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GEMS/Water: Unlocking Data for Global Water Assessment

GEMS/Water is expanding its global network to collect and manage water quality data, promoting data integrity tools, and enhancing the capacity of developing countries. Discoverability, visualization, and interoperability are key to maximizing the value of data. Plans for the future include filling data gaps and integrating GEMStat with decision-support software.

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GEMS/Water: Unlocking Data for Global Water Assessment

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  1. 3 Keys to Data for All World Water Forum-5 Istanbul, March 20, 2009

  2. Overview 1. What does GEMS/Water do? 2. 3 keys to data access 3. Plans for the future

  3. 4 Core Activities • Expanding GEMStat, the global inland water quality database and international network. • Undertaking research, indicator development, and modelling for global environmental assessment processes. • Promoting data integrity (QA/QC) tools and resources. • 4. Building the capacity of developing countries to collect and manage water quality information.

  4. Status of GEMS/Water Global Network Region # of Stations # of Values Date Range Africa 285 276428 1977-2008 Americas 2051 1742281 1965-2006 Asia 441 684455 1971-2008 Europe 343 943631 1978-2007 Oceania 95 355061 1979-2008 Totals 3215 4001856 1965-2008

  5. Snap Shot of Global Nitrogen Data Note the decreases in many parts of the world, likely due to effective policy responses. A comprehensive global assessment would benefit since N affects drinking water, fisheries, and agriculture.

  6. Declining Pesticides Three Chinese rivers following implementation of a ban on HCH use.

  7. Index Calculation 100 100 100 Excellent Good Concentration Concentration WQ Index =100 –  (F12 + F22 + F32 ) 1.732 Acceptable Unacceptable 0 0 0 1990 1990 1990 1994 1994 1994 1998 1998 1998 2002 2002 2002 1990 1990 1994 1994 1998 1998 2002 2002 • Important WQ variables compared to appropriate guidelines; results combined to produce a single number categorizing WQ as excellent, good, fair, marginal, poor. Where: F1 = percentage of failed variables (scope) F2 = percentage of failed tests (frequency) F3 = amount by which failed tests exceed guidelines (magnitude)

  8. There are no technical barriers to sharing data, only institutional ones

  9. Key #1 – Discoverability – Publish Data on the Internet

  10. Benefits from Being Discoverable • More people have access • Data have value when they are used; more use means more value • Broader scope for assessments • Water authorities can view their situation in a wider context – local to global

  11. Key #2 – Visualization – Google Earth

  12. Benefits from Vizualization • See and fix bugs • Better and faster assessments • Better and faster decision-making

  13. Key #3 – Interoperability • GEMStat can “talk” to other online databases • Built using open standards and open web services • Result is flexibility to identify and fit services that fit particular needs • One example is SDI-East Africa

  14. Plans for the Future • Continue to fill gaps • Integrate GEMStat with THREATS – decision-support software • GEMSoft for data input • Broader visualization and analysis – GIS, modelling

  15. UNEP GEMS/Water Programme Thank You www.gemswater.org and www.gemstat.org

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