城市建设中的地震小区划与浅层地震探测     

薛荣俊  辛柏森  杨和乃 《中国海洋大学学报(自然科学版)》1993,(Z1)

简要阐述地震小区划在现代城市建设中的重要性以及在实施地震小区划的研究中浅层地震探测的重要作用及其方法原理,并给出应用浅层地震探测在城市地震小区划中的实例。  相似文献   

受陆岸影响浅水区台风风浪的计算方案     

《热带海洋学报》1994,(1)

在我国港口工程技术规范的波浪成长理论基础上，考虑到台风波浪的基本特点、等效水深的概念、浅水区波浪的折射、不规则波的能量分布特性、受陆岸和岛屿影响角度范围内的有效能量风区长度等因素，提出了受陆岸、岛屿影响浅水区（包括海湾区）台风风浪的计算方案。本方案只需台风中心位置、中心气压和计算点于各方位的风区长度（受陆岸影响部分）等资料，便可快速地得到计算点的波浪要素。经实测资料验证，效果良好。  相似文献   

环胶州湾公路海上段汽车尾气的环境影响     

杨三才  徐静琦  竺维丽  洪光  吴玉坤 《中国海洋大学学报(自然科学版)》1993,(1)

对类比路段进行连续模拟试验,进行现场调查,给出汽车尾气主要污染物的排污强度,预测了汽车尾气中CO、C_nH_m和NO_x的扩散范围。  相似文献   

胶莱盆地发育演化及其油气前景探讨   总被引：5，自引：0，他引：5  

李桂群  范德江  任景民 《中国海洋大学学报(自然科学版)》1994,(3)

根据胶莱盆地区域地质特征，地球动力学背景及盆地中、新生代沉积特征分析，论述盆地的发育和演化阶段，并对胶莱盆地含油气前景进行探讨。  相似文献   

Frequency-selective attenuation of sound propagation and reverberation in shallow water     

Qiu Xinfang  Zhang Renhe  Li Wenhu  Zhu Baixian  Jin Guoliang 《海洋学报(英文版)》1997,16(4):475-490

Ｆｒｅｑｕｅｎｃｙ－ｓｅｌｅｃｔｉｖｅ　ａｔｔｅｎｕａｔｉｏｎ　ｏｆ　ｓｏｕｎｄ　ｐｒｏｐａｇａｉｏｎ　ａｎｄ　ｒｅｖｅｒｂｅｒａｔｉｏｎ　ｉｎ　ｓｈａｌｌｏｗ　ｗａｔｅｒTXＦｒｅｑｕｅｎｃｙ－ｓｅｌｅｃｔｉｖｅａｔｔｅｎｕａｔｉｏｎｏｆｓｏｕｎｄｐ...  相似文献   

辽东湾葵花岛构造区浅层气分布特征、成因探讨及工程影响     

闫章存  刘燕平  曲伟  亓发庆 《海岸工程》2007,26(3):1-10

揭示了葵花岛构造区浅层气规模小、埋藏浅、分布散、压力低、储层松散等分布特点,根据沉积环境和地质特征,推测浅层气为生物甲烷气,但并不完全排除是热生甲烷次生气藏的可能性,探讨了浅层气潜在的工程危害并提出相应防治措施,为今后海洋工程建设提供科学依据。  相似文献   

4D seismic time-lapse monitoring of an active cold vent,northern Cascadia margin   总被引：1，自引：1，他引：1  

Michael Riedel 《Marine Geophysical Researches》2007,28(4):355-371

Two single-channel seismic (SCS) data sets collected in 2000 and 2005 were used for a four-dimensional (4D) time-lapse analysis of an active cold vent (Bullseye Vent). The data set acquired in 2000 serves as a reference in the applied processing sequence. The 4D processing sequence utilizes time- and phase-matching, gain adjustments and shaping filters to transform the 2005 data set so that it is most comparable to the conditions under which the 2000 data were acquired. The cold vent is characterized by seismic blanking, which is a result of the presence of gas hydrate in the subsurface either within coarser-grained turbidite sands or in fractures, as well as free gas trapped in these fracture systems. The area of blanking was defined using the seismic attributes instantaneous amplitude and similarity. Several areas were identified where blanking was reduced in 2005 relative to 2000. But most of the centre of Bullseye Vent and the area around it were seen to be characterized by intensified blanking in 2005. Tracing these areas of intensified blanking through the three-dimensional (3D) seismic volume defined several apparent new flow pathways that were not seen in the 2000 data, which are interpreted as newly generated fractures/faults for upward fluid migration. Intensified blanking is interpreted as a result of new formation of gas hydrate in the subsurface along new fracture pathways. Areas with reduced blanking may be zones where formerly plugged fractures that had trapped some free gas may have been opened and free gas was liberated.  相似文献   

氯化物型盐碱地池塘底泥中水溶性盐的分布特征     

张美昭  张兆琪  郑伟刚  董双林 《海洋湖沼通报》2001,(4):50-55

1997－1999年夏天，对位于黄河下游的氯化物型盐碱地池塘底泥中的水溶性盐进行了分析。结果表明：底泥中的含盐量，SO^2-4,Ca^2 ,Mg^2 含量是随着塘龄的增加而升高，而其余离子基本不随塘龄的增加而变化。各离子的垂直分布为“泥－土”混合层的含量较低，“水－泥”交界层含量较高。  相似文献   

中国近海的天然气勘探   总被引：1，自引：0，他引：1  

肖国林  陈建文 《海洋地质前沿》2003,19(8):47-52

据最新勘探资料，在综合分析中国近海海域天然气勘探现状、资源潜力及其区域分布规律的基础上，分析了我国近海海域天然气勘探的有利区带及目前比较现实的勘探目标，展示了我国近海海域天然气勘探的良好前景。  相似文献   

A preliminary study of carbon system in the East China Sea   总被引：1，自引：0，他引：1  

Shizuo Tsunogai  Shuichi Watanabe  Junya Nakamura  Tsuneo Ono  Tetsuro Sato 《Journal of Oceanography》1997,53(1):9-17

In the central part of the East China Sea, the activity of CO₂ in the surface water and total carbonate, pH and alkalinity in the water column were determined in winter and autumn of 1993. The activity of CO₂ in the continental shelf water was about 50 ppm lower than that of surface air. This decrease corresponds to the absorption of about 40 gC/m²/yr of atmospheric CO₂ in the coastal zone or 1 GtC/yr in the global continental shelf, if this rate is applicable to entire coastal seas. The normalized total carbonate contents were higher in the water near the coast and near the bottom. This increase toward the bottom may be due to the organic matter deposited on the bottom. This conclusion is supported by the distribution of pH. The normalized alkalinity distribution also showed higher values in the near-coast water, but in the surface water, indicating the supply of bicarbonate from river water. The residence time of the East China Sea water, including the Yellow Sea water, has been calculated to be about 0.8 yr from the excess alkalinity and the alkalinity input. Using this residence time and the excess carbonate, we can estimate that the amount of dissolved carbonate transported from the coastal zone to the oceanic basin is about 70 gC/m²/yr or 2 GtC/yr/area-of-global-continental-shelf. This also means that the rivers transport carbon to the oceans at a rate of 30 gC/m²/yr of the coastal sea or 0.8 GtC/yr/ area-of-global shelf, the carbon consisting of dissolved inorganic carbonate and terrestrial organic carbon decomposed on the continental shelf.  相似文献