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Ground subsidence is happening around the world. Some places are actually rising, naturally. Unfortunately for the east coast of the US, a recent study by Virginia Tech found that the coastal areas…
"The two effects, ground subsidence and sea level rise, are additive and hence hasten the effect and the need to migrate, reinforce, and mitigate as necessary."
It is already happening. Climate change and unsustainable practices are forcing more than people to move. Indonesia is considering moving its capital because the land there is sinking up to nine in…
"Arguments about causes are moot when effects can’t be ignored."
A rise in global temperatures could be devastating to coastal cities around the world that are already vulnerable to storms and flooding.
The cities listed are Jakarta, Bangkok, Lagos, Manila, Dhaka, Shanghai, London and Houston. The problem isn’t just rising ocean levels. For some of these cities, subsidence (sinking of the ground level) is a contributing factor. The subsidence is typically the result of withdrawal of ground water for household, commercial and industrial uses.
Excerpt:
If global temperatures rise above 1.5° Celsius above pre-industrial levels—the ideal temperature limit set by the Paris agreement—global sea levels will rise by more than 40 centimeters (approximately 15.7 inches) by 2100. If temperatures top 2° Celsius, sea level rise will be more than 50 centimeters (approximately 20 inches) by century's end. This could be devastating to coastal cities around the world that are already vulnerable to storms and flooding because of geological or urban planning factors.
That is the finding of a report from Christian Aid looking at eight coastal cities especially vulnerable to the effects of climate change. The Christian Aid report is one of several from organizations around the world being published in anticipation of the Intergovernmental Panel on Climate Change (IPCC) report on how and if the world can achieve the 1.5° Celsius goal, The Guardian reported. The IPCC report, scheduled to be released on Monday, is expected to say that the 1.5° goal is possible with urgent action to reduce greenhouse gas emissions. The Christian Aid report helps illuminate what is at stake.
Some 120,000 people live on the shrinking lowlands south of New Orleans - but getting their attention to looming environmental threats is no easy task
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Parts of California continue to sink (from Grist)
Here’s the story:
A NASA report released Wednesday found that land in one of California’s most productive agricultural regions continues to subside rapidly because of heavy groundwater pumping.
For decades, and especially during the last five years of drought, growers have relied on pumping water from the ground when surface water wasn’t available. A 2015 report found that the San Joaquin Valley experienced record rates of ground sinkage due to pumping. Now, according to NASA’s new report, it’s gotten worse in some areas.
While the state’s surface water drought is fading, with precipitation over 200 percent of normal for this time of year in some places, the recent years of low rain will have lasting effects. Ground sink can trigger a vicious cycle of other problems by changing stream flows and causing water infrastructure damage.
Until recently, groundwater pumping was largely unregulated in California. In 2014, Gov. Jerry Brown signed the Sustainable Groundwater Management Act, requiring local agencies to devise management plans to monitor pumping.
No surprise that floods are getting worse.
Excerpt:
Geological changes along the East Coast are causing land to sink along the seaboard. That’s exacerbating the flood-inducing effects of sea-level rise, which has been occurring faster in the western Atlantic Ocean than elsewhere in recent years.
New research using GPS and prehistoric data has shown that nearly the entire coast is affected, from Massachusetts to Florida and parts of Maine.
The study, published this month in Geophysical Research Letters, outlines a hot spot from Delaware and Maryland into northern North Carolina where the effects of groundwater pumping are compounding the sinking effects of natural processes. Problems associated with sea-level rise in that hot spot have been — in some places — three times as severe as elsewhere.
