Abstract
While the grain-sorting morphodynamics of gravel- and sand-bed rivers has been intensively studied, sand-silt bed rivers such as the Lower Yellow River (LYR), China and the Pilcomayo River, Paraguay/Argentina have received much less attention. As a first step, we use a database from the LYR in the 1980s to develop a grain size specific extended Engelund–Hansen total bed material load relation. We then use this relation in two morphodynamic calculations. First, we “spin-up” the calculation from an arbitrary bed slope over 600 years to reproduce the downstream fining observed before the closing of Xiaolangdi Dam in 2000. We then cut off the sediment supply, and reproduce the observed pattern of bed coarsening as the bed armours in response to degradation. We argue that our model is likely not site-specific, but applies to other sand-silt bed rivers, basic data for which is as yet lacking.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 770-785 |
| Number of pages | 16 |
| Journal | Journal of Hydraulic Research |
| Volume | 57 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 2 2019 |
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Keywords
- Fluvial geomorphology
- morphodynamics and channel form
- river channels
- sediment transport
- suspended sediment
ASJC Scopus subject areas
- Civil and Structural Engineering
- Water Science and Technology
Cite this
Extended Engelund–Hansen type sediment transport relation for mixtures based on the sand-silt-bed Lower Yellow River, China. / Naito, Kensuke; Ma, Hongbo; Nittrouer, Jeffrey A.; Zhang, Yuanfeng; Wu, Baosheng; Wang, Yuanjian; Fu, Xudong; Parker, Gary.
In: Journal of Hydraulic Research, Vol. 57, No. 6, 02.11.2019, p. 770-785.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Extended Engelund–Hansen type sediment transport relation for mixtures based on the sand-silt-bed Lower Yellow River, China
AU - Naito, Kensuke
AU - Ma, Hongbo
AU - Nittrouer, Jeffrey A.
AU - Zhang, Yuanfeng
AU - Wu, Baosheng
AU - Wang, Yuanjian
AU - Fu, Xudong
AU - Parker, Gary
PY - 2019/11/2
Y1 - 2019/11/2
N2 - While the grain-sorting morphodynamics of gravel- and sand-bed rivers has been intensively studied, sand-silt bed rivers such as the Lower Yellow River (LYR), China and the Pilcomayo River, Paraguay/Argentina have received much less attention. As a first step, we use a database from the LYR in the 1980s to develop a grain size specific extended Engelund–Hansen total bed material load relation. We then use this relation in two morphodynamic calculations. First, we “spin-up” the calculation from an arbitrary bed slope over 600 years to reproduce the downstream fining observed before the closing of Xiaolangdi Dam in 2000. We then cut off the sediment supply, and reproduce the observed pattern of bed coarsening as the bed armours in response to degradation. We argue that our model is likely not site-specific, but applies to other sand-silt bed rivers, basic data for which is as yet lacking.
AB - While the grain-sorting morphodynamics of gravel- and sand-bed rivers has been intensively studied, sand-silt bed rivers such as the Lower Yellow River (LYR), China and the Pilcomayo River, Paraguay/Argentina have received much less attention. As a first step, we use a database from the LYR in the 1980s to develop a grain size specific extended Engelund–Hansen total bed material load relation. We then use this relation in two morphodynamic calculations. First, we “spin-up” the calculation from an arbitrary bed slope over 600 years to reproduce the downstream fining observed before the closing of Xiaolangdi Dam in 2000. We then cut off the sediment supply, and reproduce the observed pattern of bed coarsening as the bed armours in response to degradation. We argue that our model is likely not site-specific, but applies to other sand-silt bed rivers, basic data for which is as yet lacking.
KW - Fluvial geomorphology
KW - morphodynamics and channel form
KW - river channels
KW - sediment transport
KW - suspended sediment
UR - http://www.scopus.com/inward/record.url?scp=85060469095&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060469095&partnerID=8YFLogxK
U2 - 10.1080/00221686.2018.1555554
DO - 10.1080/00221686.2018.1555554
M3 - Article
AN - SCOPUS:85060469095
VL - 57
SP - 770
EP - 785
JO - Journal of Hydraulic Research
JF - Journal of Hydraulic Research
SN - 0022-1686
IS - 6
ER -