Writing Assignment #3
Essays (200 points total).
1. Discuss the issues of drinking water availability and quality in the Southwestern U.S.,
including San Diego County.
In your essay, include a discussion of:
local climate
population changes, especially since World War II
local vs. imported water
"waste" treatment and recycling attitudes ("toilet to tap")
Your answer should be no less than 700 words.
2.
(100 points)
Explain the issues of Climate Change.
In your essay, include discussions of:
greenhouse gases, comparing Earth to Venus and Mars
the Keeling Curve, extrapolated back 800,000 years
ice ages, including the one we're in now
sea level: past, present and future
ocean acidification
methane released from permafrost and ocean floor
Your answer should be no less than 700 words.
(100 points)
For these questions, check the "Study Materials" in the folder above and also study the
links and videos in Blackboard.
Study Guide for Water Resources
(extracted from an assignment in Environmental Geology)
Water, water, everywhere, nor any drop to drink.
Samuel Coleridge
Water is the one Earth resource that all life absolutely, positively has to have to exist. We humans
can (and will, probably) be able to live without fossil fuels, but we must have water.
Before you begin, be sure you have:
1. studied the appropriate chapters (16, 17, 18, 19, 20 and 21) in your text, and successfully
completed the homework on same.
2. examined all of the extra materials in the Mastering Study Area pertaining to these chapters
3. watched the Earth Revealed video #21 on groundwater (in Videos in Blackboard)
THE BIG PICTURE: History of water in the west, beginning with John Wesley Powell
John Wesley Powell was the amazing one-armed Civil War Major (arm lost at the battle of Shiloh), who was a geologist
from Illinois who led the first expedition to explore the Colorado River through the Grand Canyon and the American
Southwest in general. There is a book that everyone in the American West should read. It is called Cadillac Desert: The
American West and Its Disappearing Water, written by Marc Reisner (1986). From about 100 degrees west longitude to
the Pacific Ocean, the American West has a long history of too little water to support civilizations that have developed
there, going as far back as the Anasazi, more than a thousand years ago. You could buy this book from Amazon as a
Kindle edition (http://www.amazon.com/Cadillac-Desert-American-Disappearing-Revised-ebook/dp/B001RTKIUA) or at
least read the WikiPedia entry at http://en.wikipedia.org/wiki/Cadillac_Desert to get a general idea of the subject. I have
found PDF's of the first four chapters of the book online, and they can be found on blackboard in the same area you see
this file.
Next, consider our current predicament in California. I'll begin with a deliberately provocative statement: Southern
California is a DESERT! When Cabrillo "discovered" San Diego by landing at Point Loma in 1542, the vegetation would
have looked very much like the chaparral seen when you hike down the Bayside Trail. There is no similarity between that
landscape and what we see in our urban and suburb and residential neighborhoods. Southern California, including San
Diego, lives on imported water, brought to us via great aqueducts from Northern California and the Colorado River. The
population of San Diego County has exploded from approximately 200,000 just before World War II to over 3,000,000
today.
Let's look at some contemporary problems with our use and abuse of H 2O in the American West.
Case Study A. Groundwater as a renewable resource
The Ogallala Aquifer is a body of sediments (now, sedimentary rock) that accumulated from streams
flowing eastward from the Rocky Mountains from about 18 million through 5 million years ago. It is
now a body of rock that ranges between 0 and 400 feet thick, and extends from the Colorado Front
Range east as far as eastern Nebraska, north to southern South Dakota, and south to West Texas,
near Midland and Odessa. This map, pulled from Wikipedia
(http://en.wikipedia.org/wiki/Ogallala_Aquifer) shows the extent and thickness of the Ogallala Aquifer.
Recharge of this water resource occurs at the mountain
front, and the water slowly percolates to the east, where it
gets pumped out of the ground relatively quickly. Much of
this agricultural land used to be “dry-land” farmed – that
is, they used whatever rainfall Mother Nature gave them.
But advances in technology allowed the introduction of
center-pivot irrigation, pumping lots of water out of the
Ogallala Aquifer, greening the high plains in more ways
than one.
The picture above is a Google Earth
image of Guymon (in the Oklahoma Panhandle) – most of the green dots are individual half-mile
diameter plots with a single center-pivot system feeding water to them.
