"In a sustainable community, resource consumption is balanced by resources assimilated by the ecosystem. The sustainability of a community is largely determined by the web of resources providing its food, fiber, water, and energy needs and by the ability of natural systems to process its wastes. A community is unsustainable if it consumes resources faster than they can be renewed, produces more wastes than natural systems can process or relies upon distant sources for its basic needs."
Showing posts with label floods. Show all posts
Showing posts with label floods. Show all posts

Friday, September 20, 2013

Top 10 cities most at risk of natural disaster

Earthquakes, Floods, Storms, Tsunamis, Etc...

All the natural disasters in the news lately made us wonder what parts of the world were most threatened by things like floods & earthquakes. Massive reinsurer Swiss Re (a reinsurance company sells insurance to insurance companies, allowing them to offload some risks...) has a new report titled "Mind the risk: A global ranking of cities under threat from natural disasters" (pdf) that sheds some light on exactly that. Using their sophisticated modelling software and huge database of past events, they came up with a probabilistic ranking.

There are all kinds of ways to look at the data, but here are some of the most interesting variations.


Swiss Re/Screen capture
There are all kinds of ways to look at the data, but here are some of the most interesting variations.

 

Swiss Re/Screen capture

The list changes a bit if we look at it by "working days lost". More European and US cities appear on the top 10.

If we look at just earthquake risk, this is what the top 10 looks like for both people affected and working days lost: More

 

Tuesday, August 20, 2013

Save the Date: World Conference on Disaster Risk Reduction 2015

Subject to an anticipated decision of the UN General Assembly later in 2013, the Third United Nations World Conference on Disaster Risk Reduction (WCDRR) is to take place in Sendai City, Miyagi Prefecture, Japan, from 14 to 18 March 2015 (five days inclusive).


Hosted by the Government of Japan in cooperation with the United Nations Office for Disaster Risk Reduction (UNISDR), as secretariat of the International Strategy for Disaster Reduction, the WCDRR will review the implementation of the Hyogo Framework for Action and is expected to adopt a successor framework for disaster risk reduction.

The post-2015 framework for disaster risk reduction will build on the knowledge and practice developed through the implementation of the International Framework for the International Decade for Natural Disaster Reduction of 1989, the Yokohama Strategy and Plan of Action of 1994, the International Strategy for Disaster Reduction of 1999 and the Hyogo Framework for Action 2005-2015: Building the Resilience of Nations and Communities to Disasters. Pursuant to General Assembly resolution 66/199, UNISDR will continue to ensure extensive and inclusive multi-stakeholder consultations for a post-2015 framework for disaster risk reduction.

Kind regards,
UNISDR


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International Day for Disaster Reduction 2013
http://www.unisdr.org/2013/iddr

The United Nations Office for Disaster Risk Reduction (UNISDR)
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Monday, August 19, 2013

Weather-related losses take their toll

August 19th 2013 8:00 AM Extreme weather events are taking their toll on the insurance industry even though midway through August the North Atlantic has yet to see its first hurricane of the year.

So far there have been five tropical storms including the currently active system Tropical Storm Erin, which is expected to dissipate in the mid-Atlantic.

But while there have been no hurricanes to wreak economic losses, there have been plenty of weather-related events elsewhere to keep risk managers and (re)insurance executives on their toes.

Zurich Insurance Group reported on Thursday a sharp decline in its second-quarter profits, mainly due to weather-related losses in Europe. The company’s net income fell 27 percent to $789 million.

Other insurers and reinsurers are counting the cost of this year’s severe weather-related events.

The major economies of the US, China and Canada have all suffered billions of dollars of losses as a result of severe weather, flooding and — in the case of China — earthquakes.

Strong thunderstorms and rain across the greater Toronto metropolitan region last month caused significant flooding and power outages, which affected businesses, vehicles and infrastructure. Economic losses from that single event have been estimated by AON Benfield at $1.45 billion, with around half of that cost covered by insurance. There was further severe weather in Ontario and Quebec provinces during July, with winds gusting up to 100mph during intense thunderstorms, which caused millions of dollars in insured losses.

Even before July, Canada had already suffered severe weather and flooding. Floods that occurred between June 19 and 24 claimed four lives and caused economic losses of $5.3 billion.

The insurance arm of Canada’s TD Bank Group expected claims costs from the severe weather in Alberta and Toronto to have a pre-tax impact of approximately $170 million after reinsurance.

Group president Ed Clark, in a statement to investors last month, said: “While banks and insurance companies can incur losses from severe weather events, our greatest concern is with the communities and individuals who experienced the devastation in Alberta and the GTA (Greater Toronto Area). We also thank our employees for their efforts to support our customers through these events, when many employees themselves were dealing with the impact.”

In the US weather-related losses have also been significant since the start of the year, with the Plains, Midwest and Northeast suffering economic losses of $6.5 billion in two bouts of severe weather in May and June.

For China it has been worse. During July torrential rainfall across many parts of the country brought floods that claimed the lives of almost 200 people and caused economic losses of more than $7 billion. A magnitude 5.9 earthquake on July 22 in the Gansu Province killed at least 95, damaged 80,000 homes and caused economic losses of $3.25 billion. Since the start of the year China has suffered economic losses due to a number of smaller earthquakes and weather-related events, by far the most significant is the $6 billion loss attributed to drought conditions in parts of the country since January 1.

