When the world gets closer.

We help you see farther.

Sign up to our expressly international daily newsletter.


Ancient Chinese Canals Can’t Stop Desertification

In northwestern China, traditional water supplies can’t quench the massive thirst for development. Government desertification cures don’t include saving an ancient canal system that had sustained locals for centuries.

In Turpan, where temperatures climb to 50ºC (122ºF), the desert spreads
In Turpan, where temperatures climb to 50ºC (122ºF), the desert spreads
Harold Thibault

TURPAN -Kalik is seated next to his father in the small courtyard of an old, traditional Uyghur house made of ochre-colored bricks. "We are able to produce 500 kilos of grapes per day," he boasts.

Such production levels are something of a miracle, considering the climatic conditions that have hit Turpan, an oasis located in the middle of the desert in the northwest Xinjian region. The soil is dry and often sandy, and it receives no more than 20 millimeters of rain per year.

The young man is aware that this production is necessary for the survival of his family, whose property is situated just a few steps from the canal that was dug up four centuries ago. It is one of the arteries of the karez, an irrigation system dating back more than two millennia, and which served as a lifeline for this oasis, a former stopover for the caravans on the ancient Silk Road.

These irrigation canals, also known as "qanats," can be found in many arid regions of Central Asia. "The water is sweet, it comes down directly from Tian Shan," Kalik explains, referring to "The Celestial Mountain range," that spans across this Chinese region.

The network of underground canals transports water from the high mountains to this lower region, thus preventing it from evaporating along the way, as summer temperatures in these parts can reach 50ºC (122ºF).

Despite the springtime flowering of cherry trees, locals say the ancient system is facing a severe test from modern development. A few streets away, migrant workers are busy constructing concrete buildings that are slowly nibbling away at the old, traditional neighborhoods. The irrigation system can barely keep up with the pace of growth. Turpan is not escaping the process of massive urbanization or the overexploitation of natural resources. Though it is relatively small for a Chinese city, the population of this prefecture exceeds 600,000 now, up from 67,300 in 1949.

Drawing from groundwater

The inhabitants have been able to cultivate a type of grape, famous throughout the country, right in the middle of the desert thanks to 5,000 kilometers of canals. But exploitation and poor maintenance are beginning to run them dry. Only 300 of the 1,237 karez listed in 1957 are still functioning, and the ecosystem that was created around them is beginning to deteriorate.

At the same time, farm production, the principal economic activity in Turpan, has taken off. The surface area that now needs to be irrigated has increased from 60,000 hectares (232 sq. miles, 148,260 acres) in 1970 to 113,000 hectares (437 sq. miles, 279,230 acres) in 2008. Since the karez no longer supply enough water to satisfy the needs of both farm production and modern living, the municipality has begun to draw directly from the modest sources of groundwater.

As a direct consequence of this activity, the World Bank believes their elevation is decreasing 1.5 to 2 meters (5 to 6.5 feet) per year. "With the rapid economic growth of the last years, the consumption of water is increasing and surpassing the available quantities, leading to a severe overexploitation of groundwater sources," the institution said in 2010.

"These last five years, water has been less abundant, which is particularly noticeable in July and August," says Liu Daohong, an agricultural worker who arrived 10 years ago from the central province of Henan. He works in a field directly irrigated by groundwater.

Just like him, many are Han migrants, the ethnic majority in China, who have come to settle in Turpan in search of work in the agricultural sector of this region dominated by ethnic Uyghur. Several kilometers south of the city, the assessment is similar in the "botanical garden," where in fact a laboratory is researching the capacity of plants to withstand the extreme arid zone and to serve as a natural barrier against the expansion of the desert. A professor of the Chinese Academy of Sciences who specializes in the fight against desertification and who does not want to be identified by name says that "Ten years ago, we could find water at 18 meters (60 feet) below ground. But now, you have to dig between 25 and 30 meters (82 and 98 feet). We prefer to use the water at a depth of 156 meters (512 feet), because it's less salty."

Aware of the threat looming large over Turpan, China has invested $204 million in improvement projects. Three reservoirs will be constructed in the nearby mountains in order to provide a water supply throughout the whole year, costing 142 million dollars.

On paper, these projects highlight the historic role of the karez. However the local authorities remain unsure about the future life of the canals. Of the total apportioned money, only $500,000 will be dedicated to the rehabilitation of a single karez, a purely experimental project.

Read the original article in French

photo - Mark Lehmkuhler

You've reached your limit of free articles.

To read the full story, start your free trial today.

Get unlimited access. Cancel anytime.

Exclusive coverage from the world's top sources, in English for the first time.

Insights from the widest range of perspectives, languages and countries.


Globalization Takes A New Turn, Away From China

China is still a manufacturing juggernaut and a growing power, but companies are looking for alternatives as Chinese labor costs continue to rise — as do geopolitical tensions with Beijing.

Photo of a woman working at a motorbike factory in China's Yunnan Province.

A woman works at a motorbike factory in China's Yunnan Province.

Pierre Haski


PARIS — What were the representatives of dozens of large American companies doing in Vietnam these past few days?

A few days earlier, a delegation of foreign company chiefs currently based in China were being welcomed by business and government leaders in Mexico.

Then there was Foxconn, Apple's Taiwanese subcontractor, which signed an investment deal in the Indian state of Telangana, enabling the creation of 100,000 jobs. You read that right: 100,000 jobs.

What these three examples have in common is the frantic search for production sites — other than China!

For the past quarter century, China has borne the crown of the "world's factory," manufacturing the parts and products that the rest of the planet needs. Billionaire Jack Ma's Alibaba.com platform is based on this principle: if you are a manufacturer and you are looking for cheap ball bearings, or if you are looking for the cheapest way to produce socks or computers, Alibaba will provide you with a solution among the jungle of factories in Shenzhen or Dongguan, in southern China.

All of this is still not over, but the ebb is well underway.

Keep reading...Show less

You've reached your limit of free articles.

To read the full story, start your free trial today.

Get unlimited access. Cancel anytime.

Exclusive coverage from the world's top sources, in English for the first time.

Insights from the widest range of perspectives, languages and countries.

The latest