Please study the Wikipedia article at http://en.wikipedia.org/wiki/Ogallala_Aquifer, and then watch this
video: Water Scarcity on the Texas High Plains: The Ogallala Aquifer
(http://cookingupastory.com/water-scarcity-on-the-texas-high-plains-the-ogallala-aquifer).
Case Study B. Bottled Water
This is a subject I feel strongly about: an economic and ecological disaster on many levels. In class,
I’ve been known to foam at the mouth, but you’ll be spared that spectacle. “Who owns the water?” is
a question that Americans have struggled with since the early days of westward expansion. We live
in a county that averages less than 10 inches of annual precipitation, which classifies it as a virtual
desert. We import water from the Sacramento River Delta via the California Aqueduct and from the
Colorado River via various aqueducts. Some water is captured from runoff from local rainfall. Yet we
have lush lawns and gardens that require that we irrigate with this water imported at great expense.
The quality of municipal tap water is carefully monitored, and the results of testing are carefully
monitored. However, many people spend considerable money on individual bottles of drinking, which
costs more per gallon than gasoline, but don’t know what impurities it might contain. Three large
multinational companies (Nestlé, Coca-Cola and Pepsi) produce a substantial portion of this water.
Please study the Wikipedia article at http://en.wikipedia.org/wiki/Bottled_water, especially the section
“Bottled water versus tap water.” Next, watch the video “Tapped” (2009), which you’ll find in
Blackboard and check out the official web site for the movie at http://www.tappedmovie.com/ - note
that there is a LOT of attempted manipulation of the information by the powers-that-be, so read everything with
a jaundiced eye! Read all of “The Issues” discussed from the home page.
Case Study C. Fracking
Hydraulic Fracturing, or “Fracking”, is a method of extracting natural gas from subsurface reservoirs
that weren’t available by simply drilling and pumping. This is accomplished by drilling a vertical hole
down to the rock layer of interest, then drilling horizontally within that layer, which is typically shale
(an aquiclude). Then, to get the natural gas to flow, the rock is fractured by pumping various
chemicals under high pressure into the deep layer. Generally, the vertical drill-hole passes through
aquifers used by local citizens for their drinking water, so the gas well must be carefully lined and
sealed to prevent contamination of drinking water. You may have seen advertisements from the oil
industry indicating that they are being very careful in their extraction, but the results so far have been
mixed, to try to be fair.
Here’s yet another Wikipedia article: http://en.wikipedia.org/wiki/Hydraulic_fracturing, noting the
graphic illustrating how it works, and consider the chemicals used which could potentially contaminate
groundwater. Another documentary video: “Meet the Frackers” – it can be viewed in YouTube at
https://www.youtube.com/watch?v=9GAEXh63k3w or downloaded from Blackboard as an MPEG-4
file.
Case Study D. "Waste" Water Treatment
OK, so you've brought drinking water to your residence from hundreds of miles away, at great expense. You
took showers, made coffee, made soup, washed your dishes, watered the lawn and flushed the toilet. Now
what to do with the soiled water? Assuming you live in a city which is part of a sewage treatment district, away
it goes to some sort of a facility to "treat" (hopefully, purify) the water to return it to the water supply. Think
Hydrologic Cycle: evaporation, condensation, precipitation, infiltration, runoff, etc. I live in Point Loma, near
San Diego's major sewage treatment facility, the history of which can be found at
http://www.sandiego.gov/mwwd/general/history.shtml - check it out. Note what is done with the "treated" water.
There is a long pipe which delivers the water into about 300 feet of water in the ocean 4.5 miles west of the
plant, which you can see in the Google Earth image here.
This water cost a lot to procure, so why do
we just throw it away? Where is "away"
anyway? There have been may attempts
over the years to bring this "waste" water
back into the reservoirs or groundwater
aquifers, but with no success thus far.
Reason number one is the "ick" factor calling the project "toilet to tap" is not a
good marketing ploy. But if you watched
the Earth Revealed video on groundwater
you learned that Orange County has been
doing just this kind of recycling for over 20
years! Further, the water we import from
the Colorado River has already passed
through the wastewater treatment plants of
many communities along the river, including Las Vegas.
