Articles | Volume 13, issue 4
https://doi.org/10.5194/esurf-13-531-2025
https://doi.org/10.5194/esurf-13-531-2025
Research article
 | 
08 Jul 2025
Research article |  | 08 Jul 2025

Sediment aggradation rates in Himalayan rivers revealed through the InSAR differential residual topographic phase

Jingqiu Huang and Hugh D. Sinclair

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Cited articles

Allen, P. A., Armitage, J. J., Carter, A., Duller, R. A., Michael, N. A., Sinclair, H. D., Whitchurch, A. L., and Whittaker, A. C.: The Qs problem: Sediment volumetric balance of proximal foreland basin systems, Sedimentology, 60, 102–130, 2013. 
Asselman, N. E., Middelkoop, H., and Van Dijk, P. M.: The impact of changes in climate and land use on soil erosion, transport and deposition of suspended sediment in the River Rhine, Hydrol. Process., 17, 3225–3244, 2003. 
Berardino, P., Fornaro, G., Lanari, R., and Sansosti, E.: A new algorithm for surface deformation monitoring based on small baseline differential SAR interferograms, IEEE T. Geosci. Remote Sens., 40, 2375–2383, 2002. 
Bombrun, L., Gay, M., Trouvé, E., Vasile, G., and Mars, J.: DEM error retrieval by analyzing time series of differential interferograms, IEEE Geosci. Remote Sens. Lett., 6, 830–834, 2009. 
Bull, W. B.: The alluvial-fan environment, Prog. Phys. Geogr., 1, 222–270, 1977. 
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Short summary
We develop a novel approach based on satellite radar images to quantify millimetre-scale sedimentation during monsoon floods over a 15 km stretch of four rivers, from the Himalayan mountain front to the gravel–sand transition. The results show how sediment accumulates more rapidly near the mountain front and decreases downstream, while the floodplain sinks. This method can improve river monitoring, enhance flood prediction, and benefit communities at risk of flooding in Nepal and India. 
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