Hyperfine spectrum; Nonlinear optics; Degenerate four waves mixing; The equivalent grating; Isotope detecting.

超精细光谱；非线性光学；简并四波混频技术；等效光栅；同位素检测。

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This paper introduces the applications of "isotope tracting method" and "DB-3 I embankment piping and leakage detecting system" to Hongze Lake embankment, and compares the two methods.

介绍了“同位素示踪”法和“db—3 i型堤防管涌渗漏检测系统”在洪泽湖大堤渗漏检测中的应用情况，并对两种方法的应用进行了对比。

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