China’s irrigation spews 30 mn tonnes CO2 every yearMarch 14th, 2012 - 4:27 pm ICT by IANS
London, March 14 (IANS) China’s groundwater irrigation system is responsible for spewing more than 30 million tonnes of carbon dixoide (CO2) per year into the atmosphere, says a research.
Groundwater used for crop irrigation in China has grown from 10 billion cubic metres in 1950 to more than 100 billion today, according to a study by the University of East Anglia (UEA).
Pollution is caused by the huge amount of energy needed to pump water from underground - in some areas from an average depth of 70 metres.
This research is the first to estimate that the pumping systems which support this immense irrigation network annually produce 33.1 MtCO2e (33.1 mega tonnes of CO2 equivalent), the journal Environmental Research Letters reported.
China is the world’s largest greenhouse gas emitter, with around 17 percent of it coming from agriculture. Irrigated agriculture in China produces 70 percent of the country’s grain. But it takes some 500 litres of water to grow the wheat for one small loaf of bread, according to an university statement.
The research team used extensive survey data collected from 366 villages in 11 provinces. They up-scaled these results to calculate the emissions created by groundwater pumping across China’s remaining 20 provinces.
Declan Conway, from UEA’s School of International Development and the Tyndall Centre, said: “Generally, there is a surprising gap in research knowledge about the energy required for water use. It is vital that we understand the sources of greenhouse gas emissions in agricultural water use to design and implement sustainable policies for the future.”
- Oil palm on peatlands trigger greenhouse gas: Study - Apr 27, 2012
- Eating wisely can lower carbon footprint: Study (Lead) - May 14, 2012
- Eating wisely can lower carbon footprint: Study - May 14, 2012
- Pumping groundwater may cause rise in sea level: Study - May 09, 2012
- Global CO2 emissions continue to soar - Jul 20, 2012
- Indian wins first Borlaug field research award - Aug 28, 2012
- Bengal nod to extract groundwater divides experts - May 25, 2012
- Vast groundwater reserves detected in Sahara - Apr 22, 2012
- India fifth major greenhouse gas emitter in the world - May 11, 2010
- New heating system for homes may cut greenhouse gas emissions - Sep 25, 2010
- Water supplies may run out by 2030 - Jan 11, 2012
- Slashing meat intake vital for curbing emissions - Apr 16, 2012
- Saline aquifers can store century's worth of CO2 emissions - Mar 22, 2012
- PM calls for regulating use of groundwater - Apr 10, 2012
- Groundwater depletion rate more than doubled in recent decades: Study - Sep 24, 2010
Tags: agricultural water, agriculture in china, carbon dixoide, crop irrigation, cubic metres, declan, east anglia, greenhouse gas emissions, irrigated agriculture, irrigation network, irrigation system, loaf of bread, london march, pumping systems, research knowledge, research letters, sustainable policies, tyndall centre, university of east anglia, water use