Ultimately, all water is "toilet to tap" - most of the water on Earth has been here for billions of years.
CLIMATE CHANGE 2013
The Physical Science Basis
Working Group I Fact Sheet
The Working Group I contribution to the IPCC Fifth Assessment Report (WGI AR5) provides a
comprehensive assessment of the physical science basis of climate change. The report was developed
by an international team of scientists who were selected in May 2010. It went through a multi-stage
review process involving expert reviewers and governments. It will be presented to the IPCC member
governments for approval and acceptance in September 2013.
The Report
1 Scoping Meeting to outline 14 Chapters § Over 1000 nominations from 63 countries §
209 Lead Authors and 50 Review Editors from 39 countries § Over 600 Contributing
Authors from 32 countries § Over 2 million gigabytes of numerical data from climate model
simulations § Over 9200 scientific publications cited §
§
The First Order Draft Expert Review
§ Nearly
1500 individuals registered § 21,400 comments from 659 Expert Reviewers from
47 countries §
The Second Order Draft Expert and Government Review
§ Over
1500
individuals registered §
31,422
comments from
800
Expert Reviewers from
46 countries and 26 Governments §
The Final Government Distribution
§ 1855 comments from 32 Governments on the Final Draft Summary for Policymakers §
Total Reviews
§ 54,677 comments § 1089 Expert Reviewers from 55 countries § 38 Governments §
The WGI Approval Session
§ 23-26 September 2013, Stockholm, Sweden § The Summary for Policymakers will be
approved line-by-line by up to 195 Governments §
WGI Technical Support Unit c/o University of Bern
Zaehringerstrasse 25 3012 Bern Switzerland
telephone +41 31 631 5616 fax +41 31 631 5615 email wg1@ipcc.unibe.ch www.ipcc-wg1.unibe.ch
Photo © Yann Arthus-Bertrand / Altitude
Additional information is available from www.climatechange2013.org
The IPCC’s Fifth Assessment Report (AR5) contains contributions from three Working Groups. Working
Group I assesses the physical science basis of climate change. Working Group II assesses impacts,
adaptation and vulnerability while Working Group III assesses the mitigation of climate change. The
Synthesis Report draws on the assessments made by all three Working Groups.
The Working Group I contribution to the AR5 (WGI AR5) has 14 chapters, a Technical Summary and a
Summary for Policymakers. The report includes an assessment of observations of the climate system,
with separate chapters covering changes in the atmosphere and surface, the ocean and the cryosphere,
as well as information from paleoclimate archives. There are chapters covering the carbon cycle, the
science of clouds and aerosols, radiative forcing and sea level change. Coverage of climate change
projections is extended by assessing both near-term and long-term projections. Climate phenomena
such as monsoon and El Niño and their relevance for future regional climate change are assessed. An
innovative feature of the WGI AR5 is the Atlas of Global and Regional Climate Projections (Annex I),
which is intended to enhance accessibility for users and stakeholders.
The WGI AR5 involved experts from around the world with expertise in the many different disciplines
necessary to produce a comprehensive assessment of the physical science of climate change according
to the approved chapter outlines. There were 209 Lead Authors and 50 Review Editors. More than 600
additional experts were invited by the Lead Authors of the report to be Contributing Authors and to
provide additional specific knowledge or expertise in a given area.
Lead Authors and Review Editors were selected for their scientific and technical expertise in relation to
the approved chapter outlines for the WGI AR5 from lists of experts nominated by governments and
IPCC observer organisations. Regional and gender balance were also considered, as well as ensuring
the involvement of experts who had not worked on IPCC assessments before.
The author teams assessed thousands of sources of scientific and technical information in the course of
their work on WGI AR5. Priority is given to peer-reviewed literature if available and over 9,200
publications are cited in the WGI report.
Multiple stages of review are an essential part of the IPCC process. Both expert reviewers and
governments are invited at different stages to comment on the scientific and technical assessment and
the overall balance of the drafts. The review process includes worldwide participation, with hundreds of
experts reviewing the accuracy and completeness of the scientific assessment contained in the drafts.
The WGI AR5 will be presented to the IPCC member governments for approval and acceptance in
September 2013.
IPCC WGI Technical Support Unit, Bern
30 August 2013
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