Coupling threshold theory and satellite-derived channel width to estimate the formative discharge of Himalayan foreland rivers
<p>We propose an innovative methodology to estimate the formative discharge of alluvial rivers from remote sensing images. This procedure involves automatic extraction of the width of a channel from Landsat Thematic Mapper, Landsat 8, and Sentinel-1 satellite images. We translate the channel w...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-02-01
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| Series: | Earth Surface Dynamics |
| Online Access: | https://esurf.copernicus.org/articles/9/47/2021/esurf-9-47-2021.pdf |
| _version_ | 1819115829441069056 |
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| author | K. Gaurav F. Métivier A V Sreejith R. Sinha A. Kumar S. K. Tandon |
| author_facet | K. Gaurav F. Métivier A V Sreejith R. Sinha A. Kumar S. K. Tandon |
| author_sort | K. Gaurav |
| collection | DOAJ |
| description | <p>We propose an innovative methodology to estimate the formative discharge of alluvial rivers from remote sensing images. This procedure involves automatic extraction of the width of a channel from Landsat Thematic Mapper, Landsat 8, and Sentinel-1 satellite images. We translate the channel width extracted from satellite images to discharge using a width–discharge regime curve established previously by us for the Himalayan rivers. This regime curve is based on the threshold theory, a simple physical force balance that explains the first-order geometry of alluvial channels. Using this procedure, we estimate the formative discharge of six major rivers of the Himalayan foreland: the Brahmaputra, Chenab, Ganga, Indus, Kosi, and Teesta rivers. Except highly regulated rivers (Indus and Chenab), our estimates of the discharge from satellite images can be compared with the mean annual discharge obtained from historical records of gauging stations. We have shown that this procedure applies both to braided and single-thread rivers over a large territory. Furthermore, our methodology to estimate discharge from remote sensing images does not rely on continuous ground calibration.</p> |
| first_indexed | 2024-12-22T05:07:25Z |
| format | Article |
| id | doaj.art-3ea09606bc374e17a7383210230093fe |
| institution | Directory Open Access Journal |
| issn | 2196-6311 2196-632X |
| language | English |
| last_indexed | 2024-12-22T05:07:25Z |
| publishDate | 2021-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth Surface Dynamics |
| spelling | doaj.art-3ea09606bc374e17a7383210230093fe2022-12-21T18:38:04ZengCopernicus PublicationsEarth Surface Dynamics2196-63112196-632X2021-02-019477010.5194/esurf-9-47-2021Coupling threshold theory and satellite-derived channel width to estimate the formative discharge of Himalayan foreland riversK. Gaurav0F. Métivier1A V Sreejith2R. Sinha3A. Kumar4S. K. Tandon5Indian Institute of Science Education and Research, Bhopal, Madhya Pradesh 462066, IndiaInstitute de Physique du Globe de Paris, 1 Rue Jussieu, 75005 Paris CEDEX 05, FranceSchool of Mathematics and Computer Science, Indian Institute of Technology, Ponda 403401, Goa, IndiaDepartment of Earth Sciences, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, IndiaIndian Institute of Science Education and Research, Bhopal, Madhya Pradesh 462066, IndiaIndian Institute of Science Education and Research, Bhopal, Madhya Pradesh 462066, India<p>We propose an innovative methodology to estimate the formative discharge of alluvial rivers from remote sensing images. This procedure involves automatic extraction of the width of a channel from Landsat Thematic Mapper, Landsat 8, and Sentinel-1 satellite images. We translate the channel width extracted from satellite images to discharge using a width–discharge regime curve established previously by us for the Himalayan rivers. This regime curve is based on the threshold theory, a simple physical force balance that explains the first-order geometry of alluvial channels. Using this procedure, we estimate the formative discharge of six major rivers of the Himalayan foreland: the Brahmaputra, Chenab, Ganga, Indus, Kosi, and Teesta rivers. Except highly regulated rivers (Indus and Chenab), our estimates of the discharge from satellite images can be compared with the mean annual discharge obtained from historical records of gauging stations. We have shown that this procedure applies both to braided and single-thread rivers over a large territory. Furthermore, our methodology to estimate discharge from remote sensing images does not rely on continuous ground calibration.</p>https://esurf.copernicus.org/articles/9/47/2021/esurf-9-47-2021.pdf |
| spellingShingle | K. Gaurav F. Métivier A V Sreejith R. Sinha A. Kumar S. K. Tandon Coupling threshold theory and satellite-derived channel width to estimate the formative discharge of Himalayan foreland rivers Earth Surface Dynamics |
| title | Coupling threshold theory and satellite-derived channel width to estimate the formative discharge of Himalayan foreland rivers |
| title_full | Coupling threshold theory and satellite-derived channel width to estimate the formative discharge of Himalayan foreland rivers |
| title_fullStr | Coupling threshold theory and satellite-derived channel width to estimate the formative discharge of Himalayan foreland rivers |
| title_full_unstemmed | Coupling threshold theory and satellite-derived channel width to estimate the formative discharge of Himalayan foreland rivers |
| title_short | Coupling threshold theory and satellite-derived channel width to estimate the formative discharge of Himalayan foreland rivers |
| title_sort | coupling threshold theory and satellite derived channel width to estimate the formative discharge of himalayan foreland rivers |
| url | https://esurf.copernicus.org/articles/9/47/2021/esurf-9-47-2021.pdf |
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