Low-carbon Sustainable Information System of Kaohsiung City

Drip Irrigation Systems / Irrigation in the Desert

 In the words of my generation, let’s get real.

There are now more than 7 billion people coating the surface of Planet Earth, and that number’s going to go up a lot more before it goes down. The rankings of what people consider to be life’s necessities will vary depending on whether they live in Greenwich or Ghana, but the one thing that’s at the top of everyone’s list is water.

Earth is 2/3 water, but only 10% of that is the fresh water we need for drinking, running machinery, growing rice and beans, and shaving and brewing beer and making blue jeans.

Analysts from the UN to the Council On Foreign Relations are painting a fairly grim picture of our ability to keep up with the demand for water in the years to come. The situation is dire – already more than a billion people in Africa and Asia don’t have access to clean drinking water – and the challenge is huge…but it’s not insurmountable.

I suppose that any steps individuals can take to cut down on our use of water would help – shorter showers, less car washing, fewer ice cubes in our mojitos. But when it comes to making a real dent in humans’ use of fresh water, if you’re not talking farming, you might as well not be talking.

Here’s how we humans divvy up the planet’s fresh water: Think of ten glasses of water lined up on a kitchen counter. They represent the world’s supply of fresh water. You drink one glass: that’s the portion people put to domestic use.

Then a factory owner comes in to the kitchen and grabs two glasses: that’s the slice industry uses to do its thing, to cool engines and make paper and fabric and so on. Then a farmer comes in, grabs the remaining seven glasses, takes them back to his farm and pours them on his crops.

That’s right. Seventy percent of the available fresh water on our planet goes to agriculture. And the vast majority of that water is used not only unproductively, but in ways that do more harm than good.

This is the challenge that the legendary Israeli firm Netafim has been confronting since the 1960s – that challenge of bringing agricultural irrigation in line with a drying planet.

(continue)

 

Source of the materials :http://untoldnews.org/drip-irrigation/