Seawater rising? Or the riverbeds sinking!

22 09 2009

Climate change has become a big issue in recent decades, and one of the major indicators that many people point to as a worrying potential problem is the rise in sea levels globally. There are island nations buying up land in foreign countries, people moving further inland, worse floods every year from tropical storms and hurricanes – yet perhaps an even more worrying problem is that the land itself is SINKING!

Scientists in the well-known and respected journal “Nature Geoscience” have recently published an article on the impact of human activities on the land drop towards sea level in many deltas worldwide. This closure towards the water, they claim, is far greater than the rise in sea level faced by the same inhabitants. Their abstract, below, will give a quick glimpse into the problem:

Many of the world’s largest deltas are densely populated and heavily farmed. Yet many of their inhabitants are becoming increasingly vulnerable to flooding and conversions of their land to open ocean. The vulnerability is a result of sediment compaction from the removal of oil, gas and water from the delta’s underlying sediments, the trapping of sediment in reservoirs upstream and floodplain engineering in combination with rising global sea level. Here we present an assessment of 33 deltas chosen to represent the world’s deltas. We find that in the past decade, 85% of the deltas experienced severe flooding, resulting in the temporary submergence of 260,000 km2. We conservatively estimate that the delta surface area vulnerable to flooding could increase by 50% under the current projected values for sea-level rise in the twenty-first century. This figure could increase if the capture of sediment upstream persists and continues to prevent the growth and buffering of the deltas.”

Taken from: http://www.nature.com/ngeo/journal/vaop/ncurrent/abs/ngeo629.html

detailed_chao-phraya

Chao Phraya River Basin

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Chao Phraya, (see image above) the river which flows through Bangkok is one of the worst affected – parts of the delta have sunk 15cm (six inches)! Compare this to the global rate of sea level rise due to climate change at only 1.8-3.0mm per year – nearly a tenfold difference!

Scientists estimate that the area of land vulnerable to flooding will increase by about 50% in the next 40 years due to a combination of climate change causing sea levels to rise and land sinking due to human causes.

“This study shows there are a host of human-induced factors that already cause deltas to sink much more rapidly than could be explained by sea level alone.” Journal Geoscience Article

The researchers report that the flow of sediment down to the Chao Phraya delta has been almost entirely blocked, due to  irrigation, damming the river, and directing the main flow through just a few channels. In rivers with no dams or man-made controls, the sediment would pass down the river and add to the height of the land, a process known as aggradation. (see image below) Now, the sediment can’t reach many delta areas. The further extraction of water and gas for irrigation, drinking, and industry further compacts the land.

Aggradation

As reported in the BBC yesterday, “Rivers affected include the Colorado, Nile, Pearl, Rhone and Yangtze. Of the 33 major deltas studied, 24 were found to be sinking. About half a billion people live in these regions…

THE HIGH-RISK LIST
Deltas with “virtually no aggradation (supply of sediment) and/or very high accelerated compaction”
Chao Phraya, Thailand
Colorado, Mexico
Krishna, India
Nile, Egypt
Pearl, China
Po, Italy
Rhone, France
Sao Francisco, Brazil
Tone, Japan
Yangtze, China
Yellow, China

As the ground falls and sea level rises, people become more vulnerable to inundation during storms.
Every year, about 10 million people are being affected by storm surges,” said Irina Overeem, another of the study team from the University of Colorado.

So should we be worrying about the inevitable rise in sea levels? Or more focused on the major impacts we are still having on these sinking river deltas, which around the world are home to almost half a billion human beings?

– Sarah Topps





A Road Map to World Harmony

4 08 2009

I always have trouble when people ask me to explain succintly what I am learning from my degree (International Development Studies) and why I am taking classes in so many different areas. Last year I had made a rough diagram which attempted to demonstrate how all the areas were interconnected – i.e. agriculture is affected by environment, women’s rights are affected by religion, modern-day governments are affected by political geography, which in turn is affected by history etc.

Areas of Study - Interconnections

LANG = language, EDUC = education, NUTR = Nutrition, RELG = Religion, AGRI = agriculture, GEOG = geography, ECON = economics/economy, ENVIR = environment

*since making this diagram, I have added a few more areas to my degree, and there are certainly more which could be connected, these are just my chosen areas of focus.

More recently, Toyota has released an interesting interactive website showing the same idea as shown above, but with suggestions on how we can improve on the problems which face the world, including energy, education, health and coexistence – just to mention a few.

I thought about trying to duplicate it on here somehow, but it’s probably best to just explore it yourself.

– Sarah Topps





One Billion Hungry People

19 07 2009

In my last post, I ranted about the sour economy and how terrible it was for students in North America to try and find a job in these troubled times. Perhaps I’ve been in my own country for too long again, and searching back through media stories today, this one hit me hard:

World hunger ‘hits one billion’

The UN said almost all of the world’s undernourished live in developing countries, with the most, some 642 million people, living in the Asia-Pacific region. In sub-Saharan Africa, the next worst-hit region, the figure stands at
265 million.

Here I am, feeling a bit undervalued and thinking that students in the North American recession have got it so tough, and BAM! this headline makes you sit up again and wish you could just crawl back into your safe academic hole. True as it is painful, while most students are being beleaguered to ‘just get a job’ and ‘stop messing around’ with our lives, there remains a full sixth of humanity which is slowly starving out their years on Earth.

