Environmental Geochemistry of Swan Lake Inlet, Rongcheng Bay, the Yellow Sea of China

The Swan Lake Inlet, the State Primary Wildlife Protection Area, is a lagoon\|inlet system located in the Rongcheng Bay, Shandong Peninsula, China. It has been undergoing development for aquaculture and tourism. In the summer of 1999, a study on the environment of the Swan Lake Inlet was carried out. The concentrations of the major elements and trace elements Fe, Al, Pb, Zn, Cd, Cu, Cr, Mn and P have been measured by ICP\|AES and graphite furnace atomic adsorption spectrometry. The sources and distribution of the elements in the Swan Lake Inlet have been discussed. It is concluded that the Swan Lake Inlet has not been subjected to significant environmental pollution.\; The chemical results show that the dissolved oxygen (DO) contents are generally normal. At some locations DO solubility appears to be >100%. The BOD\-5 (five\|day biochemical oxygen demand) values are generally <4 mg/L and COD (chemical oxygen demand) 3～4 mg/L. The seawater N, P and Si contents are lower than the Class I water type specified by the Chinese National Standard of Water Quality. The low nutrient distribution reflects little discharge from land, therefore lacking of nutrient supply.

山东半岛月湖的潮汐水位特征

1998年11～12月和1999年8～9月在月湖用AanderaaWLR7/8型自记式潮位仪各取得29d的潮位资料 ,对潮位数据进行了调和分析 ,并进行了对比。结果表明 ,月湖潮汐类型属于以半日潮为主的混合潮 ,浅水分潮较为显著 ;冬季平均水位比夏季低0.34m ,冬季水位的非潮汐组分比夏季发育 ,冬季主要分潮相位比夏季延迟 。

山东荣成湾月湖口门落潮干道的推移质输运

改进了Gao等 ( 1 994)方法 ,并用以计算潮汐汊道口门落潮干道的垂线平均流速。利用月湖潮汐汊道系统冬、夏季各一个月的潮位资料 ,计算落潮干道的潮流流速和推移质输运率。结果表明 ,流速的计算值和实测值呈良好的相关性 。

改进BCR提取法对山东荣成天鹅湖金属环境赋存研究

采用改进的BCR提取法,分析2009年11月采集的山东荣成天鹅湖表层沉积物中Cu、Pb、Zn、Cr的环境赋存(酸可溶态、可还原态、可氧化态及残渣态);以污染系数法(CF)和次生相原生相分布比值法(RSP)对金属外源输入影响以及潜在的生物危害进行了分析。结果表明:Cu以可还原态和残渣态为主,各站位的潜在生物危害有差异;Pb的醋酸可提取态与可还原态达60.8%,生物可利用性强,具有较高的潜在生态危害;Zn和Cr主要以稳定的残渣态(分别为64.3%和57.1%)形式存在,同时受外源输入的影响也较轻微(CF<1),因而不具有环境危害。