Using Landsat-7 Data to Estimate Suspended Sediment Concentration in the Maumee River Watershed PDF Download
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Author: Mark Emil Seidelmann
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
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Author: Mark Emil Seidelmann
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
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Author: Sweta Bharati
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Author: Donna N. Myers
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Category : Conservation tillage
Languages : en
Pages : 52
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Author: D. E. Burkham
Publisher:
ISBN:
Category : Error analysis (Mathematics)
Languages : en
Pages : 28
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Author: Leonard R. Frost
Publisher:
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Category : Sediment, Suspended
Languages : en
Pages : 50
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Author: J. G. Lyon
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Category :
Languages : en
Pages :
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Author: Jonathan Acero Flores
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Category : River sediments
Languages : en
Pages : 0
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Excessive sediment transport adversely affects the hydrologic regime and water quality of a river and its drainage basin. With the decline of operational gauges monitoring sediments, establishing viable means of quantifying sediment transport is pressingly needed. In this study, I developed an alternative approach to address this issue where I applied the relationships between hydraulic geometry of river channels, river discharge, water-leaving surface reflectance (SR), and suspended sediment concentration (SSC) to quantify sediment discharge with the aid of spacebased observations. I investigated the approach with nine USGS gauging stations along the Upper Mississippi River — an important river system comprising almost half of the entire Mississippi River. I took advantage of the use of recent advances in remote sensing such as RivWidthCloud, Bayesian discharge inference coupled with at-many-stations hydraulic geometry (AMHG), and SSC-SR retrieval models. I examined 5,490 Landsat scenes to estimate the water discharge, SSC levels, and sediment discharge at nine locations along the Upper Mississippi River. Results showed that RivWidthCloud can be effectively used for Bayesian-AMHG discharge inference while the relationships between the SSC and Landsat SR are statistically significant at significance level [alpha] = 0.01 for all the study sites except in Clinton, IA. Acceptable gauge-specific SSC-SR model was obtained in the downstream having coefficients of determination R2 > 0.50. Similarly, acceptable regional-scale model was developed with R = 0.50. Further, results suggest that the three study sites at St. Louis, MO, Chester, IL, and Thebes, IL, in the downstream portion of the river, were the best locations for Q and SSC estimation with Landsat imagery. Estimations of Q were sensitive to the center of Q prior, which induces bias when inadequately estimated. Relatively, estimations of SSC were likely influenced by low reflectance of sediments during low flows due to chlorophyll and algae mixing in the water column. Lastly, I established in this study that combining the discharge and SSC retrieval from Landsat imagery can yield reasonable sediment discharge estimates having an average relative bias of 0.23, RRMSE of 0.95, and NSE of 0.40 for certain river segments in the Upper Mississippi River.
Author: John J. Ingram
Publisher:
ISBN:
Category : Sediment transport
Languages : en
Pages : 142
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A procedure for measuring total sediment discharge using point-source suspended-sediment data was developed. The proposed procedure, TSL (Total Sediment Load), was tested with field data from the Niobrara River at Cody, NE; Fivemile Creek at Shoshoni, WY; the Middle Loup River near Dunning, NE; the Rio Grande Conveyance channel near Bernardo, NM; and Goodwin Creek near Oxford, MS. The TSL procedure was compared to the modified Einstein procedure (MEP), which uses depth-integrated suspended-sediment data for measuring total sediment discharge. The TSL procedure provides total sediment load measurements that are similar in magnitude to both turbulence flume measurements of total sediment load and MEP measurements. The similarity in results for the TSL procedure, the total sediment load measurements, and the MEP demonstrate the use of the TSL procedure as an alternative to depth integrated suspended-sediment sampling. Results of the TSL procedure are more reliable when the point suspended-sediment samples are collected in the lower flow depth. The TSL procedure was tested and found to be reliable using point samples collected in the lower 20 to 45 percent flow depth. The assessments of the reviewed data sets highlight advantages for selecting the TSL procedure over the MEP: realistic sediment load measurements, greater control in obtaining suspended-sediment samples, automatic sampling, the collection of near-continuous measurements, and time integration for determining the true sediment transport. Also, the use of point-source suspended-sediment samples requires less time in the field and lower sediment sampling costs. (fr).
Author: Giuliana Profeti
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Author: Hans Middelkoop
Publisher:
ISBN:
Category :
Languages : en
Pages : 31
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