Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques
We investigated spatial and temporal migration of the Solimões, the Japurá, and the Aranapu River channels in western Brazilian Amazonia with Landsat TM imagery over a 21-year period. Additionally, we classified and monitored how channel migrations affect the distribution of pioneer vegetation and o...
| Autor principal: | Peixoto, Juliana Maerschner Aguiar |
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| Outros Autores: | Nelson, Bruce Walker, Wittmann, Florian Karl |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Remote Sensing of Environment
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18408 |
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oai:repositorio:1-18408 |
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oai:repositorio:1-18408 Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques Peixoto, Juliana Maerschner Aguiar Nelson, Bruce Walker Wittmann, Florian Karl Alluvial Geomorphology Annual Rates Brazilian Amazonia C-sequestration Cecropia Forest Central Amazon Basin Channel Migration Flood-plains Free Channels Landsat Tm Local Biomass Old-growth Forest Open Water Point Bar River Channels River Confluence Sediment Loads Sensing Techniques Study Areas Study Sites Temporal Dynamics Vegetation Type Water Discharges Biomass Forestry Geomorphology Remote Sensing Vegetation Wetlands Rivers Alluvial Deposit Biomass Carbon Sequestration Channel Flow Colonization Floodplain Geomorphology Landsat Oil Trade Old-growth Forest Pioneer Species Remote Sensing River Discharge Spatial Variation Temporal Variation Vegetation Dynamics Wetland Basins Biomass Carbon Cecropia Chelation Forestry Mapping Plants Remote Sensing Rivers Wetlands Amazonia Brasil South America Cecropia We investigated spatial and temporal migration of the Solimões, the Japurá, and the Aranapu River channels in western Brazilian Amazonia with Landsat TM imagery over a 21-year period. Additionally, we classified and monitored how channel migrations affect the distribution of pioneer vegetation and old-growth forest. The cloud-free study area was 153,032 ha - open water plus 3 km inland on each margin. The channel migration rates, expressed as percent dislocation of the open water body of the river year- 1, were lowest in the Japurá River (1.2%), and highest in the Aranapu channel (2.5%), the point bars at river confluence being the most affected landforms subject to geomorphic changes. Annual rates of lateral erosion and accretion of vegetated land along the three rivers were well-balanced. They averaged 0.79 and 0.83% of the cloud-free channel area over the 21 years. The Solimões River was more dynamic than the Japurá River, which can be traced to higher water discharge and sediment load. During the 21 years, the area covered by pioneer vegetation increased by 5.8% of the study area, while late-succession areas decreased by a similar amount (5.5%). According to local biomass estimates of the different vegetation types, these values suggest that C-releases by alluvial erosion would be much higher than C-sequestration caused by the creation of areas suitable for colonization by pioneer vegetation at our study site. © 2009 Elsevier Inc. All rights reserved. 2020-06-15T21:54:37Z 2020-06-15T21:54:37Z 2009 Artigo https://repositorio.inpa.gov.br/handle/1/18408 10.1016/j.rse.2009.06.015 en Volume 113, Número 10, Pags. 2258-2266 Restrito Remote Sensing of Environment |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Alluvial Geomorphology Annual Rates Brazilian Amazonia C-sequestration Cecropia Forest Central Amazon Basin Channel Migration Flood-plains Free Channels Landsat Tm Local Biomass Old-growth Forest Open Water Point Bar River Channels River Confluence Sediment Loads Sensing Techniques Study Areas Study Sites Temporal Dynamics Vegetation Type Water Discharges Biomass Forestry Geomorphology Remote Sensing Vegetation Wetlands Rivers Alluvial Deposit Biomass Carbon Sequestration Channel Flow Colonization Floodplain Geomorphology Landsat Oil Trade Old-growth Forest Pioneer Species Remote Sensing River Discharge Spatial Variation Temporal Variation Vegetation Dynamics Wetland Basins Biomass Carbon Cecropia Chelation Forestry Mapping Plants Remote Sensing Rivers Wetlands Amazonia Brasil South America Cecropia |
