GPRS数据传输系统在近海监测的应用研究

通过对GPRS数据传输技术的研究,指出了作为近海监测中使用该技术所应该注意和需要解决的问题,并对这些问题详细分析并提出合理的解决方案,通过实例分析说明GPRS数据传输技术的应用前景与意义。     

海上退役石油平台处置技术体系初步框架

在系统研究国外海洋石油平台被拆除技术进展的基础上,结合埕岛油田退役石油平台处置技术构建的实践经验,全面分析了海洋石油平台被拆除技术的全过程,具体包括:海洋石油平台状况调查、海上石油平台拆除的准备工作、拆除技术的选择、最终处置、环境影响分析与评估。     

Applications of water sensitivity in situ remediation at saltwater-freshwater interface

Based on the laboratory experiments with the saltwater and freshwater replacing each other in the level sand column, taking the kaolin, illite, smectite, bivalent hydrargyrum ion (Hg²⁺) and phenol (C₆H₅OH) as examples, this paper studies the applications of water sensitivity in situ remediation in saltwater-freshwater transition zone. In the water sensitivity process, the release and migration of clay minerals can make the hydraulic conductivity (HC) decrease and pollutants remove. A new type of low penetrable or impenetrable purdah can be built by adding clay minerals into the sand media to replace the underground concrete impenetrable wall to prevent seawater intrusion, and a number of the heavy metals and organic pollutants in the sand media can be removed by in situ remediation. The results show that the content of kaolin and illite influences the water sensitivity process slightly, and HC of the sand columns descends from 0.011 cm/s to 0.001 4 cm/s and 0.001 2 cm/s respectively even if the content reaches 12% (weight ratio, sic passim). However, for smectite, HC descends sharply to about 1×10⁻⁸ cm/s when its content reaches 4%, and no water can flow through the sand columns beyond 5%. The particle release and migration processes can remove the Hg²⁺ and C₆H₅OH out of the sand columns efficiently, the removing rate of Hg²⁺ is 31.68% when the freshwater and saltwater are filtered through the sand columns polluted by Hg²⁺, while it is 67.55% when the water sensitivity occurs. With the same method, the removing rates of C₆H₅OH under the fluid flow and water sensitivity are 55.71% and 43.43% respectively. Supported by National Natural Science Foundation of China (No. 40572142). HAN Zhiyong, born in 1976, male, Dr, associate Prof.     

Applications of Water Sensitivity In Situ Remediation at Saltwater-Freshwater Interface

Based on the laboratory experiments with the saltwater and freshwater replacing each other in the level sand column, taking the kaolin, illite, smectite, bivalent hydrargyrum ion (Hg2+) and phenol (C6H5OH) as exam-ples, this paper studies the applications of water sensitivity in situ remediation in saltwater-freshwater transition zone. In the water sensitivity process, the release and migration of clay minerals can make the hydraulic conductiv-ity (HC) decrease and pollutants remove. A new type of low penetrable or impenetrable purdah can be built by adding clay minerals into the sand media to replace the underground concrete impenetrable wall to prevent seawater intrusion, and a number of the heavy metals and organic pollutants in the sand media can be removed by in situ remediation. The results show that the content of kaolin and illite influences the water sensitivity process slightly, and HC of the sand columns descends from 0.011 cm/s to 0.001 4 cm/s and 0.001 2 cm/s respectively even if the content reaches 12% (weight ratio, sic passim). However, for smectite, HC descends sharply to about 1×10-8 cm/s when its content reaches 4%, and no water can flow through the sand columns beyond 5%. The particle release and migration processes can remove the Hg2+ and C6H5OH out of the sand columns efficiently, the removing rate of Hg2+ is 31.68% when the freshwater and saltwater are filtered through the sand columns polluted by Hg2+, while it is 67.55% when the water sensitivity occurs. With the same method, the removing rates of C6H5OH under the fluid flow and water sensitivity are 55.71% and 43.43% respectively.     

海洋环境工程勘察行业现状和发展趋势

海洋工程勘察行业属于海洋经济的支持层,依附并服务于海洋经济核心产业.海洋工程勘察所能获取的海洋数据资料基本上涵盖了所有海洋要素,所以广泛应用在跨海大桥,码头、沿海核(火)电站、海底通讯光缆、电缆路由、海底输油管道路由和海上石油平台场址等海洋工程建设中.有海洋工程勘察甲级资质的单位大部分在沿海城市,海洋工程勘察行业普遍存在的问题均在于缺少复合人才型的勘察技术人员、先进的勘察设备和装备完善的勘察船只.     

侧扫声纳系统在海底管道悬空调查中的应用

本项目以钢管模拟海底管道的悬空状态,根据海上试验结果并结合地貌历史资料的对比分析得出以下结论:在海底管道悬空调查中,使声纳拖鱼至海底管道的发射声波与海底面的夹角θ保持在15°至20°之间,资料效果最为理想.