Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

Development Trend Analysis of Seawater Intrusion and Groundwater Control Research in Eastern Coastof Laizhou Bay
Yuxin Liu1, Jingli Zhao2*, Yue Deng2*, Xiaofeng Duan2, Weiling Song2, Yue Guo2
1National Ocean Technology Center, Tianjin, China
2National Marine Data and Information Service, Tianjin, China*Corresponding author

In order to control seawater intrusion, the most effective measure is toreduce the exploitation of underground fresh water and balance theinterface of seawater and fresh water.

ABSTRACT
Based on the monitoring data of two seawater intrusion sections from2010 to 2018, the development trend of seawater intrusion in eastern
coast of Laizhou Bay was analyzed. The results showed thatgroundwater chlorinity had an obvious negative correlation withprecipitation and an obvious positive correlation with groundwater
exploitation. The artificial neural network (ANN) was used to establish
the relationship between precipitation, groundwater exploitation,groundwater chlorinity and groundwater level. The control standard ofgroundwater in eastern coast of Laizhou Bay was obtained. The
research results provide a theoretical basis for seawater intrusion
prevention and resource utilization of coastal area.

In this paper, based on the monitoring data of two seawater intrusion
sections in eastern coast of Laizhou Bay from 2010 to 2018, thedevelopment trend of seawater intrusion was analyzed. The artificial
neural network (ANN) was used to establish the relationship between
precipitation, groundwater exploitation, groundwater chlorinity andgroundwater level. The double control standard of groundwater(groundwater level and groundwater exploitation) with no seawater
intrusion was obtained. The research results provide a theoretical basis
for seawater intrusion prevention and resource utilization of coastalarea.

KEY WORDS: Seawater intrusion; development trend analysis;groundwater control; ANN; Laizhou Bay.

INTRODUCTION
Laizhou Bay is the most serious and typical area of seawater intrusion
in China. The seawater intrusion in Laizhou Bay began in the late1970s, due to the rapid development of economy and the impact ofhuman factors on the environment. (Wei,2010) The area of seawater
intrusion in Laizhou Bay has developed from 1692 km2 in 1980 to 4300
km2 in 2010. (Chen,2013) Seawater intrusion disasters pollute theunderground fresh water resources, resulting in the deterioration of theecological environment, which has a serious impact on coastal areas.
The development of seawater intrusion in Laizhou Bay area involves
many factors, such as hydrogeological environment, topographic andgeomorphic characteristics, climate and human activities. Whilehydrogeological environment and topographic and geomorphic
characteristics are the basic factors for the occurrence of seawater
intrusion. Human activity is the inducing factor.

Fig. 1 Evolution process of seawater intrusion in Laizhou Bay (Feng etal., 2006; Chen, 2013)

DEVELOPMENT TREND ANALYSIS

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