Estimation of river discharge, propagation speed and hydraulic geometry from space
of Lena River effective width (We) display a high predictive capacity (r 2 = 0.81, mean absolute error < 25%) to forecast downstream discharge conditions at Kusur station, some 8 d and 700 km later. Satellite-derived mean flow propagation speed (88 km d1 or 1.01 m s1) compares well with that esti...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.511.3557 2023-05-15T17:07:39+02:00 Estimation of river discharge, propagation speed and hydraulic geometry from space Laurence C. Smith Tamlin M. Pavelsky The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.511.3557 http://bprc.osu.edu/water/publications/WRR_LenaRiverSpace_SmithPavelsky_2008.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.511.3557 http://bprc.osu.edu/water/publications/WRR_LenaRiverSpace_SmithPavelsky_2008.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://bprc.osu.edu/water/publications/WRR_LenaRiverSpace_SmithPavelsky_2008.pdf text 2008 ftciteseerx 2016-01-08T09:39:31Z of Lena River effective width (We) display a high predictive capacity (r 2 = 0.81, mean absolute error < 25%) to forecast downstream discharge conditions at Kusur station, some 8 d and 700 km later. Satellite-derived mean flow propagation speed (88 km d1 or 1.01 m s1) compares well with that estimated from ground data (84 km d1 or 0.97 m s1). Scaling analysis of a 300 km heavily braided study reach suggests that at length scales> 60–90 km (2–3 time valley width), satellite-derived We Q rating curves and hydraulic geometry (b exponents) converge upon stable values (b = 0.48), indicating transferability of the discharge retrieval method between different locations. Put another way, at length scales exceeding 60–90 km all subreaches display similar behavior everywhere. At finer reach length scales (e.g., 0.25–1 km), longitudinal extraction of b exponents represents the first continuous mapping of a classical hydraulic geometry parameter from space. While at least one gauging station is required for calibration, results suggest that multitemporal satellite data can powerfully enhance our understanding of water discharge and flow conveyance in remote river systems. Text lena river Unknown |
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of Lena River effective width (We) display a high predictive capacity (r 2 = 0.81, mean absolute error < 25%) to forecast downstream discharge conditions at Kusur station, some 8 d and 700 km later. Satellite-derived mean flow propagation speed (88 km d1 or 1.01 m s1) compares well with that estimated from ground data (84 km d1 or 0.97 m s1). Scaling analysis of a 300 km heavily braided study reach suggests that at length scales> 60–90 km (2–3 time valley width), satellite-derived We Q rating curves and hydraulic geometry (b exponents) converge upon stable values (b = 0.48), indicating transferability of the discharge retrieval method between different locations. Put another way, at length scales exceeding 60–90 km all subreaches display similar behavior everywhere. At finer reach length scales (e.g., 0.25–1 km), longitudinal extraction of b exponents represents the first continuous mapping of a classical hydraulic geometry parameter from space. While at least one gauging station is required for calibration, results suggest that multitemporal satellite data can powerfully enhance our understanding of water discharge and flow conveyance in remote river systems. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Laurence C. Smith Tamlin M. Pavelsky |
spellingShingle |
Laurence C. Smith Tamlin M. Pavelsky Estimation of river discharge, propagation speed and hydraulic geometry from space |
author_facet |
Laurence C. Smith Tamlin M. Pavelsky |
author_sort |
Laurence C. Smith |
title |
Estimation of river discharge, propagation speed and hydraulic geometry from space |
title_short |
Estimation of river discharge, propagation speed and hydraulic geometry from space |
title_full |
Estimation of river discharge, propagation speed and hydraulic geometry from space |
title_fullStr |
Estimation of river discharge, propagation speed and hydraulic geometry from space |
title_full_unstemmed |
Estimation of river discharge, propagation speed and hydraulic geometry from space |
title_sort |
estimation of river discharge, propagation speed and hydraulic geometry from space |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.511.3557 http://bprc.osu.edu/water/publications/WRR_LenaRiverSpace_SmithPavelsky_2008.pdf |
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lena river |
genre_facet |
lena river |
op_source |
http://bprc.osu.edu/water/publications/WRR_LenaRiverSpace_SmithPavelsky_2008.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.511.3557 http://bprc.osu.edu/water/publications/WRR_LenaRiverSpace_SmithPavelsky_2008.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766063127760207872 |