Global croplands and their water use from remote sensing and nonremote sensing perspectives

Prasad S. Thenkabail, Munir Ahmad Hanjra, Venkateswarlu Dheeravath, Muralikrishna Gumma

Research output: Book chapter/Published conference paperChapter (peer-reviewed)

18 Citations (Scopus)

Abstract

Croplands are the largest user of water worldwide. Much of the water is used for food production, making global croplands and their water use important to world food security. Of all the water used by humans, croplands consume an overwhelming proportion (60%–90%; Thenkabail et al. 2009a; Thenkabail et al. 2009b; Thenkabail et al. 2009c). There are two types of cropland water use (Falkenmark and Rockström 2006): (1) green water use by rain-fed croplands from the unsaturated soil zone and (2) blue water use by irrigated
croplands from rivers, reservoirs, lakes, and from saturated zones or groundwater aquifers and rain over irrigated croplands (Hoff et al. 2010; Rockström et al. 2008). However, alternative demands for land water use are increasing steeply due to urbanization (Deyong et al. 2009), industrialization (Liu et al. 2005), environmental flows and ecosystem services (Gordon, Finlayson, and Falkenmark 2009), maintaining water quality (and associated health of the populations), and recreational and other demands (Gordon, Peterson, and
Bennett 2008).
Original languageEnglish
Title of host publicationAdvances in Environmental Remote Sensing
Subtitle of host publicationSensors, Algorithms, and Applications
EditorsQihao Weng
Place of PublicationBoca Raton, FL
PublisherCRC Press
Chapter16
Pages383-419
Number of pages37
ISBN (Electronic)9781420091816
ISBN (Print)9781420091755
Publication statusPublished - 2011

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