Too Much & Too Little

Hiroko "Yoshi" Yoshida wrote this when she was working on an M.S. in Water Resources Management at the University of Wisconsin-Madison. Yoshi is from Tokyo, Japan. Yoshi wrote about some of the unique water challenges in Mexico City. Her second entry is a poem reflecting on what she learned about corn (or maize) in Mexico.

Mexico City is located at the bottom of the Basin of Mexico in the central plateau of Mexico. The surrounding mountain range created the shallow lakes during the rainy season. The Aztecs settled in this area in 14th century and constructed dikes to protect their capital city, Tenochitlan. After the Spanish conquest, flooding continued to be a threat to the city. Since then. the rivers have been diverted from the Basin of Mexico and lakes now cover only one one-hundreth of the original area. Drainage canals and dams were built to prevent flash flooding. These enormous (and expensive) efforts have been paid to keep Mexico City dry.

After hearing all of this, you might have a hard time understanding that the city is also actually short of water. In order to quench the thirst of this city of [more than] 20 million inhabitants, groundwater has been extracted more than twice fast as the replenishment rate. As a result, Mexico City is sinking, which could be as bad as 40 cm/year. Even with this rate of extraction, it is not enough to meet the water demand for this mega-city. The water distribution system of the Mexico City is old and it is also heavily damaged by sinking. It is estimated that 40% of the potable water is lost somewhere in the distribution system before reaching the city's water taps. (For comparison, the water loss rate for Los Angeles is 9% and 3.6% for Tokyo.) The other issue is the way people use water in the Mexico City. People in Mexico City, on average, use 300L of water a day. This is twice as high as in European countries, due to the low adaption of water efficiency measures such as low flush toilets.





A Rainbow for Corn

Before I needed only one color to draw corn: yellow!
The color of a corn cob with melting butter
The color of the famous corn head for cheering Huskers.

Then I added another color: green!
The color of the corn stove for corn silage
The color for a gigantic combine of John Deere
The color of the Lake Mendota with smelly algae bloom, ha.

Now I need more colors to draw corn.
Pink and blue and white to celebrate the diversity of corns grown in Mexico;
Black for corn fungi and brown for the soil on which a corn grows;
Red for people and grey for the thunder storm bringing rain to the land.
Then, I need lots and lots of greens
for the forest where the humble ancestors of corn plants still live.

And one color to add to this rainbow for corn:
The color of light from the sun and moon,
The color of Mexico, where life and death, happiness and sadness,
everything is as vivid and bright as it could be.







Keywords:Yoshi's Portfolio Entry   Doc ID:56704
Owner:Antonio A.Group:DS 473 Field Study Abroad
Created:2015-09-23 23:07 CDTUpdated:2015-09-23 23:07 CDT
Sites:DS 473 Field Study Abroad
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