Original Paper
FAN Zhongya,LIN Shu,ZENG Fantang,WANG Zhongyang,XIAO Jie’er
2013, 33(4): 400-406.
Large scale hydrological observations in the eight estuaries of the Pearl River were simultaneously carried out in February, 2011. Analysis of the field data showed that: (1) the eight estuaries in descendant order of runoff were: Modaomen, Humen, Hongqimen, Jiaomen, Yamen, Hutiaomen, Jitimen and Hengmen; (2) during tide waves going into the estuaries, Modaomen and Jitimen reached their top water level first, Humen and Jiaomen the last, and their time difference about 1 to 2 hours; the runoff was strong and tide was weak in Modaomen; the flood velocity in Modaomen was smaller than those in other estuaries, but ebb velocity the contrary; (3) the eight estuaries in descendant order of average salinity were: Humen, Yamen, Modaomen, Hutiaomen, Hengmen, Jiaomen, Hongqimen and Jitimen; (4) Humen, Yamen and Jitimen were of strong salinity mixing type; Modaomen belonged to strong salinity mixing type during spring tide, but high-degree stratification type during neap tide. other four estuaries belonged to moderate-degree mixing type, which were characterized by high salinity at bottom layer and low at surface layer, strong mixing during spring tide and weak mixing during neap tide.
