coupling slope–area analysis, integral approach and statistic tests to steady-state bedrock river profile analysis
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ID: 227716
2017
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Abstract
Slope–area analysis and the integral approach have both
been widely used in stream profile analysis. The former is better at
identifying changes in concavity indices but produces stream power
parameters with high uncertainties relative to the integral approach. The
latter is much better for calculating channel steepness. Limited work has
been done to couple the advantages of the two methods and to remedy such
drawbacks. Here we show the merit of the log-transformed slope–area plot to
determine changes in concavities and then to identify colluvial, bedrock and
alluvial channels along river profiles. Via the integral approach, we obtain
bedrock channel concavity and steepness with high precision. In addition, we
run bivariant linear regression statistic tests for the two methods to
examine and eliminate serially correlated residuals because they may bias
both the estimated value and the precision of stream power parameters. We
finally suggest that the coupled process, integrating the advantages of
both slope–area analysis and the integral approach, can be a more robust and
capable method for bedrock river profile analysis.
| Reference Key |
wang2017earthcoupling
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|---|---|
| Authors | ;Y. Wang;H. Zhang;D. Zheng;J. Yu;J. Pang;Y. Ma |
| Journal | experimental gerontology |
| Year | 2017 |
| DOI |
10.5194/esurf-5-145-2017
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| URL | |
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