MATLAB在井水位潮汐调和分析中的应用OA

This study systematically reviews three mainstream methods for tidal harmonic analysis of well water levels:the spectrum analysis method based on fast Fourier transform(FFT),the time domain least squares method,and the Bayesian statistical method(Baytap-G).The mathematical models and computational proce-dures of each method are elaborated.To address the issues of operational complexity and high entry barriers associated with existing specialized tools,unified and user-friendly MATLAB implementations are provided.Using the well water level observation data from Nanhua county bureau well in Yunnan province as an example,the calculation results of the three methods are compared and analyzed.The results indicate that the three methods yield generally consistent outcomes for the principal tidal constituent(M2),yet each has its own applicable scenarios:the spectrum analysis method is suitable for rapid screening,the time-domain least squares method offers a good balance between computational efficiency and parameter estimation stability,and the Bayesian method demonstrates advantages under complex noise conditions.