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Masada Geography
Geography for the learners of Masada College, Sydney
Curated by Ryan Gill
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The world's megacities that are sinking 10 times faster than water levels are rising

The world's megacities that are sinking 10 times faster than water levels are rising | Masada Geography |
Scientists have issued a new warning to the world’s coastal megacities that the threat from subsiding land is a more immediate problem than rising sea levels caused by global warming.


A new paper from the Deltares Research Institute in the Netherlands published in April identified regions of the globe where the ground level is falling 10 times faster than water levels are rising - with human activity often to blame.

In Jakarta, Indonesia’s largest city, the population has grown from around half a million in the 1930s to just under 10 million today, with heavily populated areas dropping by as much as six and a half feet as groundwater is pumped up from the Earth to drink.

The same practice led to Tokyo’s ground level falling by two meters before new restrictions were introduced, and in Venice, this sort of extraction has only compounded the effects of natural subsidence caused by long-term geological processes.


Tags: coastal, climate change, urban, megacities, water, environment, urban ecology.

Via Seth Dixon
Adilson Camacho's curator insight, August 2, 2014 12:32 AM


Matt Evan Dobbie's curator insight, August 2, 2014 6:55 PM

Huge problem when combined with sea level rise

MsPerry's curator insight, August 12, 2014 6:53 PM


Rescooped by Ryan Gill from Geography Education!


Fulgurites | Masada Geography |

Fulgurites are the rocks that form when lightning strikes sand (there are other types as well) and it creates a hollow tube.  Think of it as petrified lightning--super cool! 

Via Seth Dixon
Kimberly Hordern's comment, April 28, 2013 8:46 PM
I have never heard of these before. I thought it was really interesting how they a made. It is confusing however how the article talks about lighting being able to create these almost every time it strikes then how come they are not more common?
Seth Dixon's comment, April 28, 2013 9:02 PM
If you want to see how to coax nature into producing these things while watching a rom-com, see "Sweet Home Alabama" w/Reese Witherspoon.
Thomas D's comment, April 29, 2013 4:53 PM
I find this article very interesting, I have never heard about or seen this in my life. I had no idea that these types of things could be formed from a lightning strike. The article is a little confusing however saying that these can happen all the time. Maybe it’s because I’ve never seen a lightning bolt directly hit the ground in front of me and see the reaction of the earth. I just find it hard to see as this being the first time I would come across something like this.
Rescooped by Ryan Gill from Geography Education!

Pink Lakes

Pink Lakes | Masada Geography |
Photo by Jean Paul Ferrero/Ardea/Caters News (via Exposing the Truth   Lake Hillier is a pink-coloured lake on Middle Island in Western Australia. Middle island is the largest of the islands a...

Via Seth Dixon
Hector Alonzo's curator insight, December 15, 2014 11:44 PM

The pink lake, Lake Hillier,  located in Western Australia is stunning. The aerial view of the lake makes the lake seem unreal that is was is fascinating. What gives the lake its pink color is a mystery, but it may be from bacteria, but it shows how some places in the world are affected differently than others and it produces remarkable results.

Nicole Kearsch's curator insight, December 17, 2014 1:48 AM

Now this is bizarre.  A pink lake and no one is really sure as to why it is pink.  It is not on the top of my list of places to go swimming, that is for sure.  Although scientists don't seem too concerned about the safety of the lake for people but are curious as to what is causing the lake to be pink.  Thoughts on algea and bacteria levels or the amount of salt are included in the potential reasoning for the pink color.  Even on google earth you can see that the lake is in fact pink.  Even when scientists come to a conclusion as to what is causing the pink colored lake, as far as it isn't causing any environmental issues, I think that the lake should be left pink as a type of wonder of the world attraction for people to see.

Lena Minassian's curator insight, May 7, 11:54 AM

This article caught my eye because I have never seen a pink lake before. This lake is on Middle Island in Western Australia. The lake is 600 meters wide but the reasoning behind the color of it is still yet to be determined. White salt rims the lake and the color may be caused from a low nutrient concentration and even just bacteria. The pictures of this lake are beautiful and there is not anything like it.