Showing results for: Irrigation
This book reframes the debate around water and food security, focusing on the rights of marginalised people instead of only discussing irrigated agriculture.
This paper models the changes in vegetation and agricultural land use that might be expected if action is not taken to mitigate climate change. Temperatures in the UK would increase by around 5.4°C in the growing season and 4.7°C out of the growing season by the end of the century. The growing season would become drier by around 37% and the non-growing season would become 7% wetter, with drying being less pronounced in the north of the UK than the rest of the country.
Wastewater canals used to irrigate urban agriculture in Burkina Faso may harbour dangerous microbes such as tuberculosis and genes that give microbes resistance to antibiotics, according to this research paper. The canals sampled by the researchers were designed to protect against flooding, but are used to water agricultural fields. The canals, which are not regularly cleaned, receive sludge, solid waste, wastewater, and effluent from a hospital, a market, houses and a slaughterhouse.
A project in Ladakh, India, creates “ice stupas”, a form of artificial glacier, to complement intermittent water flow from retreating natural glaciers. Water from streams is sprayed from vertical pipes during the winter, freezing into pointed mounds, which melt slowly throughout the year, irrigating crops in the summer.
This paper examines the role that agricultural research and innovation has in changing the food systems of developing regions, including urbanisation, decline in the importance of cereals in the diet, rise in processed foods, and shift in types of grains produced. Ways in which research affects the food system include: new breeds and varieties that are suited to small farms and/or ease of processing; cheaper inputs such as irrigation, fertilisers, herbicides and tractors; and introduction of motorised transport and temperature controlled storage. The authors call for more investment in the post-farm stages of the food system, such as processing, logistics, and wholesale, because these stages add significant value to food products.
This article looks at our ability to increase cropping intensity in order to meet future food needs and avoid expanding cropped land area. The research produces spatially explicit information on the cropping intensity gap, i.e. the difference between actual and potential cropping intensity and finds that increasing cropping intensity could compensate for land lost to urbanisation.
This article examines global overuse of freshwater resources and how more sustainable irrigation practices could impact other environmental and developmental targets in the SDGs. It finds that the main likely effects are 1) increased food prices due to lower productivity and/or production costs as water prices increase, and 2) cropland expansion and associated extra GHG emissions of 0.87 gigatonnes of carbon.
The U.S. Geological Survey (USGS) has released a worldwide map that details croplands in high resolution in an ongoing effort to monitor croplands and water use.
This study models the water demand of land acquisitions in Africa as a function of crop choice, local climate, and irrigation scenarios. Its authors distinguish between green and blue water, equating to water from rainfall and that provided to crops by irrigation respectively.
In this paper by researchers from Germany, Kenya, Australia and Sweden, a modeling approach is taken to ascertain the efficacy of applying improved water management techniques on a large scale to increase yields to help meet global demand for food.
This study aims to assess the effect of five dietary scenarios – designed to promote healthier and more sustainable eating – on the blue water scarcity footprint of UK food consumption. The objectives are to estimate the total blue water consumed in producing food commodities consumed in the UK; the contribution, and geographical concentration, to global blue water scarcity; and the potential impact of alternative healthy eating scenarios on global blue water scarcity.
This paper published in PNAS - Proceedings of the National Academy of Sciences of the United States of America - looks at the environmental costs of food production and in particular livestock based food production. The paper is based on annual 2000–2010 data for land, irrigation water, and fertilizer from the USDA, the Department of the Interior, and the Department of Energy.
This study looks at the double challenge of increasing food security while addressing environmental problems caused by agriculture. It identifies a set of key actions in three broad areas that hold the greatest potential for achieving these efficiency and sustainability goals.