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针对山东省莱州湾日益严重的海水入侵问题,利用变密度流地下水模拟软件SEAWAT建立一个非均质二维变密度地下水数值模型。通过对模型进行校正和检验,利用识别后的二维变密度地下水数值模型对莱州湾南岸地区今后几年的海水入侵程度进行预测。模型模拟结果表明,研究剖面的3 g/L矿化度线以约400 m/a速率向陆推移,浅层淡水咸化速度加快,严重影响了农业和生活用水量。预测结果可为莱州湾地区防治海水入侵提供技术。
In view of the increasingly serious seawater intrusion in Laizhou Bay, Shandong Province, an inhomogeneous two-dimensional numerical model of variable density groundwater was established by using variable density flow groundwater simulation software SEAWAT. Through the calibration and verification of the model, the degree of seawater intrusion in the south bank of Laizhou Bay in the next few years is predicted by using the identified two-dimensional variable density groundwater numerical model. The results of model simulation show that the 3 g / L salinity line of the study section slides toward the land at a rate of about 400 m / a, and the shallow freshwater salinization speed is accelerated, which seriously affects the agricultural and domestic water consumption. The forecast results will provide technology for the prevention and control of seawater in Laizhou Bay area.