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1992年8月航次调查结果表明，九龙江口水体中磷的迁移呈保守行为，TP和PP含量随着海水盐度的降低呈增加趋势，DP含量刚好相反；S＜15的低盐区，盐度对磷迁移的影响比较显著。沉积物TP含量与间隙水盐度呈正相关。磷在溶解态／颗粒态之间的分配随着海水盐度提高而增大，但在沉积物／海水和沉积物／间隙水之间的分配则比较稳定。前者多在2ｘ104cm3／g左右，后者基本处在（1～2）X104cm3／g之间。间隙水磷含量明显高于海水，平均富集系数在1．7左右。
The results of voyage survey in August 1992 showed that phosphorus migration in Jiulongjiang estuary was conservative. The content of TP and PP increased with the decrease of salinity of seawater, while the content of DP was the opposite. In the low salt area of S <15, the salinity The impact of phosphorus migration is more significant. Sediment TP content and interstitial water salinity was positively correlated. Phosphorus distribution in dissolved / particulate state increases with salinity increasing, but the distribution between sediment / seawater and sediment / interstitial water is relatively stable. The former mostly in the 2x104cm3 / g or so, the latter basically in (1 ~ 2) X104cm3 / g between. P gap water phosphorus content was significantly higher than sea water, the average enrichment coefficient of about 1.7.