大亚湾大鹏澳周边河流中营养盐的分布及入海通量的估算  

Distribution and fluxes of nutrients from main riversinto sea of Dapeng'ao,Daya Bay

作　　者：孙丽华[1] 陈浩如[1] 彭云辉[1] 王肇鼎[1] 

机构地区：[1]中国科学院南海海洋研究所,广东广州510301

出　　处：《台湾海峡》2003年第2期211-217,共7页Journal of Oceanography In Taiwan Strait

摘　　要：分别于 2 0 0 1年 8月 (夏季 )和 2 0 0 2年 1月 (冬季 ) ,测定了大亚湾大鹏澳 3条主要入海河流南涌河、王母河和龙岐河水体中NO2 N、NO3 N、NH3 N、PO4 P、SiO3 Si的浓度水平 ,分析其分布特征和主要来源 ,并估算其入海通量 .结果表明 ,N、P营养盐浓度夏季高于冬季 ,Si的则相反 .无论夏、冬季 ,这 3条河流水体中的NO3 N均是无机氮的主要存在形态 .水体中N营养盐主要来源于农田氮肥的流失 ,其次是生活、工业区的排污 ;水体中P营养盐主要来源于生活区的排污 ,其次是农田磷肥的流失 ;人类活动对水体中Si营养盐浓度的影响最小 .夏季N、P、Si营养盐入海通量分别约为 6 7.36 3、3.6 45、1 1 .71 8g/s,冬季分别约为 0 .934、0 .51 5、2 3.2 85g/s .N、P入海通量夏季比冬季高得多 ,Si的则相反 .营养盐入海输送量中N∶P∶Si的原子比夏季约为1 3∶1∶4 ,冬季约为Investigations were conducted in Aug. 2001 (summer) and Jan. 2002 (winter) on the nutrients NO 2 N,NO 3 N,NH 3 N,PO 4 P,SiO 3 Si in three main rivers into Dapeng'ao: Nanyong River,Wangmu River and Longqi River. Their concentrations were determined, the distribution features and main resources were analyzed and the fluxes to the sea were calculated. The results showed that the concentrations of N and P in river water in summer were higher than those in winter, and it was contrary to Si. NO 3 N was the main form of dissolved inorganic N (DIN) in river water in summer and winter. N in river water mainly came from the N fertilizer loss of agriculture in summer, secondly from the drainage of human living area and industry. P in river water mainly came from the drainage of human living area, secondly from the P fertilizer loss of agriculture in summer. Si in river water was less controlled by human activities. The fluxes of N,P,Si into Dapeng'ao were 67.363, 3.645, 11.718g/s in summer, and 0.934, 0.515, 23.285 g/s in winter respectively. The fluxes of N and P in summer were higher than those in winter, and it was contrary to Si. The flux ratio of N∶P∶Si was 13∶1∶4 in summer and 4∶1∶50 in winter respectively.

关 键 词：大亚湾 入海河流 营养盐 海洋化学 分布 广东 氮 磷 

分 类 号：P734.44[天文地球—海洋化学]