the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Distributed model of hydrological and sediment transport processes in large river basins in Southeast Asia
Abstract. Soil erosion and sediment transport have been modeled at several spatial and temporal scales, yet few models have been reported for large river basins (e.g., drainage areas > 100 000 km2). In this study, we propose a process-based distributed model for assessment of sediment transport at a large basin scale. A distributed hydrological model was coupled with a process-based distributed sediment transport model describing soil erosion and sedimentary processes at hillslope units and channels. The model was tested on two large river basins: the Chao Phraya River Basin (drainage area: 160 000 km2) and the Mekong River Basin (795 000 km2). The simulation over 10 years showed good agreement with the observed suspended sediment load in both basins. The average Nash–Sutcliffe efficiency (NSE) and average correlation coefficient (r) between the simulated and observed suspended sediment loads were 0.62 and 0.61, respectively, in the Chao Phraya River Basin except the lowland section. In the Mekong River Basin, the overall average NSE and r were 0.60 and 0.78, respectively. Sensitivity analysis indicated that suspended sediment load is sensitive to detachability by raindrop (k) in the Chao Phraya River Basin and to soil detachability over land (Kf) in the Mekong River Basin. Overall, the results suggest that the present model can be used to understand and simulate erosion and sediment transport in large river basins.
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RC C3182: 'Reviewer comment', Anonymous Referee #1, 21 Aug 2015
- AC C4177: 'Reply comment for referee 1', SUIF ZULIZIANA, 09 Oct 2015
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RC C3238: ''Reviewer comments', Anonymous Referee #2, 23 Aug 2015', Anonymous Referee #2, 23 Aug 2015
- AC C4181: 'Reply comments for referee 2', SUIF ZULIZIANA, 09 Oct 2015
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RC C3182: 'Reviewer comment', Anonymous Referee #1, 21 Aug 2015
- AC C4177: 'Reply comment for referee 1', SUIF ZULIZIANA, 09 Oct 2015
-
RC C3238: ''Reviewer comments', Anonymous Referee #2, 23 Aug 2015', Anonymous Referee #2, 23 Aug 2015
- AC C4181: 'Reply comments for referee 2', SUIF ZULIZIANA, 09 Oct 2015
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Cited
4 citations as recorded by crossref.
- Multivariate interpolation and information entropy for optimizing raingauge network in the Mekong River Basin S. Li et al. 10.1080/02626667.2019.1646426
- Sediment dynamics and temporal variation of runoff in the Yom River, Thailand M. Namsai et al. 10.1016/j.ijsrc.2020.03.002
- Influences of tropical monsoon climatology on the delivery and dispersal of organic carbon over the Upper Gulf of Thailand B. Wu et al. 10.1016/j.margeo.2020.106209
- Empirical Sediment Transport Models Based on Indoor Rainfall Simulator and Erosion Flume Experimental Data H. Aksoy et al. 10.1002/ldr.2555