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13 - water Assignment#3 Memo about Community/Partner...

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9/16/11 1 Assignment #3 – Memo about Community/Partner Next week you and your manager are scheduled for a meeting with your community partner. To prepare for this meeting, your task is: o to brainstorm the background topics that will be necessary to investigate in order to better understand your community partner and the community that they serve, and o assign each team member a subset of these topics to investigate. Once you’ve investigated your topics, you will relay your findings via memo to Dr. Sanchez. This memo should include: o a brief summary of your findings o a list of sources that you consulted o a list of at least 5 questions to ask the partner at the meeting to provide further background and/or clarify your findings. water Engineering 100:800 Fall 2011 The water crisis 884 million people lack access to safe water supplies ~ 1 in 8 people 3.575 million people die each year from water-related disease o claims more lives than any war claims through guns People living in slums often pay 5-10 times more per liter of water than wealthy people living in the same city An American taking a five-minute shower uses more water than a typical person in a developing country slum uses in a whole day The water planet 70 percent of globe 331 million cubic miles 3% is freshwater ¾ of freshwater is ice 50% of the rest is embedded in rock 0.375% is accessible in lakes, rivers, groundwater and the atmosphere 0.007% is readily accessible Google Earth Hydrologic cycle Water usage 31% of available water used for irrigation Most agricultural activities are water guzzlers
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9/16/11 2 Ways to minimize water usage Hold water in the soil – organic matter acts like a sponge 1 ft of rich soil holds as much water as a 3-inch deep pond Use ground contours to catch water (swales) Use plants that are suitable to the available water Plant densely to create shade can reduce loss due to evaporation by over 60% Mulch (slows evaporative loss) Catch water for re-use Rainwater harvesting Archeologists in Crete have discovered rainwater collection systems dating back to 1,700BC
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