Deltas at risk

  title={Deltas at risk},
  author={James P. M. Syvitski},
  journal={Sustainability Science},
  • J. Syvitski
  • Published 27 February 2008
  • Environmental Science
  • Sustainability Science
The long-term sustainability of populated deltas is often more affected by large-scale engineering projects than sea-level rise associated with global warming and the global ocean volume increase. On deltas, the rate of relative eustatic sea-level rise is often smaller than the rate for isostatic-controlled subsidence and of the same order of magnitude as natural sediment compaction. Accelerated compaction associated with petroleum and groundwater mining can exceed natural subsidence rates by… 
Projections of declining fluvial sediment delivery to major deltas worldwide in response to climate change and anthropogenic stress
Deltas are resource rich, low-lying areas where vulnerability to flooding is exacerbated by natural and anthropogenically induced subsidence and geocentric sea-level rise, threatening the large
Establishing sustainable sediment budgets is critical for climate-resilient mega-deltas
Many of the world’s major river deltas face a sustainability crisis, as they come under threat of increases in salinity and the extent of tidal zones forced by combinations of sea-level rise, changes
Sinking deltas due to human activities
Many of the world's deltas are densely populated and intensively farmed. An assessment of recent publications indicates that the majority of these deltas have been subject to intense flooding over
Anticipated geomorphic impacts from Mekong basin dam construction
ABSTRACT The Mekong River is undergoing rapid dam construction. Seven mainstem dams are completed or under construction in China and 133 completed or proposed for the Lower Mekong River basin. We
Review: Advances in delta-subsidence research using satellite methods
Most of the world’s major river deltas are sinking relative to local sea level. The effects of subsidence can include aquifer salinization, infrastructure damage, increased vulnerability to flooding
Natural processes in delta restoration: application to the Mississippi Delta.
Understanding the mechanisms by which deltaic channel networks self-organize, grow, and distribute sediment and nutrients over the delta surface and coupling these to ecosystem processes, especially the interplay of topography, network geometry, and ecosystem dynamics, is understood.
Hazards of the Densu River delta in Accra—Ghana
Deltas are in a constant state of flux owing to hazards such as flooding, sea erosion and human activities. Climate change will probably increase the incidence of coastal recession and flooding of
Accelerated river avulsion frequency on lowland deltas due to sea-level rise
It is found that most large deltas are experiencing sufficiently low progradation rates such that relative sea-level rise enhances aggradation rates—accelerating avulsion frequency and associated hazards compared to preindustrial conditions.
Observations and scaling of tidal mass transport across the lower Ganges–Brahmaputra delta plain: implications for delta management and sustainability
Abstract. The landscape of southwest Bangladesh, a region constructed primarily by fluvial processes associated with the Ganges River and Brahmaputra River, is now maintained almost exclusively by
Impact of dams and climate change on suspended sediment flux to the Mekong delta.


Deltaic responses to changes in river regimes
Landscape Variability and the Response of Asian Megadeltas to Environmental Change
Deltas, occurring at the mouths of river systems that deposit sediments as they enter the sea, are some of the most dynamic sedimentary environments. They contain a long, and often economically
River-Sediment Inputs to Major Deltas
River sediments are distributed unevenly in space and time, and they are markedly susceptible to human influences. Half the world’s river sediment is derived from the Himalayan region and its
Nile Delta in its Destruction Phase
All deltas undergo alternating construction to destruction phases due to fundamental changes in the relative influence of sediment input from rivers and redistribution by marine coast al processes.
Regional hydrological research perspectives in the Niger Delta
Abstract The Niger Delta at the southernmost part of Nigeria, is a large and ecologically sensitive region. Natural and anthropogenic activities, such as subsidence, sea-level rise, upstream dams and
Dynamics of the Coastal Zone
Earth’s coastline has evolved for many thousands ofyears, experiencing changes to habitat, coastal dynam-ics and the supply of sediment from the continentalinterior. Relative sea level has risen in
Geomorphic/Tectonic Control of Sediment Discharge to the Ocean: The Importance of Small Mountainous Rivers
Analysis of data from 280 rivers discharging to the ocean indicates that sediment loads/yields are a log-linear function of basin area and maximum elevation of the river basin. Other factors
Impact of Humans on the Flux of Terrestrial Sediment to the Global Coastal Ocean
Global estimates of the seasonal flux of sediment, on a river-by-river basis, under modern and prehuman conditions are provided, showing African and Asian rivers carry a greatly reduced sediment load; Indonesian rivers deliver much more sediment to coastal areas.
Impact of Sea Level Rise on Flood Control in Bangkok and Vicinity
Long years of flood damage in Bangkok, Thailand have shown that flooding is not only a natural occurrence but also has resulted from urbanization and the utilization of natural resources. The steady