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Bian S Zhang Y Feng A Chiu L Wu S Hu Z 《Environmental monitoring and assessment》2008,138(1-3):281-287
This paper examines a small tidal system in Wanpingkou, Rizhao of China. The tidal system was originally maintained by a balance
of the natural interaction between tidal currents and waves. But this tidal system was diminishing by reclamation processes
since the 1980s, especially in 2003 when a sailing boat station was built in the study area. To investigate the stability
and development mechanism of the tidal system, its feasibility was evaluated before the sailing boat station was built. The
erosion and deposition in and out of the tidal system was analyzed, forecasted and compared with the data from field monitoring.
The results show that the tidal system would remain relatively stable, although its adjacent shoreline might change somewhat
after the newly built sailing boat station. This change would also affect the coastal water and wetland environment in the
study area. Further field monitoring in the area is still necessary. 相似文献
104.
Heavy metal contamination of road-deposited sediments in a medium size city of China 总被引:2,自引:0,他引:2
The aim of this paper is to determine and compare the environmental factors controlling vertical colonisation of periphyton on Sparganium erectum in a shallow eutrophic turbid lake, Manyas Lake, and an oligo-mesotrophic deep lake, Sapanca Lake, Turkey during the July 1997--November 1998. To investigate the effect of the environmental factors on periphyton colonization on S. erectum, the stem was cut above the rhizomes and subdivided into three equal sections. Multivariate statistical analyses have been applied to clarify relationships between environmental variables and periphyton colonization on S. erectum. Results indicated that physical disturbance and trophic level of the lakes influenced the colonization of the periphyton. Among the measured parameters, low light intensity, total suspended solids, temperature and water level fluctuation were observed as driving factors in Manyas Lake whereas nutrient deficiency was found as key factor in Sapanca Lake. The zonation of the periphyton, density, composition and dominant/subdominant taxa were significantly different in these lakes. However, Oedogonium sp., Mougeotia sp., Cylindrocapsa sp., Cladophora glomerata (Linn.), Aulacoseira italica (Ehr.) Simonsen, Melosira varians C. Agardh, Navicula tripunctata (O.F. Müller) Bory and Fragilaria ulna (Nitzsch) Lange-Bertalot were found as dominant species at all sections of S. erectum both in Manyas Lake and Sapanca Lake. It can be thought that these species have a broad range of tolerance to several physical, chemical and hydrologic disturbances. This is the first study to introduce how much the water quality and hydrologic drivers have affected vertical colonization of periphyton on S. erectum in two lakes with different mixing regimes. 相似文献
105.
影响省级环境监测中心站职工积极性因素的调查 总被引:1,自引:1,他引:0
调查结果表明,在二十项调查内容中,省环境监测站职工普遍对工作条件类指标(单位的领导水平、良好的工作环境、和睦的人际关系、领导重视和单位的前途)寄予很高的期望。对经济类指标(福利待遇和稳定的经济收入)反映强烈。此外,对能够体现知识分子能力和水平的职称晋级问题也有较高的要求 相似文献
106.
合成洗涤剂废水处理技术研究 总被引:12,自引:1,他引:12
探讨了生物接触氧化法处理含合成洗涤剂废水的技术,求得了最佳工艺条件。试验结果表明,生物接触氧化法能有效地处理含合成洗涤剂废水,在适当条件厂,CODcr去除率可达到80%~87%,CODcr容积负荷为35~5.gkg/m3·d。采用生物接触氧化-化学凝聚组合工艺,可使CODcr去除率提高到92%~96%。 相似文献
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108.
环境噪声污染对人体健康的影响 总被引:5,自引:0,他引:5
环境噪声污染污染对人体健康危害十分严重,除影响听力外,还可能引发神经,心血管,消化,内分泌及免疫系统疾病,且对视力,优生优育均有不同程度影响。加强环境噪声污染的防治,对于保障人民健康有重要意义。 相似文献
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110.
环境样品中多氯联苯残留物的色谱/质谱定量测定 总被引:2,自引:0,他引:2
多氯联苯(简称PCB)是全球性的环境污染物之一,实际上它是由一百多种氯化联苯异构体所组成的。为了测定复杂环境样品中的PCB总残留量,Webb等首先提出了“各峰和”定量法,我们亦在先前的工作中采用二种国产PCB标样建立了相应的填充柱色谱定量方法,即分别定量测定样品中各氯化联苯色谱峰所含的PCB量,叠加后得到PCB总残留量。但是有机氯农药的广泛污染经常使PCB的测定受到干扰。我们研究了PCB及几种国内常用有机氯农药的质谱图,找出了一些能相互抗干扰的特征离子,将这些质量色谱图叠加所得的选择离子流可用于定量分析,使我们有可能同时测定几种化合物(见图1),省略了繁杂的化学分离和提纯步骤,缩短了分析时间,避免了处置过程中痕量样品的损失或沾污,增加了测定的可靠性。 相似文献