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This technical note describes the data and methodology used to calculate BWS-China, building on the methodology described in previous Aqueduct publications (Shiklomanov and Rodda 2014; Gassert et al. 2013). In general, results show that Aqueduct’s global baseline water stress indicator maps and BWS-China maps share similar spatial patterns. However, upon closer examination, the maps show differences in some catchments. More detailed water withdrawal data by sector used in BWS-China can reveal new spatial patterns.

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More than 100 companies have now committed to use the best science available as the basis for setting greenhouse gas emissions-reduction targets. Targets informed by science might well be effective in reducing risks posed by water as well—but there are hurdles to overcome first.

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While droughts, floods and increasingly rapid groundwater depletion are cause for concern, this year presents unprecedented opportunities to pursue better water management. Director of WRI's Global Water program Betsy Otto explains.

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Electricity for water treatment can be as much as one-third of a city's energy bill, and these "energy-water nexus" issues are becoming more and more concerning for businesses. A new GE and WRI report explores three innovative solutions for energy and water management.

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Water scarcity challenges industries around the world. Global population growth and economic development suggest a future of increased demand, competition, and cost for limited freshwater supplies. Scarcer water, in turn, creates new challenges for energy supply because coal, oil, gas, and electricity production can require massive amounts of freshwater. Yet many countries will need more energy for energy-intensive water treatment options, like seawater desalination, to meet their growing demand for water. This report illustrates these emerging risks and offers ideas for finding solutions at the water-energy nexus.

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Coal production and power generation has driven Ningxia’s economy over the past decade. However, as an extremely thirsty industry, coal has put more stress on the area’s water supply and heightened competition with other users, including farms and households. A WRI working paper recommends developing a coordinated system to ensure sustainable development of water and economy in Ningxia.

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Decision-makers need future projections on water supply and demand. However, most of these decision-makers operate at the administrative or political scales, and therefore require country-level projections. This technical note utilized a spatial aggregation methodology to bring sub-catchment scale Aqueduct Water Stress Projections up to the country scale, fulfilling this need.

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In certain areas of the world, more than 80 percent of the local water supply is withdrawn by businesses, farmers, residents and other consumers every year. These areas are particularly vulnerable to episodic drought.

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Snow-capped mountain ranges no longer have snow. Citizens fear they'll lose access to water. And farmers continue to draw scarce groundwater.

So what can California do to shore up its dwindling water supply?

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The availability of freshwater resources to meet human demands has emerged as a top-tier global issue for both environment and development. However, many decision-makers lack the technical expertise to fully understand hydrological information.

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This working paper updates the 2013 Aqueduct Global Maps 2.0 Metadata Document. It describes the data sources and calculations for the Aqueduct Water Risk Atlas Global Maps. Complete guidelines and processes for data collection, calculations, and mapping techniques are described in the Aqueduct Global Maps 2.1: Constructing Decision-Relevant Global Water Risk Indicators.

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