InSAR detection of residual settlement of an ocean reclamation engineering project: a case study of Hong Kong International Airport

Man-made land or islands that are reclaimed from the sea are suitable for building airports, harbors, and industry parks for material transportation because of their broad air and land spaces. However, the reclaimed foundation settlement process is of public concern, including the continuous impact of ocean processes on its stability. The majority of the buildings and facilities of Hong Kong International Airport (HKIA) are built on a reclaimed foundation. The reclaimed foundation has been in residual settlement since completion of the filling project in 1994. In this study, we use persistent scatterer interferometry (PSI) and ENVISAT (European Satellite) advanced synthetic aperture radar (ASAR) data to detect the residual settlement rates from 19 April 2006 to 9 January 2008. We use ground truth data to develop empirical correction models for correcting systematic biases in the ASAR PSI-detected settlement rates. The corrected data follow the Lorentz distribution well, implying that the residual settlement process is dominated by two modes or categories of settlement rates. The first category represents a relatively stable state and the second category represents a continuous settlement state. A ground settlement rate map of HKIA shows that an area of the Passenger Terminal Building and an area of the Southern Runway are two relatively stable areas. There are two major continuous settlement areas. One covers the airport Midfield. Another is along the coastline, implying that attention should be paid to impacts of ocean processes on the stability of airport foundations.     

Stability Design System of Submarine Pipelines

This paper introduces a stability design system of submarine pipelines. The system can provide a reasonable design procedure for users with reference to domestic and foreign methods and in the light of home engineering experience.     

基于特定序列的长牡蛎视黄酸反应元件预测

视黄酸受体和核受体超家族中的大部分成员对细胞整个分化、增殖过程都具有调控功能。视黄酸受体结合配体后激活,通过结合靶基因启动子区特定的核苷酸序列调控靶基因表达。视黄酸受体结合序列是由核心序列[A/G]G[T/G]TCA间隔不同碱基构成的重复序列,称为视黄酸反应元件。为了实现对长牡蛎基因组中含有的视黄酸反应元件的快速筛选预测,本研究利用Perl工具编写了一个可以批量筛选视黄酸反应元件的脚本,并对长牡蛎基因组中启动子区域序列进行筛选预测,共筛选到412个启动子区含有视黄酸反应元件的基因。随后,将这些基因在各种数据库中比对分析,预测其参与的生物学过程及可能的生物学功能。结果显示,大部分基因与蛋白质结合、核苷酸结合、水解酶活性、蛋白激酶活性等功能有关。     

Study of zooplankton ecology in Zhejiang coastal upwelling system-Zooplankton biomass and abundance of major groups

The studied area is a shallow water area that belongs to the East China Sea continent shelf. The distribution of zooplankton biomass is higher inshore than offshore. The maximum abundance is in the inshore edge of the centre of upwelling, which is the superposed area of the salinity front and temperature front, due to the fact that the mixture of three different waters has brought about a concentration of nutrients. The herbivorous Euphausia, Copepoda and Tunicata are the major groups of the abundant area. Tunicata possess the possibility to compete against other kinds of herbivorous zooplankton. This means that there is negative correlation between the distribution of Tunicata and that of Copepoda and Euphausia. The positions of maximum areas of zooplankton biomass, phytoplankton individual and the concentration of phosphates and chlorophyll-a overlap one another. In the centre of upwelling, zooplankton can not adapt itself to the environment of lower temperature and less oxygen even with rich nutrient     

印度洋东部金枪鱼延绳钓渔业研究--大眼金枪鱼(Thunnus obesus)的生物学特征

根据作者在印度洋东部海域的延绳钓生产实践,对渔获的大眼金枪鱼群体的群体构成、摄食、繁殖等基本生物学特征进行了初步探讨.结果表明,渔获群体由纯重10～115kg、叉长80～195cm个体组成,纯重与叉长关系式w=2.000×10-5×L2.969;渔获物以3～5龄个体为主,雄性个体所占比例明显高于雌性个体,且随年龄增长雄性个体所占比例逐步提高.鱼群在该海域产卵期较长,不同年龄组性腺发育节律有明显差异.     

