Knoema

Knoema, an Eldridge business, is the most comprehensive source of global decision-making data in the world. Our tools allow individuals and organizations to discover, visualize, model, and present their data and the world’s data to facilitate better decisions and better outcomes.

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    • सितम्बर 2017
      Source: Knoema
      Uploaded by: Knoema
      Accessed On: 07 सितम्बर, 2017
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      The Water Quality Index (WQI) is a multi-dimensional index calculated to examine the factors that influence changes the water quality and provide a comparison tool for the worst practices. The index incorporates 7 performance indicators which have been calculated on the basis of reliable data from a range of international organizations and academic sources. It takes into account topics mentioned below.  All the indicators are from the worst to the best situation and normalized from 0 to 100%, where 100 is the worst. Conservation/Infrastructure:National protected areas (Terrestrial Protected Areas (National Biome Weights)). Obtained using data from Environmental Performance Index, 2016. The target for this indicator is the sample minimum which is equal to 0% and the low-performance benchmark is equal to 100%, a figure observed as the sample maximum. Water system pressure: Data used for this indexes was sourced from the WB’s WDI 2016Freshwater withdrawal (Annual freshwater withdrawals, total (% of internal resources)). The target for this indicator is the sample maximum which is equal to 8,935% for Bahrain and the low-performance benchmark is equal to 0,02%, a figure observed as the sample minimum.Agricultural water withdrawal (Annual freshwater withdrawals, agriculture (% of total freshwater withdrawal). The target for this index is set equal to the sample maximum of 99,48% and the low-performance benchmark is the sample minimum of 0.0%. Supply/Access:Population using safely managed drinking water services. This data is taken from the United Nations Statistics Division. The target is set at the sample minimum, which is an average score of 39.96, and the low-performance benchmark is set at the sample maximum of 100. Sanitation:Population using improved sanitation. The data is obtained from the United Nations Statistics Division. The target is set at the sample minimum, which is an average score of 6,72, and the low-performance benchmark is set at the sample maximum of 100. Pollution:Wastewater treatment Obtained using data from Environmental Performance Index, 2016. The target for this index is set equal to the sample minimum of 0 % and the low-performance benchmark is the sample maximum of 100%. Water and Women:Women age 15+ usually collect water. Data from the world's Women 2015 report by the United Nations Statistics Division. The target for this index is set equal to the sample maximum of 82 % and the low-performance benchmark is the sample minimum of 0.4%. The overall index was estimated as an arithmetic mean and normalized too.The index is calculated as a percentage from 0% to 100% where 100% represents the Worst Performance Across Year of Water Issues. *The general formula to normalize the indicators is then given by 𝐼𝑛𝑑𝑖𝑐𝑎𝑡𝑜𝑟 = (Observed value − lower performance benchmark)/ (Target − lower performance benchmark)
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