River, which can be used to guide future\r\nmarsh remediation | 121 | Red River, which can be used to guide future\r\nmarsh remediation | ||
97 | measures.\r\nThe analysis of this time series indicates that the | 122 | measures.\r\nThe analysis of this time series indicates that the | ||
98 | long-term trend of vegetation loss in Netley-Libau Marsh\r\nhas not | 123 | long-term trend of vegetation loss in Netley-Libau Marsh\r\nhas not | ||
99 | been steady, nor has it been unidirectional. Observed vegetation | 124 | been steady, nor has it been unidirectional. Observed vegetation | ||
100 | change \u2013 both loss and gain \u2013\r\nwas characterised by sudden | 125 | change \u2013 both loss and gain \u2013\r\nwas characterised by sudden | ||
101 | dramatic changes disrupting periods of relative stasis. Lake Winnipeg | 126 | dramatic changes disrupting periods of relative stasis. Lake Winnipeg | ||
102 | water\r\nlevel was identified as the major factor responsible for | 127 | water\r\nlevel was identified as the major factor responsible for | ||
103 | shifting the balance between emergent wetland\r\nvegetation and open | 128 | shifting the balance between emergent wetland\r\nvegetation and open | ||
104 | water. Periods of low water as short as one year had dramatic and | 129 | water. Periods of low water as short as one year had dramatic and | ||
105 | persistent effects\r\non emergent vegetation cover, particularly in | 130 | persistent effects\r\non emergent vegetation cover, particularly in | ||
106 | smaller lakes. Regenerated emergent vegetation was less\r\npersistent | 131 | smaller lakes. Regenerated emergent vegetation was less\r\npersistent | ||
107 | in the large Netley Lake, suggesting that marsh bathymetry is dynamic. | 132 | in the large Netley Lake, suggesting that marsh bathymetry is dynamic. | ||
108 | This study also\r\nidentified that Lake Winnipeg water level and Red | 133 | This study also\r\nidentified that Lake Winnipeg water level and Red | ||
109 | River flow are both contributing factors which influence\r\nthe extent | 134 | River flow are both contributing factors which influence\r\nthe extent | ||
110 | of wet meadows around Netley-Libau Marsh. Decreased river discharges | 135 | of wet meadows around Netley-Libau Marsh. Decreased river discharges | ||
111 | and lake levels were\r\ncorrelated with increasing use of these | 136 | and lake levels were\r\ncorrelated with increasing use of these | ||
112 | regions as hayed or cultivated land. Finally, the interpretation | 137 | regions as hayed or cultivated land. Finally, the interpretation | ||
113 | of\r\nthe cover map time series indicates the connectivity between the | 138 | of\r\nthe cover map time series indicates the connectivity between the | ||
114 | marsh lakes and Lake Winnipeg has\r\nvaried and is presently | 139 | marsh lakes and Lake Winnipeg has\r\nvaried and is presently | ||
115 | increasing. ", | 140 | increasing. ", | ||
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