Analysis on the situation and countermeasures of water resources supply and demand in the cities of small and medium-sized river basins along southeast coast of China — taking Xiamen City as an example

• Published in: Journal of Groundwater Science and Engineering 2021-12, Vol.9 (4), p.350-358
• Main Authors: Chun-lei Liu, Jian-hua Zheng, Zheng-hong Li, Ya-song Li, Qi-chen Hao, Jian-feng Li
• Format: Article
• Language: English
• Subjects: probability; supply and demand forecast; triple equilibrium; water resources; xiamen city
• ISSN: 2305-7068
• DOI: 10.19637/j.cnki.2305-7068.2021.04.008

The small and medium-sized river basins along southeast coast of China hold comparatively abundant water resources. However, the rapid resources urbanization in recent years has produced a series of water problems such as deterioration of river water quality, water shortage and exacerbated floods, which have constrained urban economic development. By applying the principle of triple supply-demand equilibrium, this paper focuses on the estimation of levels of water supply and demand in 2030 at different guarantee probabilities, with a case study of Xiamen city. The results show that water shortage and inefficient utilization are main problems in the city, as the future water supply looks daunting, and a water shortage may hit nearly 2 × 108 m3 in an extraordinarily dry year. Based on current water supply-demand gap and its trend, this paper proposes countermeasures and suggestions for developing and utilizing groundwater resources and improving the utilization rate of water resources, which can supply as a reference for other southeast middle-to-small-sized basin cities in terms of sustainable water resources and water environment protection.