担杆头潮位站假定基面与珠江基面关系初探

担杆头潮位站是珠江口重要的纯潮水位站，由于特殊的地理位置，该站未与珠江基面接测，一直使用假定基面，限制了潮位资料的使用。通过对平均海平面的计算，推算出担杆头站潮位资料换算到珠江基面的换算系数和原假定基面基本点的珠江基面高程，为该站潮位资料更广泛使用提供参考。

Probe into Conversion between Reference Datum in Dangantou Tide Station and Pearl River Datum

Dangantou Tide Station is an important tide station in the estuary of Pearl River. Due to the special geographic location, the station has not linked to the datum of Pearl River and used the reference datum. This has limited the popularity of the tidal data. In this paper the calculation of the average sea level facilitated the calculation of coefficients of the conversion of data of the Dangantou Tide Station to the data of the Pearl River datum and the elevation of basic points in the reference datum was conversed to the Pearl River datum. This has provided the popularity of the data from the Dangantou Tide Station with the scientific reference.