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GPO
The World Bank
Ecology, Food, Agriculture, Municipal, Sustainability
Sustainable Water Management in the U.S. Southwest
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Research Findings
Sustainable water management refers to managing resources in a way that the water needs of present and future generations as well as the broader ecology are met. While the concept of sustainability has received considerable attention, actual efforts have been limited as population growth has continued.
A 2010 study from the Nature Conservancy Center for Science and Public Policy, “Sustainable Water Management in the Southwestern United States: Reality or Rhetoric?” uses Arizona as a test case to analyze the pattern of stream-flow depletion across 18 watersheds. The study takes stock of the current water depletion rate and projects how conservation strategies could reduce the current pace of depletion. The study was published in PLoS ONE, a peer-reviewed, open-access online publication.
Using four scenarios, the authors modeled population growth and water use through 2050 to explore the potential effects of growth and water management strategies. Some of the study’s key findings include:
- In 2000, municipal water demand has already exceeded the full base flow capacity in two watersheds. During the same time, seven watersheds registered low current and projected demand.
- Under the base population projection, seven of the 18 rivers studied could be dewatered due to municipal demand.
- Implementing conservation scenarios that reduce water demand by 30% could mitigate the risk of the intermediate watersheds being dewatered.
- Water demand and river flows have key impact on the broader ecology. Unless conservation efforts are intensified, the number of threatened or endangered species would continue to grow.
The authors conclude by stating that because impacts from groundwater extraction are cumulative and cannot be immediately reversed, proactive water management strategies should be implemented where groundwater will be used to support new municipal demand.
Tags: water, conservation, biodiversity
Teaching Notes
Analysis assignments
Read the issue-related New York Times article titled "Water Use in Southwest Heads for a Day of Reckoning."
- If you were to rewrite the article based on knowledge of the study, what key changes would you make?
Read the full Nature Conservancy Center for Science and Public Policy study titled "Sustainable Water Management in the Southwestern United States: Reality or Rhetoric?"
- Summarize the study in fewer than 40 words.
- Express the study's key term(s) in language a lay audience can understand.
- Evaluate the study's limitations. (For example: Do the results conflict with those of other reliable studies? Are there weaknesses in the study's data or research design?)
Newswriting assignments
- Write a lead (or headline or nut graph) based on the study.
- Spend 60 minutes exploring the issue by accessing sources of information other than the study. Write a lead (or headline or nut graph) based on the study but informed by the new information. Does the new information significantly change what one would write based on the study alone?
- Interview two sources with a stake in or knowledge of the issue. Be prepared to provide them with a short summary of the study in order to get their response to it. Write a 400-word article about the study incorporating material from the interviews.
- Spend additional time exploring the issue and then write a 1,200-word background article, focusing on major aspects of the issue.
1 comment
Robert Smith
It all depends on the weather. In San Diego we have had so much rain the sustainability sounds possible. The rates the municipalities charge for water is the question and the tax policies of the cities which are unsustainable in fiscal responsibility.