In the heart of China’s Guangdong Province, Guangzhou City has been making significant strides in water conservation, according to a recent study published in *Renmin Zhujiang*. The research, led by YANG Qunhao, employs an input-output method to quantify the industrial and agricultural water footprint, offering a scientific basis for sustainable water resource management.
The study reveals that Guangzhou’s industrial water-saving efforts have been notably effective over the past five years. From 2017 to 2022, the outflow ratio of industrial virtual water decreased from 18.87% to 12.32%. “This indicates a substantial improvement in water efficiency within the industrial sector,” YANG Qunhao notes. The water consumption per 10,000 yuan of industrial added value has also halved, dropping from 67 cubic meters in 2017 to 34.5 cubic meters in 2022.
The research delves into the structure of the industrial water footprint, highlighting that the food and tobacco industry, along with the equipment manufacturing industry, have the highest water footprints. The food and tobacco industry primarily relies on indirect water, with a significant 294.1379 million cubic meters of virtual water involved in its production processes. This underscores the importance of understanding and managing implicit water resources in these sectors.
For the agriculture sector, the findings present both challenges and opportunities. The study suggests vigorously promoting the development of agriculture and related industrial chains. “By doing so, we can optimize water resource allocation and enhance the overall water-saving effectiveness,” YANG Qunhao explains.
The equipment manufacturing industry, with its high direct and indirect water footprint, is encouraged to move towards less virtual water inflow and higher added value. This shift could not only conserve water but also boost economic gains, creating a win-win situation for both the environment and the industry.
The research underscores the importance of accurately quantifying the water footprint and determining the flow path of water resources. This knowledge is crucial for optimizing urban water-saving strategies and promoting water-saving awareness. As YANG Qunhao puts it, “Identifying hidden water use and addressing water crises are essential steps towards sustainable development.”
This study, led by YANG Qunhao and published in *Renmin Zhujiang*, provides valuable insights into the water footprint of industrial and agricultural sectors in Guangzhou City. The findings could shape future developments in water resource management, guiding policymakers and industries towards more sustainable and efficient water use practices.