Europe, Asia, Africa and South America have all suffered weather-related economic losses. A drought in Brazil between January and June caused losses estimated at $8.5 billion, while flooding in central Europe in May and June caused economic losses of $22 billion.

In the aftermath of the devastating floods in Europe, Peter Höppe, head of Munich Re’s Geo Risks Research unit, said: “It is evident that days with weather conditions that lead to such flooding are becoming more frequent and that such weather systems tend to remain stationary for longer. With this higher persistence of weather patterns, the potential for heavy and long-lasting precipitation within a trough situation, for example, increases. The counterpart to this are stationary high-pressure systems which in summer increase the risk of heatwaves and periods of drought.

“Debate in climate research is currently focusing on what the causes of such changes in weather patterns could be and what role climate change might play in this. But it is naturally not possible to explain single events on this basis.”

Even places as remote as the Azores archipelago have not escaped the wrath of the weather. In March the North Atlantic island group took a $45 million economic hit, with more than 500 properties damaged and three lives lost after days of heavy rain lashed the island of Terceira causing severe flooding.

Significant economic losses during July:

US (Severe weather) $175m+

Canada (Severe weather) $1.45b+

China (Flooding) $7b+

Significant economic loss events (January to June 2013):

US (Severe weather May 18-22) $4.5b+

Canada (Flooding June 19-24) $5.3b+

Brazil (Drought Jan 1-May 31) $8.3b+

Europe (Flooding May 30-June 15) $22b+

China (Drought Jan 1-July 31) $6b+

* Economic loss figures from AON Benfield’s Global Catastrophe Recap.

 

Monday, June 10, 2013

Istanbul: Here I come

I am off to Istanbul tomorrow to join the Climate Reality Leadership Corps with former Vice-President Al Gore. I want to help change the world and raise awareness of climate change. After four years of trying I have finally been invited to undertake the training.

All around the world, members of the Climate Reality Leadership Corps trained by Chairman and former Vice President Al Gore are standing up and making a difference on the climate crisis. They’re leading by example, speaking to their communities about how climate change affects their daily lives—and what we can do to solve it. They’re appearing in the media, activating social networks, and—most of all—inspiring people everywhere to join us in confronting the defining issue of our time.


I have not been in Istanbul since 1976 so it will be good to be back and revisit some of the wonderful places to see. I am staying in the old city close to the Blue Mosque. One of the other places I want to see is the Basilica Cistern given my interest in water harvesting and storage.

This cathedral-size cistern is an underground chamber approximately 138 metres (453 ft) by 64.6 metres (212 ft)[5] - about 9,800 square metres (105,000 sq ft) in area - capable of holding 80,000 cubic metres (2,800,000 cu ft) of water. The ceiling is supported by a forest of 336 marble columns, each 9 metres (30 ft) high, arranged in 12 rows of 28 columns each spaced 4.9 metres (16 ft) apart. The capitals of the columns are mainly Ionic and Corinthianstyles, with the exception of a few Doric style with no engravings. One of the columns is engraved with raised pictures of a Hen's Eye, slanted braches, and tears. This column resembles the columns of the Triumphal Arch of Theodosius I from the 4th century (AD 379-395), erected in the 'Forum Tauri' Square. Ancient texts suggest that the tears on the column pay tribute to the hundreds of slaves who died during the construction of the Basilica Cistern. The majority of the columns in the cistern appear to have been recycled from the ruins of older buildings (a process called 'spoliation'), likely brought to Constantinople from various parts of the empire, together with those that were used in the construction of Hagia Sophia. They are carved and engraved out of various types of marble and granite.[6]

Fifty-two stone steps descend into the entrance of the cistern. The cistern is surrounded by afirebrick wall with a thickness of 4 metres (13 ft) and coated with a waterproofing mortar. The Basilica Cistern's water came from the Eğrikapı Water Distribution Center in the Belgrade Forest, which lie 19 kilometres (12 mi) north of the city. It traveled through the 971 metres (3,186 ft)-long Valens (Bozdoğan) Aqueduct, and the 115.45 metres (378.8 ft)-long Mağlova Aqueduct, which was built by the Emperor Justinian.[7]

The cistern has the capacity to store 100,000 tons of water, despite being virtually empty today with only a few feet of water lining the bottom.

The weight of the cistern lies on the columns by means of the cross-shaped vaults and round arches of its roof.


The Basilica Cistern has undergone several restorations since its foundation. The first of the repairs were carried out twice during the Ottoman State in the 18th century during the reign of Ahmed III in 1723 by the architect Muhammad Agha of Kayseri. The second major repair was completed during the 19th century during the reign of Sultan Abdulhamid II (1876–1909). Cracks to masonry and damaged columns were repaired in 1968, with additional restoration in 1985 by the Istanbul Metropolitan Museum. During the 1985 restoration, 50,000 tons of mud were removed from the cisterns, and a platforms built throughout to replace the boats once used to tour the cistern. The cistern was opened to the public in its current condition on 9 September 1987. In May 1994, the cistern underwent additional cleaning.

I believe that water security is going to be a large issue in the future and have been unfertaking a sturdy of of traditional methods of harvesting and storing water, methods with do not require huge amounts of energy.