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As 80 percent of all freshwater is used for irrigation, monitoring this usage is critical to any global strategies regarding conservation. At present, considerable uncertainty exists about the spatial distribution of irrigated areas due to the absence of global mapping as well as problems with the accurate reporting of irrigation. Emphasizing practical mapping technologies based on remote sensing, this book provides actionable approaches for estimating water use from irrigated and rain-fed croplands on a national, continental, or global basis. Written by leading experts working at the forefront of this critical area, it offers case studies from a variety of continents highlighting the subtle requirements of each. From CRC, 2009.

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