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Too little to waste

Boosting supply won’t solve Beijing’s chronic water shortage unless the government also tackles the careless habits of city dwellers, Yin Mingwan tells Jiang Hongtao.

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“We’ve been using it for over a decade, how can it just run out?” Mrs Wang lives in the Tianxin Jiayuan complex in the Beijing suburb of Huilongguan, where falling groundwater levels have caused the neighbourhood’s private well to cease functioning. For five months, 5,000 households have been relying on water delivered by tanker. But residents are opposed to the property managers’ plan to dig another well – they want to be hooked up to the municipal pipes, resulting in local deadlock.

As we talk, Wang buys a bottle of water and throws it away half-finished. “Don’t you want the rest?” I ask. She laughs. “It’s OK, there’s drinking water at work. It’s heavy and ruins the look of my bag. I just don’t believe the capital city will run out of water – just wait until the South-North Water Transfer Project is up and running. Then there’ll be nothing to worry about.”

Residents like Wang may be counting the days, or years, to completion of the government’s mega transfer project, a multibillion dollar infrastructure scheme that plans to draw water from rivers in the south of China and pump it to the dry north. But will it really solve the capital’s growing water problems and allow the residents to carry on carelessly wasting water? Everyone is calling for “sustainable development”, but what does that actually mean when it comes to curing Beijing’s chronic water shortages?

Yin Mingwan is senior engineer at the China Institute of Water Resources and Hydropower Research. In an interview, he explained to me that the transfer project is just a short-term solution: “Just because there’s demand doesn’t necessarily mean there’s supply to satisfy it, particularly when it comes to water. The transfer project will relieve Beijing’s water shortage for quite some time into the future, and there’ll be no risk of ‘drought’, but it’s not a permanent solution.

“If we don’t plan and manage water consumption, if we just allow a constant and unlimited increase in water demand, one day we’ll reach a point where water shortages are placing limits on urban expansion and social and economic development.”

Shrinking groundwater reserves are one of the most serious causes for concern: “Capturing and using large amounts of surface water, along with the pumping of a lot of groundwater, means groundwater reserves have depleted, as has their ability to be replenished – and that means groundwater levels drop,” said Yin.

He said that wells like the one Wang used to rely on use groundwater under the city to supply an apartment complex or a company – with consequences: “The well shaft acts like a funnel, with the water flowing to the lowest point. If you continue over-extraction, the water level keeps falling and ultimately that may cause subsidence.” Environmental pollution has also affected the quality of groundwater in places, Yin added.

Yin pointed out that Beijing has seen changes in efficiency of water use in recent years. Between 2000 and 2009, there was a clear shift in the structure of water usage: in the past, irrigation accounted for 40.8% of the city’s water usage but that has dropped to 33.8%, while industrial water usage has fallen from 26% to 14.6% and water consumption per 10,000 yuan of GDP dropped from 111 cubic metres to 19 cubic metres – 82.7% less.

However, domestic water consumption has gone in the opposite direction, rising from 33.1% to 41.4% of total consumption. “We’re already using 92% of available water resources, 93.87% if you include water transferred into Beijing,” said Yin. “You could say we’re almost using it all – there’s not much more potential to use locally.”

So what is the solution? According to Yin – tackling demand from the top: “If we don't build reductions into the water system and just rely on the conscience of the people, well, a lot of them will put their own comfort and convenience first and we won’t be able to stop water wastage.” Many of Beijing’s tall buildings were built before reclaimed water systems were standard, and adding them in now is costly, so companies are unlikely to do so of their own accord. “If there was a policy on this, things might improve,” he said.

Also, as Beijing is the political capital, and therefore home to many government departments, non-domestic water wastage is a serious problem – because users in these institutions know the government picks up the bill. Yin said: “Given the rate at which organisations of that kind use water, it is essential to fit water-saving equipment. There needs to be actual sanctions for bodies or individuals who waste water – it can’t just be the appearance of action.” Strict quotas for domestic use could be problematic, but stepped tariffs for domestic and business or governmental consumers may be possible, he added.

Beijing has put quotas on water use for businesses for several years now, with some results, but while it is a good first step, Yin does not believe it is enough: “If we are to avoid water becoming a bottleneck for urban development, the key is to change our industrial structure. In the long term, we need either to move or to close some major water users. The relocation of Shougang Steel is an excellent model.”