| spellingShingle |
Alluvial Geomorphology Annual Rates Brazilian Amazonia C-sequestration Cecropia Forest Central Amazon Basin Channel Migration Flood-plains Free Channels Landsat Tm Local Biomass Old-growth Forest Open Water Point Bar River Channels River Confluence Sediment Loads Sensing Techniques Study Areas Study Sites Temporal Dynamics Vegetation Type Water Discharges Biomass Forestry Geomorphology Remote Sensing Vegetation Wetlands Rivers Alluvial Deposit Biomass Carbon Sequestration Channel Flow Colonization Floodplain Geomorphology Landsat Oil Trade Old-growth Forest Pioneer Species Remote Sensing River Discharge Spatial Variation Temporal Variation Vegetation Dynamics Wetland Basins Biomass Carbon Cecropia Chelation Forestry Mapping Plants Remote Sensing Rivers Wetlands Amazonia Brasil South America Cecropia Peixoto, Juliana Maerschner Aguiar Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques |
| topic_facet |
Alluvial Geomorphology Annual Rates Brazilian Amazonia C-sequestration Cecropia Forest Central Amazon Basin Channel Migration Flood-plains Free Channels Landsat Tm Local Biomass Old-growth Forest Open Water Point Bar River Channels River Confluence Sediment Loads Sensing Techniques Study Areas Study Sites Temporal Dynamics Vegetation Type Water Discharges Biomass Forestry Geomorphology Remote Sensing Vegetation Wetlands Rivers Alluvial Deposit Biomass Carbon Sequestration Channel Flow Colonization Floodplain Geomorphology Landsat Oil Trade Old-growth Forest Pioneer Species Remote Sensing River Discharge Spatial Variation Temporal Variation Vegetation Dynamics Wetland Basins Biomass Carbon Cecropia Chelation Forestry Mapping Plants Remote Sensing Rivers Wetlands Amazonia Brasil South America Cecropia |
| description |
We investigated spatial and temporal migration of the Solimões, the Japurá, and the Aranapu River channels in western Brazilian Amazonia with Landsat TM imagery over a 21-year period. Additionally, we classified and monitored how channel migrations affect the distribution of pioneer vegetation and old-growth forest. The cloud-free study area was 153,032 ha - open water plus 3 km inland on each margin. The channel migration rates, expressed as percent dislocation of the open water body of the river year- 1, were lowest in the Japurá River (1.2%), and highest in the Aranapu channel (2.5%), the point bars at river confluence being the most affected landforms subject to geomorphic changes. Annual rates of lateral erosion and accretion of vegetated land along the three rivers were well-balanced. They averaged 0.79 and 0.83% of the cloud-free channel area over the 21 years. The Solimões River was more dynamic than the Japurá River, which can be traced to higher water discharge and sediment load. During the 21 years, the area covered by pioneer vegetation increased by 5.8% of the study area, while late-succession areas decreased by a similar amount (5.5%). According to local biomass estimates of the different vegetation types, these values suggest that C-releases by alluvial erosion would be much higher than C-sequestration caused by the creation of areas suitable for colonization by pioneer vegetation at our study site. © 2009 Elsevier Inc. All rights reserved. |
| format |
Artigo |
| author |
Peixoto, Juliana Maerschner Aguiar |
| author2 |
Nelson, Bruce Walker Wittmann, Florian Karl |
| author2Str |
Nelson, Bruce Walker Wittmann, Florian Karl |
| title |
Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques |
| title_short |
Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques |
| title_full |
Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques |
| title_fullStr |
Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques |
| title_full_unstemmed |
Spatial and temporal dynamics of river channel migration and vegetation in central Amazonian white-water floodplains by remote-sensing techniques |
| title_sort |
spatial and temporal dynamics of river channel migration and vegetation in central amazonian white-water floodplains by remote-sensing techniques |
| publisher |
Remote Sensing of Environment |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18408 |
| _version_ |
1787144726004105216 |
| score |
11.653393 |