The solar and lunar daily variations of the ionospheric total electron content observed at Lunping, which lies close to the crest zone of the so-called equatorial anomaly, were analyzed by Chapman-Miller method. The lunisolar diurnal variation L1 and lunar semidiurnal variation L2 were found to have significant seasonal variations, with amplitude increasing steadily from summer to winter. The hours for L1 and L2 variations to attain their respective maximum values also increase steadily from summer to winter. The seasonal variation of the semidiurnal variation l2 was found to be explainable by the additional fountain effect caused by the similar seasonal variation of the lunar semidiurnal electric field induced at the equatorial region. However, the seasonal variation of the lunisolar variation L1 was found not to be explainable by the additional fountain effect. Seasonal variations for the harmonic components of the solar daily variation were found and described.