Freshwater resources adapting to climate change
Download
1 / 23

freshwater resources adapting to climate change - PowerPoint PPT Presentation


  • 151 Views
  • Updated On :

Freshwater Resources Adapting to Climate Change. Jon Spalding November 20 2007. Motivation.

Related searches for freshwater resources adapting to climate change

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'freshwater resources adapting to climate change' - emily


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Freshwater resources adapting to climate change l.jpg

Freshwater Resources Adapting to Climate Change

Jon Spalding

November 20 2007


Motivation l.jpg
Motivation

  • “By 2025, 1.8 billion people will be living in countries or regions with absolute water scarcity, and two-thirds of the world population could be under conditions of water stress, the threshold for meeting the water requirements for agriculture, industry, domestic purposes, energy, and the environment (UN Water 2007).”

UN Environment Programme: “Global Environment Outlook 4” Part 4, 2007

http://www.unep.org/geo/geo4/media/ aka GEO-4


Overview l.jpg
Overview

  • Where does fresh water come from?

  • How is it used?

  • What impact does climate change have on freshwater availability?

  • What technologies and techniques can help humans to adapt?


Fresh water comes from the ocean l.jpg
Fresh Water Comes From the Ocean

2

3

4

1

5

6

Image credit: http://ga.water.usgs.gov/edu/watercycle.html


1 currents and water temperatures determine where and how much ocean water evaporates l.jpg
1. Currents and water temperatures determine where and how much ocean water evaporates

UN Environment Programme: “Global Environment Outlook 4” Part 4, pg. 119

http://www.unep.org/geo/geo4/media/


2 atmospheric conditions determine where evaporated water is condensed and deposited as rain l.jpg
2. Atmospheric conditions determine where evaporated water is condensed and deposited as rain

ç Kundzewicz, Z.W., L.J. Mata, N.W. Arnell, P. Döll, P. Kabat, B. Jiménez, K.A. Miller, T. Oki, Z. Sen and I.A. Shiklomanov, 2007: Freshwater resources and their management. Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, M.L. Parry, O.F. Canziani, J.P. Palutikof, P.J. van der Linden and C.E. Hanson, Eds., Cambridge University Press, Cambridge, UK, 173-210.


3 freshwater storage quantity and duration in ice and snow is critically dependent on temperatures l.jpg
3. Freshwater storage quantity and duration in ice and snow is critically dependent on temperatures

  • Glacier and snow-fed river systems will experience increased winter runoff, decreased spring/summer runoff, and potential decreased precipitation as temperatures increase


Slide8 l.jpg
4. Snowmelt and rain form streams and rivers which transport stored water to natural and man-made lakes

  • Increased floods will decrease water quality

  • Increasing lake and waterway temperatures will decrease water quality

  • Taxed reservoirs will become low quality (ex: Lake Chad)


5 rainwater infiltrates underground aquifers recharges ground water l.jpg
5. Rainwater infiltrates underground aquifers (recharges ground water)

  • Many underground aquifers are heavily taxed in arid climates, and will be increasingly relied upon.


6 sea level rise l.jpg
6. Sea level rise ground water)

  • Saline Intrusion

  • Sea level rise may cause problems for waste treatment outlets


Freshwater end use l.jpg
Freshwater End-use ground water)

  • 70% of freshwater is used for agricultural irrigation.


Slide12 l.jpg

Image credit: http://ga.water.usgs.gov/edu/earthwherewater.html


Another view l.jpg
Another view http://ga.water.usgs.gov/edu/earthwherewater.html

  • UN Environment Programme: “Global Environment Outlook 4” Part 4, pg. 118 http://www.unep.org/geo/geo4/media/


Trends in population and freshwater withdrawals by source 1950 2000 u s l.jpg
Trends in population and freshwater withdrawals by source, 1950-2000* (U.S.)

*US Geological Survey, “Estimated Use of Water in the United States in 2000” http://pubs.usgs.gov/circ/2004/circ1268/


Adaptation l.jpg
Adaptation 1950-2000* (U.S.)

  • Flexibility

  • Robustness

  • Prediction


Slide16 l.jpg
IWRM 1950-2000* (U.S.)

  • “capturing society’s views, reshaping planning processes, coordinating land and water resources management, recognizing water quantity and quality linkages, conjunctive use of surface water and groundwater, protecting and restoring natural systems, and including consideration of climate change.”


Methods of extending water resources l.jpg
Methods of extending water resources 1950-2000* (U.S.)

  • Water conservation

  • Reclamation

  • conjunctive use of surface and groundwater

  • desalination of brackish water

  • Rainwater harvesting

  • Ocean desalination


Conservation l.jpg
Conservation 1950-2000* (U.S.)

Plastic covered, drip irrigation farming in Israel (GEO4 pg 143)


Desalination a last resort l.jpg
Desalination--a last resort? 1950-2000* (U.S.)

  • Pacific Institute: “Desalination, With a Grain of Salt A California Perspective”


Slide20 l.jpg

Could Nuclear Power By The Answer To Fresh Water?

http://www.sciencedaily.com/releases/2007/11/071120082429.htm


Example local reactions l.jpg
Example Local Reactions Cravens. See her post at

  • Progressive pricing of water proposed in China

  • http://www.chinadaily.com.cn/english/doc/2005-05/11/content_441000.htm

  • Australia combating 100 year drought with $8 billion water works plan http://www.bloomberg.com/apps/news?pid=20601012&refer=commodities&sid=ayLeMw2JbzeE

  • California relies on various resources


Slide22 l.jpg


Concluding remarks l.jpg
Concluding remarks Resources in Southern California”

  • California--the worlds 5th largest economy is facing a water emergency

  • Water shortage--a wake up call from global warming?

  • Definitive lack of preparedness from local and national government (ex: Georgia, San Diego)

  • Large scale problem, requires widespread government action and cooperation from individuals

  • Discussion question: Can more advanced science and modeling play a larger role in resource (water) planning as the weather becomes more unpredictable?

  • Current trend seems to be that public reaction always follows disasters. Will public ever come to trust and ACT on scientific predictions?


ad