九龙江口水体中1995年磷的转移

Transfer of phosphorus in Jiulongjiang Estuarine water, 1995 cruises

1995年3个航次的调查研究结果表明，九龙江口水体总磷含量受悬浮物含量控制，在S＜5的低盐度区，悬浮泥沙和磷产生明显的絮凝沉降，在S＞5时，它们的迁移接近于理想混合。溶解磷的河口转移与其在河流端的浓度密切相关。当河端浓度低时，磷略呈溶出现象；而河端浓度高时则接近于理想混合过程。估算得出九龙江河流总磷的平均入海通量为2．9×103t／a，其中溶解磷和颗粒磷各占一半左右。

Based on the investigation data of the three cruises in 1995,the transfer and input fluxes of phosphorus in the Jlulongjiang Estuary have been studied. The results indicate that the distribution and transfer of phosphorus are controlled by suspended materials (SPM). The flocculation and sedimentation of SPM and phosphorus accur when S<5,and they are trans-ferred conservatively when S>5. The transfer of dissolved phosphorus in the estuary is cor-related by its content in the river end. Some release of phosphorus is found when IP content is low,while transferred conservatively as IP content is high. It has been estimated from dif-ferent cruises that the input flut of the total phosphorus from the Jiulongjiang River rangesbetween (2. 42~3. 15) × 103t/a with a mean of 2. 86×103t/a,and the mean fluxes of dissolved and particulate phosphorus account for 1/2 of total input respectively- The mean fluxes from tbe JiulongJiang River during 1992 to 1995 are as following 2. 2×103t/a of TP11, 0×103t/a of DP and 1. 2×103t/a of PP respectively. The data of the cruises during 1992 to 1993 are in-cluded.