Impacts of climate change on water erosion: A review

Li, Zhiying; Fang, Haiyan

doi:10.1016/j.earscirev.2016.10.004

Cited by 408 publications

(225 citation statements)

References 175 publications

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“…This implies mean soil erosion rate of this high-latitude headwater watershed projected in historical times has exceeded the most commonly quoted tolerate soil loss rate (1 t·ha −1 ·year −1 ) [46][47][48]. The erosion rate of this headwater watershed was likely to continue increasing under future climate scenarios if no adaption strategies and measurements were undertaken.…”

Section: Environmental Implicationsmentioning

confidence: 99%

Climate Change Impacts on Flow and Suspended Sediment Yield in Headwaters of High-Latitude Regions—A Case Study in China’s Far Northeast

Zhou

Xiao

et al. 2017

Water

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Climate change is expected to have stronger effects on water resources in higher latitude regions. Despite intensive research on possible hydrological responses in those regions to a warmer environment, our knowledge on erosion and sediment yield induced by the climate change in high-latitude headwaters is still limited. In this study, we estimated suspended sediment yields from 2021 to 2050 in a typical headwater area of far Northeast China to elucidate potential impacts of future climate change on surface runoff and erosion in higher latitude regions. We first parameterized the Soil and Water Assessment Tool (SWAT) using historical measurements to estimate runoff from the river basin. The model performed well in both the calibration (2006)(2007)(2008)(2009)(2010)(2011) and the validation (2012-2014) periods, with an R 2 of 0.85 and 0.88 and a Nash-Sutcliffe Efficiency (NSE) of 0.7 and 0.73, respectively. We also utilized historical measurements on sediment yields from the period 2006-2014 to develop a runoff-sediment yield rating curve, and the rating curve obtained an excellent goodness of fit (R 2 = 0.91, p < 0.001). We then applied the calibrated SWAT model to two climate change projections, also known as Representative Concentration Pathways (RCP4.5 and RCP8.5), for the period from 2021 to 2050 to obtain future runoff estimates. These runoff estimates were then used to predict future sediment yield by using the developed runoff-sediment yield rating curve. Our study found a significant increase of annual sediment yield (p < 0.05) for both climate change projections (RCP4.5 = 237%; RCP8.5 = 133%) in this, China's high-latitude region. The increases of sediment yield were prevalent in summer and autumn, varying from 102-299% between the two RCPs scenarios. Precipitation was the dominated factor that determined the variation of runoff and sediment yield. A warming climate could bring more snowmelt-induced spring runoff and longer rainy days in autumn, hence leading to higher erosion. These findings demonstrate that under the changing climate, soils in this high-latitude headwater area would be eroded twice to three times that of the baseline period , indicating a potential risk to the downstream water quality and reservoir management.

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Section: Environmental Implicationsmentioning

confidence: 99%

Climate Change Impacts on Flow and Suspended Sediment Yield in Headwaters of High-Latitude Regions—A Case Study in China’s Far Northeast

Zhou

Xiao

et al. 2017

Water

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“…Previous studies indicated that erosion can either decrease or increase under climate change due to the combined effect of decreasing precipitation, increasing intensity and changing vegetation cover (Li and Fang, 2016). However, most previous studies do not, or insufficiently, account for crucial processes like infiltration excess surface runoff, and intra-and inter-annual 15 vegetation development as affected by climate change.…”

Section: Discussionmentioning

confidence: 94%

“…To enhance accuracy and spatial resolution of climate projections some studies adopt Regional Climate Models (RCMs) to downscale GCM output (Jacob et al, 2014) and apply bias-correction methods to overcome the bias between historical observed and modelled data. While the change factor (or delta change) approach is the most popular bias-correction 10 method, other bias-correction methods that consider the change in future precipitation distribution are needed to assess the effects of changes in frequency and intensity of extreme events (Mullan et al, 2012;Li and Fang, 2016). The selection of climate models, downscaling and bias-correction methods strongly affects the climate projections (Maraun et al, 2017) and consequently also the simulated hydrological and erosional response.…”

