Development of a regional model for catchment-scale suspended sediment yield estimation in ungauged rivers of the Lower Mekong Basin

Heng, Sokchhay; Suetsugi, Tadashi

doi:10.1016/j.geoderma.2014.07.030

Cited by 7 publications

(10 citation statements)

References 48 publications

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“…The sediment in a river system is composed of suspended and bed loads. Suspended sediment is predominant and commonly accounts for approximately 90% of the total yields (Walling and Fang, 2003;Francke et al, 2008;Zhang et al, 2012;Heng and Suetsugi, 2014). Suspended sediment is important for current erosion rate estimation (Jansson, 2002;Pelletier, 2012;Dean et al, 2016), and plays an important role in the transfer of most of the available nutrients and contaminants (Devesa-Rey et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variations of suspended sediment transport in the upstream and midstream of the Yarlung Tsangpo River (the upper Brahmaputra), China

Shi

Zhang

et al. 2017

Earth Surf Processes Landf

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The Yarlung Tsangpo River, which flows from west to east across the southern part of the Tibetan Plateau, is the longest river on the plateau and an important center for human habitation in Tibet. Suspended sediment in the river can be used as an important proxy for evaluating regional soil erosion and ecological and environmental conditions. However, sediment transport in the river is rarely reported due to data scarcity. Results from this study based on a daily dataset of 3 years from four main stream gauging stations confirmed the existence of great spatiotemporal variability in suspended sediment transport in the Yarlung Tsangpo River, under interactions of monsoon climate and topographical variability. Temporally, sediment transport or deposition mainly occurred during the summer months from July to September, accounting for 79% to 93% of annual gross sediment load. This coincided with the rainy season from June to August that accounted for 51% to 80% of annual gross precipitation and the flood period from July to September that accounted for approximately 60% of annual gross discharge. The highest specific sediment yield of 177.6 t/km2/yr occurred in the upper midstream with the highest erosion intensity. The lower midstream was dominated by deposition, trapping approximately 40% of total sediment input from its upstream area. Sediment load transported to the midstream terminus was 10.43 Mt/yr with a basin average specific sediment yield of 54 t/km2/yr. Comparison with other plateau‐originated rivers like the upper Yellow River, the upper Yangtze River, the upper Indus River, and the Mekong River indicated that sediment contribution from the studied area was very low. The results provided fundamental information for future studies on soil and water conservation and for the river basin management. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Spatiotemporal variations of suspended sediment transport in the upstream and midstream of the Yarlung Tsangpo River (the upper Brahmaputra), China

Shi

Zhang

et al. 2017

Earth Surf Processes Landf

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“…Hysteresis is the time lag between the peak discharge (Q) and the peak sediment concentration (SS) (Heng and Suetsugi, 2014), represented by a hysteresis loop. The hysteresis loop indicates the behaviour of the suspended sediment in watercourses as a function of the energy conditions through the discharge of water (Baca, 2008) during rainfall events (Fang et al, 2015).…”

Section: Hysteresis Loopmentioning

confidence: 99%

“…Although sometimes the power function cannot provide an appropriate approximation of the sediment rating curve, most researchers generate it in order to estimate both suspended sediments, namely, concentration and load (i.e., Walling, 1977;Asselman, 2000;Fan et al, 2012;Guzman et al, 2013a;Harrington and Harrington, 2016;Hassan, 2014;Heng and Suetsugi, 2014;Girolamo et al, 2015). Thus, it is worthwhile to consider the physical meaning of both parameters, so that the relationship between the suspended sediment and the discharge can be correctly understood.…”

Section: Hysteresis Loopmentioning

confidence: 99%

“…On the other hand, the wash load consists of the finest particles in the sediment that suspends in water. They are regarded as a non-capacity load and cannot be well predicted by the sediment transport model (Asselman, 2000;Heng and Suetsugi, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Most SRCs tend to underestimate the suspended sediment concentration during high discharge and overestimate it during low discharge (Horowitz, 2003;Boukhrissa et al, 2013). Moreover, the predicted suspended sediment load tends to be more underestimated than the observed suspended sediment load (Asselman, 2000;Heng and Suetsugi, 2014;Girolamo et al, 2015). Although some articles have addressed its limitations, no comprehensive reviews of the SRC have been conducted yet.…”

Section: Introductionmentioning

confidence: 99%

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The Use of Sediment Rating Curve under its Limitations to Estimate the Suspended Load

Hapsari

Onishi

Imaizumi

et al. 2019

RAS

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The suspended sediment load in river water is an important index for the soil erosion rate in the watersheds of designated rivers. Amongst the various methods for estimating the suspended sediment load, the most frequently used one is the sediment rating curve. The sediment rating curve can aid in the understanding of the relationship between the behaviour of the suspended sediment transport and the discharge flow for estimating soil erosion. However, the rating curve tends to underestimate the actual values of both the suspended sediment load and the suspended sediment concentration during high discharge and to overestimate them during low discharge. The aim of the present paper is to confirm how to use the sediment rating curve to estimate soil erosion under its limitations and benefits. The accuracy of sediment rating curve is affected by various factors, including seasons, discharge stages, catchment area, and sampling frequency. In many cases, it cannot be concluded easily that sediment rating curve is the best method to estimate suspended sediment load. At the same time, there is no other method that is simple and commonly used for the estimation of suspended sediment load, as the sediment rating curve. Efforts on the improvement of the sediment rating curve, such as data separation among the seasons and the increasing of sampling frequency, are needed for the better estimation as well as the accuracy of suspended sediment load.

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Suspended sedimentary dynamics under Mediterranean semi-arid environment of Wadi El Maleh watershed, Algeria

Benselama

Hasbaia

Djoukbala

et al. 2021

Model. Earth Syst. Environ.

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Development of a regional model for catchment-scale suspended sediment yield estimation in ungauged rivers of the Lower Mekong Basin

Cited by 7 publications

References 48 publications

Spatiotemporal variations of suspended sediment transport in the upstream and midstream of the Yarlung Tsangpo River (the upper Brahmaputra), China

Spatiotemporal variations of suspended sediment transport in the upstream and midstream of the Yarlung Tsangpo River (the upper Brahmaputra), China

The Use of Sediment Rating Curve under its Limitations to Estimate the Suspended Load

Suspended sedimentary dynamics under Mediterranean semi-arid environment of Wadi El Maleh watershed, Algeria

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