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Distribution Characteristics of Nutrients and Eutrophication Assessment in the offshore area of Northern Shandong

Journal of Landscape Research 2021年第2期13卷 69-73页

作者： LI Bin WANG Zhigang YI Qiuwei Shandong Provincial Yantai Eco-environment Monitoring Center YantaiShandong 264000China

According to the survey data of three voyages in the offshore area of northern Shandong in May,August and October 2018,the distribution characteristics and water qualities of DIN,PO_(4-)P and COD in different seasons were analyzed,and the eutrophication status of the sea area was assessed by single factor index,eutrophication index and organic pollution comprehensive *** results showed that the seawater in the surveyed area mainly belonged to class I and class II seawater,and DIN was the maximum factor influencing seawater *** planar distribution of DIN concentrations showed a decreasing trend from west to east,and high value areas appeared near the Yellow River Estuary and Xiaoqing River *** concentrations of PO_(4-)P were lower,and the planar distribution law was not *** concentrations of COD were high near shore and low offshore,high in the western sea area and low in the eastern sea *** eutrophication status of the sea area was not up to the eutrophication level,and red tides were less likely to occur,but there was a possibility of organic pollution.

关键词： offshore area Nutrient Eutrophication Organic pollution

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The Statistical Relation of Shear Velocity with Soil Properties

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China Ocean Engineering 1998年第1期13卷 121-126页

作者： Gao, YL Yan, SW Wang, JY China Acad Bldg Res Fdn Inst Beijing 100013 Peoples R China Tianjin Univ Hydraul Dept Tianjin 300072 Peoples R China China offshore Oil Engn Corp Tianjin 300452 Peoples R China

Shear velocity is an important index for evaluating soil dynamic properties of the site. In this paper, the statistical relation of shear velocity with soil properties is set up by statistical analysis of shear velocities and relevant soil properties measured in Tianjin and Shanghai. The obtained formula has some referential value for the evaluation and classification of the site in offshore areas of China.

关键词： shear velocity regression analysis offshore area statistical relation

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