Estimates of present-day erosion based on sediment transport in rivers: a case study in Taiwan |
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| Authors: | Fung-Chun Li Jacques Angelier Rou-Fei Chen Hui-Ming Hsieh Benoît Deffontaines Ching-Ruey Luo Tso-Tchang Wu Ming-Chao Lin |
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| Institution: | 1. Department of Computer aided media design, Chang Jung Christian University, 396, Sec. 1, Chang Jung Rd., Kway Jen, Tainan 711, Taiwan;2. Observatoire océanologique de Villefranche-sur-Mer, université Pierre-et-Marie-Curie, Géosciences Azur, Port de la Darse, BP 48, 06235 Villefranche-sur-Mer cedex, France;3. Institut universitaire de France, 103, bd Saint-Michel, 75005 Paris, France;4. Department of Information Management, Diwan College of Management, No. 87–1, Nanshai Li, Madou Jen, Tainan, Taiwan;5. Laboratoire de géomorphologie, École pratique des hautes études, 15, bd de la Mer, 35800 Dinard, France;6. Department of Nature Sciences Education, National Tainan Teachers College, 33, Sec. 2, Sulin St., Tainan, Taiwan;7. Department of Earth Sciences, National Taiwan Normal University, 162, HoPing E. Road, Sec. 1, Taipei, Taiwan |
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| Abstract: | We discuss the present-day sediment transport by rivers, and hence the erosion rate in upstream basins, based on the example of Taiwan Rivers where large datasets are available. After data correction, the values of the suspended sediment load in the lower Kaoping River are nearly three times smaller than those from the literature. On the other hand, we add the bed load evaluated from numerical modelling, despite limitations from data and models. Whereas the contribution of the chemical denudation rate in Taiwan is minor, the bed load is significant and must be evaluated. We point out that biases in data collection may favour high values of suspended load data, and that large series of datasets are needed to reduce uncertainties and smooth the time variability effect. To cite this article: F.-C. Li et al., C. R. Geoscience 337 (2005). |
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| Keywords: | River Erosion Sediment Suspended load Bed load Denudation rate Hydrological stations Taiwan Rivière Érosion Sédiment Charge en suspension Charge de fond Taux de dénudation Stations hydrologiques Taiwan |
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