global engineering challenge
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Global Engineering Challenge
Cost Effective Rain Water Collection and Storage Solutions
By Josie, Alex, Jagnesh, Justin, Steve and Matt
Devikulam – Tamil Nadu, India
http://www.ewb.org.au/explore/initiatives/2011ewbchallenge
http://www.buzza.in/Gramap2/Devikulam_information.html
photos from http://www.buzza.in/Gramap2/Devikulam_photos.html
info from http://vista.shef.ac.uk/webct/urw/lc19897.tp0/cobaltMainFrame.dowebct
http://vista.shef.ac.uk/webct/urw/lc19897.tp0/cobaltMainFrame.dowebct (survey)http://vista.shef.ac.uk/webct/ContentPageServerServlet/briefs/resources/Devikulam_Taps.pdf
http://vista.shef.ac.uk/webct/ContentPageServerServlet/briefs/resources/Devikulam_Map.pdf
INITIAL IDEAS
http://www.unep.or.jp/ietc/publications/urban/urbanenv-2/9.asp http://www.sintex.in/solutions.html
Options: Tank ConstructionBamboo Tank -sustainable: recycle bamboo baskets skill for the villagers -varying capacities -bamboo plantation far from village -relatively expensive -bamboo is slow to mature
Jars -sustainable: skill for villagers local / readily available materials -form of income -reusable moulds -varying capacity/heights -heavy / hard to move -danger of stale water
Jar being made
Info. and Pictures from: http://www.wateraid.org/
Options: Guttering MaterialsGalvanised Steel -long life -corrosion can be overcome -recyclable / reusable -more distributors / manufacturers -heavier -relatively expensive -water that runs down steel guttering is cleaner PVC -cheap -lightweight -less weather resistance -very difficult to recycle, it is a thermoset polymer -harder to attach -much shorter life spanWood -has a short lifespan -not a very clean form of guttering
Gutter Setup
Options: Filter MaterialsPebbles -cleaner water -not sufficient on its ownGravel -prevents clogging of pipes with larger obstructions -not sufficient on its ownSand -pre filter for particulates -not sufficient on its ownCharcoal -absorbs agro-chemical contaminants -need a large amount per person / litre (4.5kg per
person per year) - readily available in villages
These will be combined to make the filter as it will be very cheap
Example of a Filter System
Our Final Solution Galvanised steel guttering
‘Jar’ storage tanks
Sand, Charcoal, Gravel filter
Hand pump
http://www.nabuur.com/en/village/nakyerongosa/project/task/domestic-rainwater-harvesting-through-construction-water-jars
Our Final Solution
Costing and Future PlanningThe initial cost of the materials needed to build the rain-harvesting mechanism for each house.
Materials
Cost
Charcoal -Gravel -Sand -Hand pump (Suction Pump) £37Jars £35Galvanised steel ≈£40
Convenience Safe water with adequate sanitation. The possibility of maintenance by village
workers Have scheduled maintenance instead of
breakdown maintenance. Ensure this development boosts their
livelihood by creating commerce, industry and developments for everyone in Devikulam.
ReferenceCommunity Water Supply; The handpump Option, Rural Water Supply Project. UNDP/World Bank ISBN 08213-0850 1986.http://www.wateraid.org/uk/what_we_do/sustainable_technologies/technology_notes/244.asphttp://villageearth.org/appropriate-technology/appropriate-technology-sourcebook/water-supply-and-sanitation
Aims and Benefits
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