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海水入侵是我国沿海地区出现的一典型资源与环境问题.作者选用地质、气候、地理环境和人为因素等四类指标来反映海水入侵存在的风险,采用非线性映射分析将高维空间问题转化为低维空间问题.根据离差极小、最大欧氏距离等原理提出了海水入侵风险阈值求解方法与海水入侵风险判定方法,使存在海水入侵风险的区域可被及时、准确地判定出来.实例分析表明,该方法使分析结果真实、准确,为沿海地区海水入侵风险管理开辟了一条新途径.
Sea water intrusion is a typical resource and environmental problem appearing in the coastal areas of our country.The authors choose four kinds of indexes, such as geology, climate, geographical environment and human factors, to reflect the risk of seawater intrusion and use non-linear mapping analysis to convert high-dimensional space problem into Low-dimensional space problem.According to the principle of minimum deviation and maximum Euclidean distance, the method of solving the threshold of seawater intrusion risk and the method of determining the risk of seawater intrusion are put forward so that the area with the risk of seawater intrusion can be judged timely and accurately. It shows that this method makes the result of the analysis true and accurate and opens up a new way for the management of seawater intrusion in coastal areas.