Abstract
The estuary is a junction of river and sea and is also where freshwater and saltwater meet together. Salinity intrusion may happen when the runoff is relatively weaker or the tidal dynamic is relatively stronger. The Yangtze Estuary is the largest estuary in China. There are some water sources in the estuary to store and provide freshwater. The Dongfengxisha Reservoir is one of these water sources and is constructed in 2014 to provide drinking water for the islanders in the Chongming Island. The water source safety of major islands is most often suffer from the high salinity content of water. For The Dongfengxisha Reservoir, saltwater spilling over from the North Branch is a major threat under natural conditions. To research into how salinity intrusion influence on the water source safety, A two-dimensional tidal-salinity numerical model of the Yangtze Estuary is established to study the relationship between the salinity and the runoff process of the water intake in Dongfengxisha Reservoir. Salinity intrusion in the Yangtze Estuary is the most severe in January and because of its short duration, the water sources safety can be guaranteed. The northeast and northerly wind would increase the salinity of the water intake and northeast wind has a greater influence. The northwest wind would reduce the salinity of the water intake. The sustained north wind would aggravate the intrusion below the South Branch, but it would not affect the water source area. This research can provide reference for the construction of water sources in other islands.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Dai, R., & Zhu, J. R. (2015). Statistical analysis of the wind at the Chongming Eastern Beach. Journal of East China Normal University (Natural Science), 4, 17–25.
Ding, L., Dou, X. P., & Gao, X. Y. (2016). Analysis of saltwater intrusion into Yangtze estuary during dry seasons of 2013 and 2014. Hydro-Science and Engineering, 4, 47–53.
Luo, X. F., & Chen, Z. C. (2005). Numerical simulation study of effect of runoff and tide on the Changjiang River mouth saltwater intrusion. Coastal Engineering, 3, 1–6.
Wang, D. D., & Jia, W. X. (2018). Retrieving coastal soil saline based on landsat image in Chongming Dongtan. Journal of Agricultural Science and Technology, 20, 55–63.
Yao, Y. M., & Zhu, Y. L. (2017). The fresh and salt water mixing analysis of Yangtze River estuary based on lamination factor and mixing ratio method. Port & Waterway Engineering, 4, 60–65.
Acknowledgements
This work is supported by the National Key R&D Program of China (2017YFC0405400), The Follow-up Subject VI of the Three Gorges Dam by the Ministry of Water Resources (12610100000018J129-06).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Ding, L., Hu, J. (2020). Influence of the Salinity Intrusion on Island Water Source Safety: A Case Study of the Chongming Island, China. In: Nguyen, K., Guillou, S., Gourbesville, P., Thiébot, J. (eds) Estuaries and Coastal Zones in Times of Global Change. Springer Water. Springer, Singapore. https://doi.org/10.1007/978-981-15-2081-5_4
Download citation
DOI: https://doi.org/10.1007/978-981-15-2081-5_4
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-15-2080-8
Online ISBN: 978-981-15-2081-5
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)