Showing results for: Water use/consumption
This book (publication date 23 October 2020), takes an interdisciplinary look at groundwater management and sustainability. It covers some food-relevant topics, including the sustainability of groundwater used in agricultural production and trade and the political economy of groundwater irrigation in India.
This paper finds that over ten billion people could be fed within the constraints of four planetary boundaries (biosphere integrity, land-system change, freshwater use, and nitrogen flows), if the food system undergoes a “technological-cultural U-turn”.
This paper finds that replacing some rice cultivation in India with other cereals such as sorghum and millet could improve nutrient supply, decrease carbon emissions and water use, and increase the resilience of India’s food system to extreme weather events.
The US think tank Breakthrough Institute has created an interactive series of graphs to visualise how the environmental impact of farming in the United States has changed over time, covering land use, nitrogen loss, water, herbicides, soil erosion, greenhouse gas emissions and spending on research and development.
This book, originally published as a special issue of Water International, explores how the concept of “virtual water” is relevant to agriculture, trade and sustainability.
This paper assesses the agricultural water use efficiency of different food types based on their nutrient content, instead of the conventional approach of assessing water use in terms of litres used to produce a certain weight of food. The purpose of the study is to determine whether higher intakes of nutrient-rich foods such as fruit, vegetables and seeds might conflict with the aim of minimising agriculture’s water use.
Over half a million acres of irrigated farmland may have to be permanently taken out of agricultural use in the San Joaquin valley in California in order to conserve groundwater, according to this report by the non-profit Public Policy Institute of California. The report suggests using the land for generating solar energy, restoring ecosystems or managing flood risk by restoring floodplains.
Some avocado plantation owners in Chile are illegally diverting water from rivers and leaving local villagers without enough water, according to a feature in the Guardian. Demand for avocados has increased by 27% in the UK in the last year. Activist Veronica Vilches claimed that local people are getting sick because of the lack of water, while activist Rodrigo Mundaca says that the water provided to resident by trucks is of poor quality.
Researchers from Nasa have used satellite data to identify areas where freshwater reserves have increased or decreased. The study found that in 14 regions, the changes were likely due to human factors (e.g. groundwater pumping), and in 8 areas, the changes were caused mainly by climate (e.g. drought or ice-sheet melting). Freshwater availability decreased in several areas including northern India, north-east China, the Caspian and Aral Seas and some of the Middle East.
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.
The planetary boundaries concept provides a theoretical upper limit on human activity which the planet is able to sustain without major perturbation to the current ‘Earth system’. Previously, nine planetary boundaries (PBs) have been proposed and recently Steffen et al. (2015) have updated these boundary definitions and assessed the current state of the position of human activity with respect to each boundary. In this article, researchers from a number of food, climate change, agricultural and environmental research institutions around the world build on this work by assessing the impact of agriculture on each PB status, based on a detailed literature review of the available research.
This new book, edited by Laura M. Pereira, Caitlin A. McElroy, Alexandra Littaye and Alexandra M. Girard, presents a diversity of collaborations between various governance actors in the management of the Food-Energy-Water (FEW) nexus and analyses the ability of emergent governance structures to cope with the complexity of future challenges across FEW systems worldwide.