Modeling Soil Erosion and Sediment Load for Red River Basin (Vietnam): Impact of Land Use Change and Reservoirs Operation

Van, Thinh Le; Ranzi, Roberto; Rulli, Maria Cristina

doi:10.1109/eeeic.2018.8494392

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…It is worth noting that the majority of this cumulative trapping rate comes from the Hoa Binh dam-reservoir, as it has had an overwhelming impact on the sediment load in the river system, as analysed above. This estimate is similar to that of previous researchers who reported that approximately 60% of the suspended sediment load in the Da River has been trapped (sedimentation rate) in the Hoa Binh dam-reservoir (Dang et al, 2010;Le, Ranzi, & Rulli, 2018;Ve et al, 2021;Wei et al, 2021).…”

Section: Sediment Trapped Due To the Dam-reservoir Operationssupporting

confidence: 91%

“…For example, Le et al (2007) reported that the total sediment load decreased by about 70% (measured at the Son Tay station) since the impoundment of the Hoa Binh. Other studies (Le, Ranzi, & Rulli, 2018; Lu et al, 2015; Ve et al, 2021; Wei et al, 2021) have reported that sediment delivery dramatically decreased from about 50 × 10 6 (1990s) to 12 × 10 6 t/year (2010s), coinciding with the operation of the newest dam‐reservoirs, Tuyen Quang (2008) and Son La (2010). To date, there are nine large dam‐reservoirs (storage capacity >0.1 km 3 ) that have been operated upstream of the Red River system, seven in Vietnam's territory and two in China's territory, namely, Thac Ba (1971), Hoa Binh (1988), Nansha (2008), Tuyen Quang (2008), Madushan (2010), Son La (2010), Ban Chat (2013), Huoi Quang (2015) and Lai Chau (2016).…”

Section: Introductionmentioning

confidence: 95%

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Seasonal variations of sediment load related to all large damming in the Red River system: A 64‐year analysis

Quang

Banno

et al. 2023

Earth Surf Processes Landf

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Variations of water discharge and sediment load in the Red River basin have received considerable attention due to its drastic reduction during the past several decades. This paper presents a more specifically investigating of the seasonal variations in water discharge and sediment load from 1958 to 2021, both before and after the impoundment of all large dam‐reservoirs, using daily observations from the Son Tay hydrological gauging station, the outlet of the Red River system and entry to the delta. Sediment loads have decreased progressively since the early 1990s due to sediment yield reduction and dams in the upper basin, with a reduction of about 91% (from 116 × 106 to 11 × 106 t/year) over the 64‐year observation period. Prior to the impoundment of the Hoa Binh dam‐reservoir in 1988, the hydrological processes in the Red River system exhibited seasonal anomalies (clockwise mode on the hysteresis of rating curve), which implies that sediment load is highly proportional to water discharge and precipitation. The hysteresis loops between mean monthly water discharge and suspended sediment concentration after 1988 were altered by tributary dam‐reservoirs and a phenomenon known as ‘temporal monsoon moving’, which shifted the rating curve from clockwise to counterclockwise mode. Our long‐term analysis indicates that approximately 57.5% and 79% of sediments were trapped during the periods 1989–2008 (after Hoa Binh dam‐reservoir impoundment) and 2009–2021 (a series of new dam‐reservoirs went into operation), respectively, primarily during the high‐discharge months (June–October). Additionally, we concluded that the contribution of climate components (e.g., rainfall) to the dramatic decline in sediment load of the Red River system was less than the human impact.

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Section: Sediment Trapped Due To the Dam-reservoir Operationssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 95%

Seasonal variations of sediment load related to all large damming in the Red River system: A 64‐year analysis

Quang

Banno

et al. 2023

Earth Surf Processes Landf

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“…The land use change that was investigated in this area assumed the conversion of 20% of forest area into rice and agricultural crops and 15% of forest area into bushed, shrubs, and meadows. These cover soil variations showed a 28% increase of sediment load; then, it produced a significant effect on sediment production in the Lo basin [7,8]. Another example of land use impact on water erosion is given by [9], which predicted the variations of runoff and soil erosion in two catchments in Portugal during 2071-2100.…”

Section: Introductionmentioning

confidence: 99%

Water Soil Erosion Evaluation in a Small Alpine Catchment Located in Northern Italy: Potential Effects of Climate Change

Berteni

Grossi

2020

Geosciences

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Water erosion and evaluation of the average annual soil loss considering the potential effects of climate change are the focus of this study, based on the application of two empirical models, the RUSLE (Revised Universal Soil Loss Equation) and the EPM (Erosion Potential Method), to an Italian case study. A small mountain basin, the Guerna creek watershed, is located in the Central Southern Alps (Lombardy, Southern Alps, Bergamo), and it has been affected in the past by flooding and erosion events, which stressed the hydraulic weaknesses of the study area. Three different future climate scenarios were built for the middle of this century (from 2041 to 2060) on the basis of CORDEX data and Representative Concentration Pathways (RCP) set by the IPCC (Intergovernmental Panel on Climate Change) future scenarios: RCP 2.6, RCP 4.5, and RCP 8.5. As concerns climate, precipitation and air temperature are the variables used in the empirical models. On the other hand, potential effects on land use were also considered. Computed soil loss of 87 t/ha/year and 29.3 t/ha/year was achieved using the RUSLE equation and EPM method respectively, without considering the potential effects of climate change. The results achieved showed that climate change impacts on water erosion may not be negligible even by the middle of the current century (the annual average soil loss could change by 6–10% on a basin scale), and a major role is being played by seasonality in rainfall peak intensity.

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Long-term analysis of sediment load changes in the Red River system (Vietnam) due to dam-reservoirs

Quang,

Viet

2023

Journal of Hydro-environment Research

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Modeling Soil Erosion and Sediment Load for Red River Basin (Vietnam): Impact of Land Use Change and Reservoirs Operation

Abstract: Erosion and sediment transport have critical implications for aquatic ecology, agriculture, water supply and river navigation. In recent years, with the construction and operation of several reservoirs in Red river basin (China

Cited by 3 publications

References 35 publications

Seasonal variations of sediment load related to all large damming in the Red River system: A 64‐year analysis

Seasonal variations of sediment load related to all large damming in the Red River system: A 64‐year analysis

Water Soil Erosion Evaluation in a Small Alpine Catchment Located in Northern Italy: Potential Effects of Climate Change

Long-term analysis of sediment load changes in the Red River system (Vietnam) due to dam-reservoirs

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