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来源类型 | Working Paper |
规范类型 | 论文 |
Aqueduct Global Maps 2.1 | |
Francis Gassert; Paul Reig; Tien Shiao; Matt Landis, Research Scientist, ISciences, LLC; Matt Luck, Research Scientist, ISciences, LLC | |
发表日期 | 2015-04 |
出版年 | 2015 |
语种 | 英语 |
概述 | Executive SummaryThe Aqueduct Water Risk Atlas makes use of a framework, that includes 12 global indicators grouped into three categories of risk and one overall score. The data selection and validation process involves three steps:
Two measures of water use are required, water withdrawal, the total amount of water abstracted from freshwater sources for human use, and consumptive use, the portion of water that evaporates or is incorporated into a product, thus no longer available for downstream use. Withdrawals for the global basins are spatially disaggregated by sector based on regressions with spatial datasets to maximize the correlation with the reported withdrawals (i.e. irrigated areas for agriculture, nighttime lights for industrial, and population for domestic withdrawals). Consumptive use is derived from total withdrawals based on ratios of consumptive use to withdrawals from Shiklomanov and Rodda. Both withdrawals and consumptive use are coded at the hydrological catchment scale. Two metrics of water supply were computed: total blue water and available blue water. Total blue water approximates natural river discharge and does not account for withdrawals or consumptive use. Available blue water is an estimate of surface water availability minus upstream consumptive use. Modeled estimates of water supply are calculated using a catchment-to-catchment flow- accumulation approach, which aggregates water by catchment and transports it to the next downstream catchment. Water supply is computed from runoff (R), the water available to flow across the landscape from a particular location, and is calculated as the remainder of precipitation P) after evapotranspiration (ET) and change in soil moisture storage (ΔS) are accounted for (i.e., R = P – ET – ΔS). The runoff data is courtesy of NASA Goddard Earth Sciences Data and Information Services Center’s Global Land Data Assimilation System Version 2 NOAH v. 3.3 land surface model for the years 1950 to 2010. |
摘要 | 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. |
主题 | Water |
标签 | water ; water risk ; water stress |
URL | https://www.wri.org/publication/aqueduct-global-maps-21 |
来源智库 | World Resources Institute (United States) |
资源类型 | 智库出版物 |
条目标识符 | http://119.78.100.153/handle/2XGU8XDN/27935 |
推荐引用方式 GB/T 7714 | Francis Gassert,Paul Reig,Tien Shiao,et al. Aqueduct Global Maps 2.1. 2015. |
条目包含的文件 | 条目无相关文件。 |
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