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莱州湾东、南沿岸平原的海（咸）水入侵是人为过量采取地下水和自然环境变化共同引发的灾害。根据多年观测数据绘制的地下水位负值区、淡水资源超采量和海（咸）水入侵面积等三标志划分灾害进程为初始阶段、发展阶段、恶化阶段和缓解阶段。给出了灾害发展模式。以此解释新区灾害，针对灾害发展的不同阶段，采取适时而有效的防灾减灾对策和措施。
Sea (salty) water intrusion on the eastern and southern coasts of the Laizhou Bay is a disaster triggered jointly by man-made overuse of groundwater and changes in the natural environment. According to the data of negative values of groundwater level, over-exploitation of freshwater resources and sea-saltwater intrusion, the disasters are divided into initial stage, development stage, worsening stage and mitigation stage. Given the disaster development model. In this way, we can explain the disasters in new districts and take appropriate and timely measures and measures for disaster prevention and mitigation in light of the different stages of disaster development.