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[¿ø¹®º¸±â]


NEW METHODS FOR IMPROVING WATER MANAGEMENT TO DEVELOP SUSTAINABLE CITIES


 

Water, as one of the essential natural resources, is vital for the growth of any region. How much water a city has access to and how water is distributed is a crucial part of sustainable development.


Therefore, it is important to assess how well a city can manage its water resources to develop the economy in a more environmentally friendly way.


Suzhou, a city in eastern China, has abundant water resources and complex water systems. Almost half of the city¡¯s area is covered in water. It is also an important industrial development zone in the Yangtze River Delta region and has undergone rapid urbanisation. This makes it challenging for the authorities to manage water resources and the increasing demand for water while controlling sewage and pollution.


In a recent paper published in the journal of Water Resources Management, researchers from Xi¡¯an Jiaotong-Liverpool University, China, created a system to evaluate the water quality challenges in Suzhou and calculate an overall score of the city¡¯s water environmental carrying capacity. The score measures the maximum capacity of an area to maintain water quality standards while undergoing sustainable social development.


By considering various factors, including the condition of Suzhou¡¯s water sources, the impact of human activities, and the city¡¯s socioeconomic factors, the team found that the city¡¯s water capacity has increased since 2001.


The rise suggests that measures taken by the government, like industrial structure optimisation and wastewater recycling, have been effective. However, there are still certain aspects that could further improve the water environment.


The findings from this study can help city planners make informed decisions for future development of sustainable cities worldwide.


Managing urban water demands


Jiaxi Chen, first author of the paper and a masters graduate of XJTLU¡¯s Department of Civil Engineering who was supervised by Dr Xiaonan Tang, says: ¡°We analysed data from 2001 to 2021 and found that Suzhou¡¯s water capacity has increased over time, suggesting better water management and more effective water usage.


¡°During the two-decade period we studied, the industrial structure of Suzhou has been continuously optimised, and more and more attention is being paid to collecting and treating wastewater. This has contributed to a better water environment.¡±


However, Chen says, there are still factors straining the water capacity. ¡°Although the overall water capacity has increased, the total water resources available in Suzhou have fluctuated over the years but slightly decreased in general. Lack of usable water resources can lead to unbalanced water distribution and worse water quality.


¡°Also, with rapid urbanisation, more and more people live in urban areas. The increasing water consumption in the city has added pressure to Suzhou¡¯s drainage system,¡± she says.


Measures for improvement


The researchers have made several recommendations to further improve water and environmental management in cities.


Chen says: ¡°First of all, the ecosystem should always be protected as it will directly impact water resources.


¡°The government should regulate sewage discharge and prohibit the setting up of polluting enterprises near lakes and wetlands to prevent water pollution at the source. Better control and maintenance of important rivers and lakes can also improve the water environment.


¡°Efforts should be made to increase public awareness of water conservation. The general public needs to be encouraged to adopt more efficient water-use practices.


¡°On the macro level, cities should modify their industrial structure towards one that is compatible with the water capacity. By promoting cleaner production in industry and agriculture, water consumption and pollutant production can be reduced, and water recycling and reuse rates can be enhanced.¡±


The study¡¯s authors include Jiaxi Chen and Dr Xiaonan Tang, Senior Associate Professor at XJTLU¡¯s Department of Civil Engineering. The paper ¡°Towards sustainable cities: studying evaluation index of water environment carrying capacity¡± can be accessed online here.


[Ãâó = XJTLU(https://www.xjtlu.edu.cn/en/news/2023/12/new-methods-for-improving-water-management-to-develop-sustainable-cities) / 2023³â 12¿ù 1ÀÏ]

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