Concept information
Preferred term
WWCA
Definition
- The World Water and Climate Atlas (WWCA)was developed jointly by the International Irrigation Management Institute (IIMI) and the Utah Climate Center at Utah State University. It aims at providing easily accessible climatic information necessary for the planning, design, operation, and management of water resources and irrigated agricultural systems. The atlas uses climatic data from over 56,000 stations world-wide with coverage from 1961 through 1990 and includes monthly and/or annual averages for evapo-transpiration, daily temperatures, precipitation, and the probability distributions of rainfall frequency and amount. The climatic factors are mapped at a 2.5 km resolution using state-of-the-art spatial interpolation techniques incorporating elevation modelling. The data sets contain best available data from international and local sources. The quality of the data varies, and has been partly improved by removing stations responsible for outlying values not explained by known effects. (Since there are many locations with sparse data, short periods of record, and spatially highly variable climate, it is still strongly recommended that the atlas be used together with local information.) Additional parameters included in the atlas are the moisture availability index that can be used to identify areas of rain-fed agricultura! l potential and to evaluate needs for irrigation and drainage, and the net evapo-transpiration which is an indication of the required depth of irrigation. Use of the atlas: 1. estimation of synthetic virgin stream-flow; 2. evaluation of flow development potential; 3. exploration of the impact of climate change on irrigated areas; 4. salinisation studies. For more information, link to "http://www.grida.no/cgiar/awpack/atlas.htm" Access and download the atlas software at "http://www.cgiar.org/iwmi/WAtlas/atlas.htm" [Summary provided by GRID] (en)
Broader concept
- V - Z (en)
URI
https://gcmd.earthdata.nasa.gov/kms/concept/1840f198-7392-4525-982b-e3ac47f84780
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