AGRICULTURAL WATER SCARCITY IS ABOUT TO GET MUCH WORSE

 AGRICULTURAL WATER SCARCITY IS ABOUT TO GET MUCH WORSE

earth.com

A new study published in the journal Earth’s Future has found that, due to climate change, agricultural water scarcity is set to increase in over 80 percent of the world’s croplands by 2050.

In order to examine current and future water requirements for global agriculture and to predict whether the water levels available will be sufficient in a world struggling with climate change.

The experts developed a new index to measure and predict water scarcity in agriculture’s two main sources: soil water that comes from precipitation (the so-called “green water”) and irrigation from lakes, rivers, or groundwater (“blue water”).

In the last 100 years, the demand for water worldwide has grown twice as fast as the human population. Water scarcity is already an issue on every continent with agriculture, presenting a major threat to food security. Despite this, most water scarcity models have failed to take a comprehensive look at both blue and green water.

“Longer term, improving irrigation infrastructure, for example in Africa, and irrigation efficiency would be effective ways to mitigate the effects of future climate change in the context of growing food demand,” Liu said.

Karabelo Moncho

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