Mapping the world’s free-flowing rivers

Nature, Journal Year: 2019, Volume and Issue: 569(7755), P. 215 - 221

Published: May 8, 2019

Language: Английский

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Anthropogenic stresses on the world’s big rivers

Nature Geoscience, Journal Year: 2018, Volume and Issue: 12(1), P. 7 - 21

Published: Dec. 7, 2018

Language: Английский

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Hydropower dams of the Mekong River basin: A review of their hydrological impacts

Journal of Hydrology, Journal Year: 2018, Volume and Issue: 568, P. 285 - 300

Published: Oct. 22, 2018

Language: Английский

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Earth’s sediment cycle during the Anthropocene

Nature Reviews Earth & Environment, Journal Year: 2022, Volume and Issue: 3(3), P. 179 - 196

Published: Feb. 1, 2022

Language: Английский

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River bank instability from unsustainable sand mining in the lower Mekong River

Nature Sustainability, Journal Year: 2020, Volume and Issue: 3(3), P. 217 - 225

Published: Jan. 13, 2020

Language: Английский

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Mekong delta much lower than previously assumed in sea-level rise impact assessments

Nature Communications, Journal Year: 2019, Volume and Issue: 10(1)

Published: Aug. 28, 2019

Abstract Deltas are low-relief landforms that extremely vulnerable to sea-level rise. Impact assessments of relative rise in deltas primarily depend on elevation data accuracy and how well the vertical datum matches local sea level. Unfortunately, many major located data-sparse regions, forcing researchers policy makers use low-resolution, global obtained from satellite platforms. Using a new, high-accuracy model Vietnamese Mekong delta, we show quality is insufficient underscore cruciality convert tidal datum, which often neglected. The novel shows delta has an low mean ~0.8 m above level, dramatically lower than earlier assumed ~2.6 m. Our results imply uncertainties impact for worldwide, with errors potentially larger century

Language: Английский

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Projections of declining fluvial sediment delivery to major deltas worldwide in response to climate change and anthropogenic stress

Environmental Research Letters, Journal Year: 2019, Volume and Issue: 14(8), P. 084034 - 084034

Published: July 9, 2019

Abstract Deltas are resource rich, low-lying areas where vulnerability to flooding is exacerbated by natural and anthropogenically induced subsidence geocentric sea-level rise, threatening the large populations often found in these settings. Delta ‘drowning’ potentially offset deposition of sediment on delta surface, making delivery fluvial a key balancing control offsetting relative provided that can be dispersed across subaerial delta. Here we analyse projected changes flux over 21st century 47 world’s major deltas under 12 environmental change scenarios. The scenarios were constructed using four climate pathways (Representative Concentration Pathways 2.6, 4.5, 6.0 8.5), three socioeconomic (Shared Socioeconomic 1, 2 3), one reservoir construction timeline. A majority (33/47) investigated experience reductions end century, when considering average scenarios, with mean maximum declines 38% 83%, respectively, between 1990–2019 2070–2099. These driven effects anthropogenic activities (changing land management practices dam construction) overwhelming future change. results frame extent magnitude sustainability global deltas. They highlight consequences direct (e.g. damming) indirect change) alteration dynamics stress need for further in-depth analysis individual aid developing appropriate measures.

Language: Английский

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Changes to long-term discharge and sediment loads in the Vietnamese Mekong Delta caused by upstream dams

Geomorphology, Journal Year: 2019, Volume and Issue: 353, P. 107011 - 107011

Published: Dec. 18, 2019

Language: Английский

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Soil erosion and sediment dynamics in the Anthropocene: a review of human impacts during a period of rapid global environmental change

Journal of Soils and Sediments, Journal Year: 2020, Volume and Issue: 20(12), P. 4115 - 4143

Published: Nov. 4, 2020

Abstract Purpose Humanity has been modifying the planet in a measurable way for thousands of years. Recently, this influence such that some feel we are new geological epoch, Anthropocene. This review will describe how soil erosion and sediment dynamics have (i) used to assess impact humans on (ii) affected global climate influenced water security. Emphasis is placed changes since middle twentieth century, as coincides with what many suggest start Anthropocene Epoch. Results discussion The use archives instrumental our understanding environmental systems developed over time, both naturally response anthropogenic activities. Additional information come from measurement monitoring programs, tracing fingerprinting studies. In turn, models enable forecasting. Some main impacts enhanced composition include: radiative energy balances cryosphere; carbon cycle; greenhouse gas emissions. Impacts security effects freshwater biota, including wild salmon populations; fluxes contaminants, microplastics; reservoir river channel sedimentation, flooding. Sediment programs also document effect mitigation measures policies. Conclusion us assemble variety timescales (i.e., 10 0 5 years longer) range spatial scales (from sub-watershed continental), addition environments ranging arid tropical polar. Often temporal resolution better than other paleoenvironmental reconstruction approaches. As such, sedimentary records, when combined approaches sources information, enabled determine atmospheric, terrestrial, aquatic systems, especially last 100 While provided wealth greatly role humanity planet, suggestions given further research.

Language: Английский

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Tidal amplification and salt intrusion in the Mekong Delta driven by anthropogenic sediment starvation

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: Dec. 10, 2019

Natural resources of the Mekong River are essential to livelihood tens millions people. Previous studies highlighted that upstream hydro-infrastructure developments impact flow regime, sediment and nutrient transport, bed bank stability, fish productivity, biodiversity biology basin. Here, we show tidal amplification saline water intrusion in Delta develop with alarming paces. While offshore M2 amplitude increases by 1.2-2 mm yr-1 due sea level rise, within delta is increasing 2 cm salinity channels 0.2-0.5 PSU yr-1. We relate these changes 2-3 m incisions response starvation, caused reduced supply downstream sand mining, which seems be four times more than previous estimates. The observed trends cannot explained deeper relative rise; while climate change poses grave natural hazards coming decades, anthropogenic forces drive short-term already outstrip effects. Considering detrimental identified, it imperative basin governments converge effective transboundary management resources, before irreversible damage made its population.

Language: Английский

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