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Sharing knowledge to build rich, sustainable lives.

Appropedia is for collaborative solutions
in sustainability, appropriate technology, poverty reduction, and permaculture.

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Aprologo-old.png As we approach our ten-year anniversary, we are looking at how best to support Appropedia in the next ten years. Please share your thoughts with us on the idea of appointing an Executive Director.


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Sectional view of sand dam
Sand dams. Drought is the most serious natural hazard facing Eastern Africa in terms of severity and frequency of occurrence. The most seriously affected areas are Arid and Semi Arid Lands (ASALS) that face frequent reduction of water or moisture to significantly below the normal or expected amount Pastoralists and agro pastoralists who occupy this vast region barely meet basic water requirements. Consequently they suffer from livelihood losses, hunger, diseases, conflict and internal displacements. The worst affected are women and children who may have to walk all day long in search of water.

Due to limited and unreliable rainfall most rivers are ephemeral seasonal sandy bed streams and only experience heavy water run-off for short periods of time after rain. During such periods of high flows, large quantities of sand are transported downstream while others get trapped on the upstream sides of rocks ledges along the stream. Such sand traps form natural aquifers that are capable of providing clean adequate water if well harnessed. Using appropriate technologies this can be exploited for water storage in the form of sand dams.

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Decreasing turbidity to optimize solar water disinfection

Salt and sunlight can actually be used to clean water with the SODIS method.

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Community action news

Parc des Buttes.jpg
Dec 7 Pollution: Paris makes public transport free for second day [1]

Dec 3 Light of Hope in the Middle of the Crisis: Solar Power to Light Up Syrian Refugee Camp in Jordan [2]

Dec 3 France: Ce village français anticapitaliste et 100 % autonome a tout compris ! [3]

Dec 2 Environment quality: Four of world's biggest cities to ban diesel cars from their centres [4]

Dec 2 Sydney students pioneer Australian-first solar apartment project [5]

Read More...


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The only known photograph of Chief Seattle, taken 1864
The rivers are our brothers. They quench our thirst. They carry our canoes and feed our children. So you must give to the rivers the kindness you would give any brother.

Chief SeattleW
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Hot topics / In the news

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A windmill is used to power a water pump which fills a swimming pool.
Appropriate technology (AT) is technology that is designed with special consideration to the context of its use - including environmental, ethical, cultural, social, political, and economical aspects of the community it is intended for. With these goals in mind, AT proponents claim their methods require fewer resources, are easier to maintain, and have less of an impact on the environment compared to techniques from mainstream technology, which they contend is wasteful and environmentally polluting.

The term is usually used to describe simple technologies proponents consider suitable for use in developing nations or less developed rural areas of industrialized nations. This form of "appropriate technology" usually prefers labor-intensive solutions over capital-intensive ones, although labor-saving devices are also used where this does not mean high capital or maintenance cost. In practice, appropriate technology is often something described as using the simplest level of technology that can effectively achieve the intended purpose in a particular location. In industrialized nations, the term appropriate technology takes a different meaning, often referring to engineering that takes special consideration of its social and environmental ramifications.

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ENGR 215 Introduction to Design projects – Spring 2010: World Shelters: One lab of the Spring 2010 semester of Engineering 215 worked worked with World Shelters to design and improve upon structures by leveraging the resources of Haiti and World Shelters.

Spring 2010 ENGR 215 Intro to Design Projects - World Shelters
Simple Square
Reduces the amount of unique connecting pieces needed to construct World Shelter's JAS Shelter  
Rock Roots JAS
JAS Shelter retrofits to withstand a Class One hurricane  
Make it Complete with Papercrete
Inner wall system incorporates the use of papercrete, a weatherproof and fire resistant material  
Rubble to Resource
Rubble trench foundations utilize rubble to rebuild Haiti  
Bags of Shelter
Earthbag shelter designed for use as a transitional shelter  
Titanium Sun Shield
Primer and topcoat application over the polypropylene exterior of a WorldShelters temporary structure  
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Energy

Solar
Water
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