Impact of Humans on the Flux of Terrestrial Sediment to the Global Coastal Ocean

Here we provide global estimates of the seasonal flux of sediment, on a river-by-river basis, under modern and prehuman conditions. Humans have simultaneously increased the sediment transport by global rivers through soil erosion (by 2.3 ± 0.6 billion metric tons per year), yet reduced the flux of s...

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Published in:Science (American Association for the Advancement of Science) 2005-04, Vol.308 (5720), p.376-380
Main Authors: Syvitski, James P. M, Vörösmarty, Charles J, Kettner, Albert J, Green, Pamela
Format: Article
Language:English
Subjects:
Agriculture
Analysis
Beach erosion
Brackish
Climatic zones
Coastal erosion
coastal water
Coasts
Conservation of Natural Resources
Dams
Databases, Factual
deforestation
Earth sciences
Earth, ocean, space
Ecosystem
Engineering and environment geology. Geothermics
Environmental aspects
environmental impact
Exact sciences and technology
Fluvial transport
Freshwater
Geologic Sediments
Human Activities
Human beings
Human influences
Humans
Man
Marine
Marine geology
Modeling
Models, Theoretical
Natural reservoirs
Networks
Observations
Oceans
Oceans and Seas
Pollution, environment geology
River basins
Rivers
Seasons
Seawater
Sediment transport
Sediment yield
Sediments
Soil
Water
water erosion
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description Here we provide global estimates of the seasonal flux of sediment, on a river-by-river basis, under modern and prehuman conditions. Humans have simultaneously increased the sediment transport by global rivers through soil erosion (by 2.3 ± 0.6 billion metric tons per year), yet reduced the flux of sediment reaching the world's coasts (by 1.4 ± 0.3 billion metric tons per year) because of retention within reservoirs. Over 100 billion metric tons of sediment and 1 to 3 billion metric tons of carbon are now sequestered in reservoirs constructed largely within the past 50 years. African and Asian rivers carry a greatly reduced sediment load; Indonesian rivers deliver much more sediment to coastal areas.
doi_str_mv 10.1126/science.1109454
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fulltext fulltext
identifier ISSN: 0036-8075
ispartof Science (American Association for the Advancement of Science), 2005-04, Vol.308 (5720), p.376-380
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source American Association for the Advancement of Science; Education Collection (Proquest) (PQ_SDU_P3); Social Science Premium Collection (Proquest) (PQ_SDU_P3); Alma/SFX Local Collection
subjects Agriculture
Analysis
Beach erosion
Brackish
Climatic zones
Coastal erosion
coastal water
Coasts
Conservation of Natural Resources
Dams
Databases, Factual
deforestation
Earth sciences
Earth, ocean, space
Ecosystem
Engineering and environment geology. Geothermics
Environmental aspects
environmental impact
Exact sciences and technology
Fluvial transport
Freshwater
Geologic Sediments
Human Activities
Human beings
Human influences
Humans
Man
Marine
Marine geology
Modeling
Models, Theoretical
Natural reservoirs
Networks
Observations
Oceans
Oceans and Seas
Pollution, environment geology
River basins
Rivers
Seasons
Seawater
Sediment transport
Sediment yield
Sediments
Soil
Water
water erosion
title Impact of Humans on the Flux of Terrestrial Sediment to the Global Coastal Ocean
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