Abstract
In view of the increased vulnerability of water resources system caused by seawater intrusion in the coastal areas of the Yellow Sea and Bohai Sea, this paper based on the VSD(Vulnerability Scoping Diagram) model to construct the water resource vulnerability evaluation index system of “exposure-sensitivity-adaptive capacity” under seawater intrusion. Then use entropy-TOPSIS method to evaluate water resource vulnerability and divide the levels. In addition, take Longkou City of Shandong Province as an example to conduct empirical research. The results show that the water resource vulnerability of Longkou City is at a strong vulnerability level. The water resources system is under obvious pressure. Population density, per capita GDP, temperature and precipitation change are the main factors of the system pressure. Seawater intrusion has a high degree of impact on water resources vulnerability and water resource system is more sensitive to groundwater level, chloride concentration and other stimuli. The improvement of water use efficiency and scientific and technological investment contribute to the significant enhancement of the adaptability of the water resources system of Longkou City.
Highlights
The coastal areas of the Yellow Sea and the Bohai Sea have an advantageous geographical location, rapid economic development, dense population, which leads to an increasing demand for water resources
Assessing the vulnerability of the water resources system in the Yellow and Bohai Sea coastal areas under seawater intrusion and seeking a proactive water resource management model are of great practical significance for
Based on the basic theories of water resources vulnerability and the conditions of the Yellow and Bohai Sea coastal areas, this paper focuses on the problem of seawater intrusion, empirically analyses the water resources vulnerability of Longkou City
Summary
The coastal areas of the Yellow Sea and the Bohai Sea have an advantageous geographical location, rapid economic development, dense population, which leads to an increasing demand for water resources. Assessing the vulnerability of the water resources system in the Yellow and Bohai Sea coastal areas under seawater intrusion and seeking a proactive water resource management model are of great practical significance for. Based on the basic theories of water resources vulnerability and the conditions of the Yellow and Bohai Sea coastal areas, this paper focuses on the problem of seawater intrusion, empirically analyses the water resources vulnerability of Longkou City. The entropy-TOPSIS method was used to evaluate the vulnerability, which provided decision support for water resource management in the coastal areas of the Yellow Sea and Bohai Sea. Based on the framework of VSD [1], water resource vulnerability is understood as a function of exposure, sensitivity and adaptive capacity.
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