Delta Subsidence: An Imminent Threat to Coastal Populations
نویسنده
چکیده
The Ganges–Brahmaputra Delta is one of several delta regions around the world that is sinking as the weight of its cities and industries combines with overextraction of natural resources from soft sedimentary deposits.
منابع مشابه
Linking rapid erosion of the Mekong River delta to human activities
As international concern for the survival of deltas grows, the Mekong River delta, the world's third largest delta, densely populated, considered as Southeast Asia's most important food basket, and rich in biodiversity at the world scale, is also increasingly affected by human activities and exposed to subsidence and coastal erosion. Several dams have been constructed upstream of the delta and ...
متن کاملGroundwater extraction, land subsidence, and sea-level rise in the Mekong Delta, Vietnam
Groundwater exploitation is a major cause of land subsidence, which in coastal areas poses a flood inundation hazard that is compounded by the threat of sea-level rise (SLR). In the lower Mekong Delta, most of which lies <2 m above sea level, over-exploitation is inducing widespread hydraulic head (i.e., groundwater level) declines. The average rate of head decline is ∼0.3 m yr, based on time-s...
متن کاملLand subsidence due to groundwater withdrawal: potential damage of subsidence and sea level rise in southern New Jersey, USA
Land subsidence due to groundwater withdrawal combined with a global sea level rise creates a serious environmental problem in the coastal region. Groundwater withdrawal results in fluid pressure change in the layers. The pressure change in the layers induces both elastic and inelastic land compaction. The elastic compaction can be recovered if the water level rises again and inelastic compacti...
متن کاملSinking cities in Indonesia: ALOS PALSAR detects rapid subsidence due to groundwater and gas extraction
a r t i c l e i n f o Keywords: Subsidence Interferometric synthetic aperture radar SBAS time-series Indonesia We use interferometric synthetic aperture radar (InSAR) time-series analysis of ALOS L-band SAR data to resolve land subsidence in western Indonesia with high spatial and temporal resolution. The data reveal significant subsidence in nine areas, including six major cities, at rates up ...
متن کاملExperimental river delta size set by multiple floods and backwater hydrodynamics
River deltas worldwide are currently under threat of drowning and destruction by sea-level rise, subsidence, and oceanic storms, highlighting the need to quantify their growth processes. Deltas are built through construction of sediment lobes, and emerging theories suggest that the size of delta lobes scales with backwater hydrodynamics, but these ideas are difficult to test on natural deltas t...
متن کامل