In the past, when it was based in the capital, Shougang, China’s leading steel producer, used 50 million cubic metres of water a year. Since relocation to Hebei, it is still using 40 million cubic metres – but the water is mostly reclaimed from a nearby waste-water treatment plant and a desalination plant, which can produce 30 million cubic metres of desalinated sea water annually. This means the relocation of Shougang saved Beijing and eastern Hebei 100 million cubic metres of water annually.

Figures from the State Council’s South-North Water Transfer Project Office show that, of the 155 individual work items involved in the first stage of the project’s east and central routes, 33 (or 21%) have been completed, while 67 (43%) are under construction. According to Yin, completion is due in 2014. Until then, Beijing’s water resources will be under increasing pressure and it is crucial to reduce usage in the short term, particularly as domestic use is both continuing to increase and become the main type of consumption.

“We also need to improve management of the upper reaches of waterways that flow into Beijing from elsewhere, to reduce pollution and conserve that resource,” said Yin. “Similarly, we need to improve protection of water that flows out of our borders, so that those living downstream can use it.” Only then, he said, will we move towards sustainable development.

 

Yin Mingwan is a senior engineer at the China Institute of Water Resources and Hydropower Research and researches the optimal allocation of water resources, the water economy, water pricing and water rights.

An earlier version of this article appeared in Science and Technology Daily. It is edited and published here with permission.

Homepage image by Bert van Dijk

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Default thumb avatar
zhanshi

浪费水——城市模式

嗯,承认浪费不是不存在的。

我曾经和两个外出务工人员同住在一个公寓,他们是朝鲜族,在一家韩国汽车制造厂当翻译。

他们观察极其整洁的韩国香皂,“挣扎”着每天冲十分钟的澡,而且还做足疗和洗面。
很疯狂对不对?

Wasting water - urban style.

Hm, agreed that waste is certainly not absent.

I used to live in a flat with two migrant workers who - being Korean Ethnic Minority - worked as translators for a Korean car manufacturer.

They watched squeaky clean Korean soaps, "Struggle" and took two 10 minute long showers a day, along with foot spas and long face washes.
Crazy, no?

Default thumb avatar
rosewangyuan

盒子思维

北京目前的用水情况像极了当年的洛杉矶。洛杉矶20世纪初的时候由于城市化,人口迅速增长,1908年开始修建引水渠(Los Angeles Aqueduct),从200多英里外的Owens Valley引水。当年的水电局(LADWP)局长William Muholland以为建了引水渠,洛杉矶的供水就永无后患了。然而事实是水渠建成二三十年后,洛杉矶就发现引水渠早已无法满足爆炸式的需求增长,于是他们又开始兴建第二条引水渠,将触角伸向更远的Mono Lake Basin。即便如此,需求还是未能满足,

到了20世纪70年代,过度开发水资源导致了Owens Valley 和Mono Lake的生态环境严重破坏,Owens Lake完全干涸,留下一片盐碱地。风吹起盐沙,引起当地居民的呼吸道疾病。所以洛杉矶水电局从那时起就一直纠缠在各种环境官司当中,并被要求对那些受影响地区进行环境补偿。到了现在,洛杉矶才开始真正跳出原来要发展就必须获得更多水资源的盒子思维,大力促进节水和循环水利用

Think outside the box

Beijing's present water situation seems the very image of the Los Angeles Water Wars in last century. As a result of urbanization and a growing population Los Angeles encountered difficulties and decided to deliver water from the Owens Valley, more than 200 miles away. The superintendent of the LADWP believed that if an aqueduct was constructed, the water supply problem would be solved forever. Nevertheless, twenty or thirty years later, they found that the aqueduct couldn't meet the explosive growth of water demand, and decided to build another. This time, they extended their search to a much more remote place - Mono Lake Basin. Yet demand could still not be fully met. Due to over-exploitation, the ecological situation in Owens Valley and Mono Lake degenerated in the 1970s: Owen Lake totally dried out, leaving a saline-alkali field. When wind blows, the saline dust makes the local people liable to respiratory diseases. The LADWP were confronted with various lawsuits and were required to give environmental compensation to affected areas. Los Angeles only recently began thinking outside of the box, they are finally encouraging citizens to save and recycle water.