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Colin J. Chartres, 'Water, investment and food security', 2014 | Water resources are already very scarce. With further demand from population growth, dietary changes, biofuel production, urbanisation and climate change, it will be extremely difficult to find enough supply to enable an increase in global food production by 70 per cent. There are, however, potential solutions that involve increasing water productivity, improved water storage, more irrigation and re-using waste water. But current investment levels in overseas development aid and spending at country level are unlikely to be sufficient to ensure food security in the relatively short- term, let alone by 2050, when the global population is forecast to be nine billion. This article describes some of the issues that have to be faced to deliver food security and overcome water scarcity, and how these improvements can be achieved through a combination of science, policy and investment

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production demand resources population spending supply waste ...

GARDIAN - United States of America

Water resources and food security 全文

2014

Ringler, Claudia; Zhu, Tingju | http://orcid.org/0000-0002-8266-0488 Ringler, Claudia; http://orcid.org/0000-0002-6882-3551 Zhu, Tingju

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Water resources and food security 全文

2014

Ringler, Claudia; Zhu, Tingju | http://orcid.org/0000-0002-8266-0488 Ringler, Claudia; http://orcid.org/0000-0002-6882-3551 Zhu, Tingju

PR | IFPRI3; ISI; CRP5 | EPTD | CGIAR Research Program on Water, Land and Ecosystems (WLE)

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water resources food security

International Food Policy Research Institute - United States of America

Water resources and food security 全文

2015

Ringler, Claudia | Zhu, Tingju

Agricultural water use includes a continuum from purely rainfed to fully irrigated systems. Growing pressures on limited water supplies from domestic, industrial, and environmental uses will likely lead to a decline in water availability for food production. Similarly, income growth and urbanization lead to dietary shifts that require more water resources per calorie consumed, putting further pressures on water supplies. As a result, semiarid and arid countries continue to increase net imports of food. Crop water use for sugarcane (Saccharum officinarum L.), maize (Zea mays L.), soybean [Glycine max (L.) Merr.], and fruits are expected to grow over time, whereas water use for wheat (Triticum aestivum L.) and rice (Oryza sativa L.) are expected to decline after 2030. These projections include substantial improvements in water use efficiency at the field, farm, and river basin scale over the coming decades in response to growing water scarcity. If these efficiency improvements are not achieved, future crop water demands would be even larger. Although water resources are a key limiting factor for future food security, policy and investment options to reduce agricultural water use exist on both the water supply and demand side; but political will and ingenuity are needed for their implementation.

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water resources food security

International Livestock Research Institute - Kenya

Water resources and food program 全文

2014

Demin, A. P.

Data on the volumes of renewable water resources and the specific dependable water supply are given for countries with the least water resources available. Data on the current volumes of water resources withdrawal, irrigated land area, and the population size in largest world countries are given. Measures taken by various countries with the aim to enhance water resources availability for agriculture are described. The further increase in the area of arable and irrigated lands, with the current technologies still in use in the agriculture, is shown to be inadmissible. The role of reclamation in the ensuring of food safety in Russia is demonstrated.

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food safety water supply irrigated farming food and nutrition programs population size

National Agricultural Library - United States of America