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Water 2016, 8(2), 61; doi:10.3390/w8020061

Sinuosity-Driven Water Pressure Distribution on Slope of Slightly-Curved Riparian Zone: Analytical Solution Based on Small-disturbance Theory and Comparison to Experiments

1,* , 1,†
,
2,†
,
1,†
,
1,†
,
1,†
and
3,†
1
College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
2
China Institute of Water Resources and Hydropower Research, Beijing 100038, China
3
Research on Biological Systems and Geomatics Laboratory, University of Mascara, Mascara 29000, Algeria
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Thorsten Stoesser and Roger A Falconer
Received: 17 December 2015 / Revised: 4 February 2016 / Accepted: 5 February 2016 / Published: 17 February 2016
(This article belongs to the Special Issue Recent Advances in Riverflow Research)
View Full-Text   |   Download PDF [1099 KB, uploaded 17 February 2016]   |  

Abstract

A curved riparian zone can create highly complex flow patterns that have a great effect on erosion, pollutant transport, surface water-groundwater exchange and habitat qualities. The small-disturbance theory has been applied to derive the analytical solutions of pressure distributions along a sinusoidal riverbank. Experiments have also been performed to test the hydrodynamic and geomorphic effects on pressure distribution and to verify the applicability of the derived expressions. The derived expressions were simple, accurate and agreed remarkably well with experimental results for the riparian banks with a low degree of curvature. On the contrary, when a riparian bank had a high degree of curvature, these expressions applying the approach of small-disturbance, could not effectively estimate the pressure distributions for a complex bank boundary or complex flow conditions. Moreover, sensitive analysis has indicated that the disturbed pressures along the riparian banks increased with increasing Froude number Fr, as well as the ratio of bank amplitude to wavelength a/λ. However, a/λ has been found to have more significant influence on pressure variation in subcritical flow. View Full-Text
Keywords: riparian zone; slightly-curved; water pressure distribution; small-disturbance theory riparian zone; slightly-curved; water pressure distribution; small-disturbance theory
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xia, J.; Yu, G.; Lin, J.; Cao, W.; Yi, Z.; Lin, L.; Nehal, L. Sinuosity-Driven Water Pressure Distribution on Slope of Slightly-Curved Riparian Zone: Analytical Solution Based on Small-disturbance Theory and Comparison to Experiments. Water 2016, 8, 61.

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