Chronic malnutrition affects people long after they have begun eating normally again, killing many young children and causing stunting, lower life expectancies, eye and brain damage, and causing their own children to be smaller years later, thus repeating the trend. Most people who die from malnutrition actually die from micronutrient deficiencies such as Vitamin A, Iron and Zinc. For example according to prestigious medical journal The Lancet; Iodine deficiency is the number one preventable cause of mental damage worldwide.

According to Jean Ziegler* , mortality due to malnutrition accounted for 58% of the total mortality in 2006: “In the world, approximately 62 millions people, all causes of death combined, die each year. One in twelve people worldwide are malnourished. In 2006, more than 36 millions died of hunger or diseases due to deficiencies in micronutrients”

Fascinatingly enough, when I was working in Morocco last summer, I asked my fairly educated (high school or higher) students  if people had ever died of hunger in Morocco. The answer they unanimously gave was:
no, never, not since before Mohammed (blessed be he) was alive, not since before Christ, has anyone died of hunger.

Interesting. And I bet you would find many people in countries around the world who would echo their sentiments.
– Sarah Topps

*(the United Nations Special Rapporteur on the Right to Food for 2000 to March 2008)





Land Grabbing

6 06 2009

Yesterday I received an email from the Canadian Association for the Study of International Development (CASID) about a new website being launched by GRAIN a small international non-profit organisation that works to support small farmers and social movements in their struggles for community-controlled and biodiversity-based food systems.

The new website, http://farmlandgrab.org,  was launched last week to serve as an open forum to discuss the growing problem of out-sourced food production.

African Charter Article# 21: All peoples shall freely dispose of their wealth and natural resources for their exclusive interest, eliminating all forms of foreign economic exploitation.

The new website has news, reports, videos, and audio interviews to help people track and understand what is going on. Anyone can register and upload material. The site serves as an active forum for debate and proposals on how to turn things around, with free and open space to write your own piece, comment on someone else’s, or create new sections.

20 million hectares of good cropland worldwide has already been signed off to foreign investors.


One article that I read on the site mentions an article written by the Economist in their previous edition (May 30th 2009 ed.) but unfortunately I couldn’t find the story they referenced. Here is the article – on Food Security or Economic Slavery? – written on June 1st.

More on this topic to come soon, as I find it quite interesting, but would like to spend more timing forming my opinion.

******************************************************************************************************

(The following is an excerpt from the email I received on the CASID listserve)

“This new site is an improved version of the site initiated by GRAIN last year which provides an open, up-to-date, and easy to search library of over 800 articles, interviews, and reports on farm land grabs around the world – published since the outbreak of the food crisis in 2008.

The global trend to buy up or lease farmlands abroad as a strategy to secure basic food supplies, or simply to get rich, is not slowing down – it is getting worse. The scale is becoming more apparent now, with researchers counting some 20 million hectares of good cropland already signed off to foreign investors, or soon to be, worldwide. More countries and corporations are getting involved, from Sri Lanka to Congo or Hyundai to Varun. Farmers’ organisations, human rights groups and other social movements are agitating against this obscene approach to feeding their countries, while at least one government, the Ravalomanana regime in Madagascar, has been brought down because of its involvement in such a deal.

Next month, through a move by the Japanese government, which has a direct stake in locking down its own outsourced food supply, the Group of Eight most powerful countries are going to release a set of criteria to make these deals look “win-win”. The words will be smooth, but people won’t be fooled.

Like its predecessor, this new website contains mainly news reports, videos and audio interviews to help people track and understand what is going on. However, its role as a public clearinghouse on otherwise secret deals will be stronger:

  • The new site is open-publishing, meaning anyone can register and upload material.
  • The website will contain as many land grab contracts as possible, releasing them into the public domain because the secrecy surrounding these deals is unacceptable. (Please contact us if you have any such documents to share. Anonymity will be respected.)
  • The website will serve as an active forum for debate and proposals on how to turn things around, with free and open space to write your own piece, comment on someone else’s or create new sections.

This land grab blog is an open project. Although currently maintained by GRAIN, anyone can join in posting materials or developing it further.”
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*In October 2008, GRAIN published “Seized: The 2008 land grab for food and
financial security“, one of the first overall analyses of this new trend. It is
available in English, French, Spanish, Arabic and Bahasa Indonesia.
http://www.grain.org/briefings/?id=212

*GRAIN also maintains a landgrab resource page bringing together GRAIN materials,
other organisations working on the issues, and relevant actions & events. There
are also a number of land grab maps from various sources.
http://www.grain.org/landgrab/
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Post written by Sarah Topps





Farmer Suicides

5 05 2009

Recently I was horrified to learn that mass suicide due to debt is not uncommon in some parts of the world. Some 1500 farmers committed suicide last month in India due to their debt from crop failure. A further 200 000 have died since 1997, a mere 12 years ago.

The article goes on to talk about Australian farmer suicides – they’re killing themselves at the staggering rate of one farmer every four days! I am blown away by these numbers – surely in a developed country such as Australia there must be other options for these people? I feel I have to question a system where individuals are driven not only to debt and unemployment, but actual suicide over their crop failures.

vandanashiva1Vandana Shiva is a well-known activist in this area, working mostly in India, she gives hope to the people, helping to organize countless protests and demonstrations against everything from major-scale dams and hydro-electric projects funded by the World Bank, to the maltreatment of individual squatters in the cities.

– Sarah Topps








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