Complex relationships between water discharge and sediment concentration across the Loess Plateau, China

Zheng, Haiyan; Miao, Chiyuan; Jiao, Juying; Borthwick, Alistair G. L.

doi:10.1016/j.jhydrol.2021.126078

Cited by 12 publications

(8 citation statements)

References 23 publications

(18 reference statements)

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“…Warming of the climate system is unequivocal, a fact that has drawn overwhelming attention from the public, governments, and academic communities in recent decades (Gou et al 2021). The warming has exerted profound, worldwide impacts on human life (Cheng et al 2018;Sun et al 2019), agricultural production (Liu et al 2019(Liu et al , 2021Tigchelaar et al 2018), land use (Seneviratne et al 2018), and natural ecosystems (Gou et al 2020;Zheng et al 2021). Among the areas expected to be sensitive to this warming is the region known as the Third Pole, which includes the Tibetan Plateau and the mountains surrounding it.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of historical CMIP6 model simulations and future projections of temperature over the Pan-Third Pole region

Fan

Duan

Shen

et al. 2021

Environ Sci Pollut Res

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The Pan-Third Pole (PTP) region, which encompasses the Eurasian highlands and their surroundings, has experienced unprecedented, accelerated warming during the past decades. This study evaluates the performance of historical simulation runs of the Coupled Model Intercomparison Project (CMIP6) in capturing spatial patterns and temporal variations observed over the PTP region for mean and extreme temperatures. In addition, projected changes in temperatures under four Shared Socioeconomic Pathway (SSP) scenarios (SSP1‐2.6, SSP2‐4.5, SSP3-7.0, and SSP5‐8.5) are also reported. Four indices were used to characterize changes in temperature extremes: the annual maximum value of daily maximum temperature (TXx), the annual minimum value of daily minimum temperature (TNn), and indices for the percentage of warm days (TX90p) and warm nights (TN90p). Results indicate that most CMIP6 models generally capture the characteristics of the observed mean and extreme temperatures over the PTP region, but there still are slight cold biases in the Tibetan Plateau. Future changes of mean and extreme temperatures demonstrate that a strong increase will occur for the entire PTP region during the twenty-first century under all four SSP scenarios. Between 2015 and 2099, ensemble area-averaged annual mean temperatures are projected to increase by 1.24 °C/100 year, 3.28 °C/100 year, 5.57 °C/100 year, and 7.40 °C/100 year for the SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5 scenarios, respectively. For TXx and TNn, the most intense warming is projected in Central Asia. The greatest number of projected TX90p and TN90p will occur in the Southeast Asia and Tibetan Plateau, respectively.

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Section: Introductionmentioning

confidence: 99%

Evaluation of historical CMIP6 model simulations and future projections of temperature over the Pan-Third Pole region

Fan

Duan

Shen

et al. 2021

Environ Sci Pollut Res

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“…In other studies, the contribution rate of rainfall in the Yellow River Basin to the reduction in sediment load was 20% (Peng et al, 2010), and the contribution rate of climate in the upper reaches of the Yangtze River to the change in sediment load was 7%-36% (Huang and Wei, 2015), which was basically consistent with the results of this paper. In addition, large-scale soil and water conservation measures and the construction of water conservancy projects will affect changes in the sediment load (Zhao et al, 2020;Zheng et al, 2021).…”

Section: Figure 16mentioning

confidence: 99%

Variation characteristics of rainfall erosivity in tropical China and its impact on river sediment load

Chen

Guo

et al. 2023

Front. Environ. Sci.

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Rainfall erosivity is one of the important factors leading to soil and water erosion, affecting the intensity of soil erosion and the variation of river sediment load. This work aimed to explore the distribution and variation characteristics of rainfall erosivity in the Nandu River Basin in tropical China and to clarify the effect of rainfall erosivity on sediment load variation. The daily rainfall data of 13 meteorological stations in the Nandu River Basin during 1971–2020 were used to calculate the rainfall erosivity of the river basin by using the rainfall erosivity model based on the daily rainfall. The analyses were conducted using the Mann-Kendall non-parametric trend/abrupt test, wavelet analysis, inverse distance weighted interpolation and other research methods to determine the temporal and spatial fluctuation patterns of rainfall erosivity and sediment load. The annual mean rainfall erosivity in the Nandu River Basin during 1971–2020 was 16,497.67 MJ mm·ha−1·h−1, which showed an upward trend. The distribution of rainfall erosivity was concentrated from July to September. Except spring, the variation of rainfall erosivity in summer, autumn and winter showed an upward trend. Spatially, rainfall erosivity showed a decreasing trend from south to north. The variation coefficient of each meteorological station ranged from 0.24 to 0.43, showing high regional variability. The correlation between rainfall erosivity and erosive rainfall in the basin was the highest, followed by altitude and latitude. From 1980 to 2020, the sediment load in the Nandu River Basin showed an overall upward trend, with obvious periodic changes. The main change period was 25 years, and the sediment load had a large inter-annual variation. Taking the period before the inflection point of the double accumulation curve of sediment load and rainfall erosivity as the base period, since 2009, the river sediment load increased by 46.36% compared with the base period. The influence of the variation of rainfall erosivity on sediment load is −22.23%, and that of human activities on sediment load is 122.23%. These findings can provide a scientific reference for soil erosion model prediction, soil and water conservation and environmental management in tropical basins of China.

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“…Sediment-discharge relationships vary across space and time and are vulnerable to human activities (e.g., land use changes and soil and water conservation techniques) and weather events [10]. Studies by Zhang et al [9] concluded that the dynamics of rainfall-sediment load have changed in the context of ecological restoration.…”

Section: Introductionmentioning

confidence: 99%

Establishment of Monterrey Pine (Pinus radiata) Plantations and Their Effects on Seasonal Sediment Yield in Central Chile

et al. 2023

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Sediment production and transport in a basin are generally a function of the degree of soil protection, normally represented by plant cover. In this study, two basins located at similar latitudes but with different hydrological regimens and plant covers were studied, one with a pluvial regimen and forest plantations (Ñuble) and another one with the pluvio-nival regimen and native forest (Purapel). For this purpose, sediment yield was analyzed in both drainage areas using the Mann-Kendall statistical test. Both basins showed larger amounts of sediment production during winter months. In addition, sediment yield trends did not show significant variation in the case of the Ñuble, most likely due to non-relevant changes in plant cover over time. However, there is a sustained decrease in annual sediment release at Purapel, coinciding with the afforestation in the basin, so it is logical to attribute the referred reduction to this process. For the first time, the behavior of two watersheds is contrasted, one covered with native forest and the other one with forest plantations, appreciating that the basin covered with plantations presents a reduction in sediment production over time, which means that forest plantations are efficient in sediment retention, even in contrast to native forest. However, both basins have different types of soil, topography, etc., meaning that more studies are needed to support this theory.

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Complex relationships between water discharge and sediment concentration across the Loess Plateau, China

Cited by 12 publications

References 23 publications

Evaluation of historical CMIP6 model simulations and future projections of temperature over the Pan-Third Pole region

Evaluation of historical CMIP6 model simulations and future projections of temperature over the Pan-Third Pole region

Variation characteristics of rainfall erosivity in tropical China and its impact on river sediment load

Establishment of Monterrey Pine (Pinus radiata) Plantations and Their Effects on Seasonal Sediment Yield in Central Chile

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