Study on scattering wave force of horizontal and vertical plate type breakwaters

The interaction between wave and horizontal and vertical plates is investigated by the boundary element method,and the relations of wave exciting force with plate thickness,submergence and length are obtained.It is found that:1) The efficient wave exciting force exists while plate submergence is less than 0.5 m,and the plate is very thin with order O(0.005 m).2) The maximum heave wave exciting force exists,and it is the main factor for surface and submerged horizontal plate while the roll force can be ignored.3) The maximum sway wave exciting force exists,it is the main factor for surface or submerged vertical plate,and the roll force is about 20 times of horizontal plate.     

不同生长期坛紫菜多糖中组分含量的变化

于１９９０－１９９１年，运用＾１３Ｃ－ＮＭＲ和化学分析方法研究南方产和移植北方养殖的不同生长发育阶段坛紫菜多糖的组分变化，结果表明，随着藻体生长发育，坛紫菜琼胶中３，６－内醚－Ｌ－半乳糖和６－ＯＣＨ３－Ｄ－半乳糖的含量逐渐增加，而硫酸基的含量呈现先增加后减少的规律；北移坛紫菜琼胶中３，６－内醚－Ｌ－半乳糖的含量高于南方坛紫菜，而硫酸基和６－ＯＣＨ３－Ｄ－半乳糖的含量低于南方坛紫菜。     

南海北部底层沉积物捕获器中海雪和生物粪粒组成及来源探究

Sediment traps are an important tool for studying the source, composition and sedimentation processes of sinking particulate matter in the ocean. An in situ observational mooring(TJ-A-1) is located in the northern South China Sea(20.05°N, 117.42°E) at a water depth of 2 100 m and equipped with two sediment traps deployed at 500 m and 1 950 m. Samples were collected at 18-day intervals, and 20 samples were obtained at both depths from May 2014 to May 2015. Large amounts of fecal matter and marine snow were collected in the lower trap. The fluxes of marine snow and fecal pellets exhibited a fluctuating decrease between May 2014 and early August 2014 and then stabilized at a relatively low level. Scanning electron microscopy observations revealed that the main components of the marine snow and fecal pellets were diatoms, coccolithophores, radiolarians, and other debris, all of which are planktons mostly produced in photic zone. Used in conjunction with the particle collection range estimates from the lower trap and data on ocean surface chlorophyll, these marine snow and fecal pellets were related to the lateral transport of deep water and not vertical migrations from overlying water column. Moreover, the source area might be southwest of Taiwan.     

2012—2016年象山近岸海域水质评价与模拟研究

为了解象山近岸海域水质污染状况,文章根据2012—2016年象山县近岸海域的水质监测结果,分析象山近岸海域水质现状及年际变化。应用灰色预测的模型来对象山近岸海域水质主要污染物的相关数据进行处理,得出主要污染物的预测结果。分析结果表明：象山近岸海域主要污染物为无机氮。用预测结果和实际数值通过残差验证,最后模拟出今后几年的监测值,为象山县近岸海域生态环境相关管理部门提供数据支撑和决策依据。     

2014年秋季渤海网采浮游植物群落结构

基于2014年秋季在渤海进行的水文、化学和生物方面的综合大面调查,研究了渤海网采浮游植物群落的结构特征,并结合文献资料,分析影响浮游植物群落结构形成的原因。结果显示：2014年渤海秋季共鉴定浮游植物3个门42属96种,其中以硅藻为主,为34属79种,占总物种的82%;甲藻门7属16种,占总物种的17%;金藻门1属1种。其中,角毛藻属的种类最多,共17种;其次为圆筛藻属,共13种。浮游植物总细胞丰度介于(0.71～72.15)×10⁴ cells/m³,平均为13.88×10⁴ cells/m³,硅藻与甲藻细胞丰度比值为2∶1,硅藻在莱州湾的细胞丰度极显著高于其他海区,甲藻在渤海中部海区的细胞丰度显著高于其他海区。浮游植物优势种主要为星脐圆筛藻(Coscinodiscus asteromphalus)、威氏圆筛藻(C. wailesii)、具槽帕拉藻(Paralia sulcata)、梭状角藻(Ceratium fusus)和夜光藻(Noctiluca scintillans)。渤海秋季浮游植物群落多样性水平分布不均,局部海域由于单一优势种过量繁殖多样性降低,低值区分布于辽东湾和渤海海峡海域。与历史同期资料对比,渤海海域浮游植物群落出现明显的物种演替现象,甲藻中的角藻逐渐兴起,其在渤海中部及辽东湾的优势地位已经超过角毛藻属和圆筛藻属,渤海秋季局部海区浮游植物群落结构已经由硅藻控制转为硅藻和甲藻共同控制。