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confidence: 99%

Why increased extreme precipitation under climate change negatively affects water security

Eekhout¹,

Hunink²,

Terink³

et al. 2018

Preprint

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Abstract. An increase of extreme precipitation is projected for many areas worldwide in the coming decades. To assess the impact of increased precipitation intensity on water security, we applied a regional scale hydrological and soil erosion model, forced with Regional Climate Model projections. We specifically considered the impact of climate change on the distribution of water between soil (green water) and surface water (blue water) compartments. We show that an increase in precipitation intensity leads to a redistribution of water within the catchment, where water storage in soil decreases and reservoir inflow 5 increases. This affects plant water stress and the potential of rainfed versus irrigated agriculture, and increases dependency on reservoir storage, that is increasingly threatened by an increase of soil erosion. This study demonstrates the crucial importance of accounting for the fact that increased precipitation intensity leads to water redistribution between green and blue water, increased soil erosion, and reduced water security.

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“…Dentre esses modelos, o SWAT vem sendo amplamente utilizado em diversas partes do mundo (DESTA; LEMMA, 2017;LI;FANG, 2016;VIGIAK et al, 2017). Sua popularização deve-se a possibilidade de integração do modelo com um Sistema de Informações Geográficas (SIG), o que permite uma maior facilidade na manipulação dos dados de entrada e de saída do modelo.…”

Section: Introductionunclassified

Estimativa Da Produção De Sedimentos Na Bacia Do Reservatório Epitácio Pessoa – Pb

Silva¹,

Silva²,

Henriques³

et al. 2017

OKARA

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ResumoEntender e representar o comportamento do ciclo hidrológico de uma bacia hidrográfica é de grande importância para uma gestão eficiente dos seus recursos e a utilização de modelos hidrológicos vem para contribuir nesse sentido. Diante disso, esse trabalho tem por objetivo realizar a estimativa da produção de sedimentos na bacia hidrográfica do Reservatório Epitácio Pessoa na Paraíba, uma bacia que vem sofrendo com longos períodos de escassez hídrica e a produção de sedimentos. O estudo foi realizado para o período de 2001 a 2014, utilizando o modelo SWAT. A vazão média simulada para o período foi de 12,87 m³/s e a produção média estimada de sedimentos para a bacia foi de 0,03 (ton.ha -1.ano -1 ) durante os 14 anos analisados. Com base nas estimativas, o total de sedimentos que foram depositados no reservatório foi de aproximadamente 434 mil toneladas em 14 anos. Com isso, faz-se necessária a utilização de políticas para diminuir a produção de sedimentos da bacia e consequentemente minimizar o processo de assoreamento do reservatório Epitácio Pessoa, que ao longo dos anos vem causando a diminuição da sua capacidade total de armazenamento, que originalmente era de 535.680.000 m³ (DNOCS, 1963), e hoje segundo a AESA é de 411.686.287 m³.Palavras-chave: modelo SWAT. Semiárido. erosão dos solos. ESTIMATED SEDIMENT YIELD IN THE EPITÁCIO PESSOA RESERVOIR BASIN AbstractUnderstanding and representing the behavior of the hydrological cycle of a river basin have a great importance for an efficient management of its resources and

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Impacts of climate change on water erosion: A review

Cited by 408 publications

References 175 publications

Climate Change Impacts on Flow and Suspended Sediment Yield in Headwaters of High-Latitude Regions—A Case Study in China’s Far Northeast

Climate Change Impacts on Flow and Suspended Sediment Yield in Headwaters of High-Latitude Regions—A Case Study in China’s Far Northeast

Why increased extreme precipitation under climate change negatively affects water security

Estimativa Da Produção De Sedimentos Na Bacia Do Reservatório Epitácio Pessoa – Pb

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