Water for people.pdf - WHO Thailand Digital Repository

3 0 / S E T T I N G T H E S C E N ESigning Progress: Indicators Mark the WayStep 5: Assessing data availability 44Step 6: Developing indicators 46Observational Challenges for Indicator Development 50Hydrologic information base 50Information based on human impacts and stewardship 51Limitations, Caveats and Discussion Points 51The issue of the right scale 51Table 3.5: Sample of indicator values per country on water supply andsanitation 52Table 3.6: Overview of a number of indicators, their aims and the correctspatial scale of their use 52Figure 3.7: Values of the Water Stress Index presented on four differentspatial scales: country, grid cell, regional and watershed 53Figure 3.8: A time series of the oxygen concentration and living oganismsin the Rhine River since 1900 54Geospatial presentation of indicators 55Figure 3.9: Nile basin map showing climactic moisture index 56Figure 3.10: Nile basin map showing indicator on people with droughtstress threshold 56Implications for tracking changes through time 55Misinformation and misinterpretation 55Data availability and implications 57Conclusions 58Box 3.5: Achievements 58References 58