共查询到19条相似文献，搜索用时 312 毫秒
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我国是世界最大的养殖用海国家，养殖用海不但影响人民自身利益和社会的和谐稳定，并且也关系到沿海地区的经济发展。当前，我国养殖用海在自然资源统一管理和生态文明建设的新形势下存在规划繁杂重叠、环境污染、产权制度不完善等问题。文章将从养殖用海历年确权及注销面积和当前养殖用海管理现状出发，阐述我国当前养殖用海面临的问题，找出养殖用海空间保障不足的原因，并依据我国当前养殖用海管理所处的形势，提出了划定养殖用海基准线、编制“多规合一”下的养殖用海专项规划、施行养殖用海用途管制和整治修复、加强养殖用海监督管理等建议，解决当前养殖用海问题。 相似文献
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肖惠武 《海洋与海岸带开发》2012,(5):27-31
文章通过对目前我国渔业用海面积、类型组成和地域结构等进行数据分析,结合实际,从养分失调、生境破坏、水域污染和范围缩小等方面阐述我国渔业用海面临的主要问题,提出应当实施完善审批报备制度、确保用海保有指标和强化依法用海意识等措施,以推进渔业用海保护工作与合理使用程度进一步提高。 相似文献
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为加强对海上风电项目的用海管理,规范海上风电产业的用海活动,促进海域空间资源的科学合理开发利用,文章采用海上风电用海权属、风机遥感影像解译和海上风电用海项目核查的数据,以2016年年底为时间节点,对江苏省海上风电用海项目的确权管理、疑似疑点疑区、项目承担企业和项目运营情况进行调查,并根据调查结果提出存在的问题和建议。研究结果表明:江苏省共确权海上风电用海项目44个,已建设40个,总建设面积为6 712.91hm~2;疑似疑点疑区海上风电用海项目有26个;项目承担企业主要包括华能国际电力股份有限公司等;已建成投产并网的海上风电用海项目有29个,总投资额近293亿元,年发电量约50kW·h,年产出额近34亿元;目前海上风电用海项目主要存在未取得海域证、部分风机偏离原批复界址范围和规划布局不合理的问题,未来应坚持保护优先和适度开发原则、规范项目管理、优化规划布局以及加强动态监测。 相似文献
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全国公共用海信息管理有待加强。首先,国家对公共用海尚无统一的定义,也没有相关法律法规或规范性文件出台,至今没有统一的管理模式;其次,有的公共用海存在多部门管理,海洋行政主管部门对一些公共用海信息掌握不全,国家海域动态监视监测系统公共用海信息短缺。鉴于目前公共用海信息管理现状,国家海洋行政主管部门应尽快出台公共用海管理的有关法律法规或规范性文件,规范公共用海信息管理,开展公共用海规划,确保公共服务设施用海需求,保证公共用海信息完整,为国家对海洋的宏观管理提供基础数据。 相似文献
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水下生产系统在海洋石油开发中的应用 总被引：5，自引：1，他引：5
水下生产系统是一种将全部或部分油气集输设备放置于海底，低成本开发海洋石油的先进方法。对这一方法的研究在我国仅是近几年的事情。本文根据我国海洋油田的具体情况，提出了多种开发边际油田的方案，可供设计、生产部门参考。 相似文献
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埕岛海上石油平台周边海底管道与电缆的探测技术研究 总被引：1，自引：0，他引：1
海上石油平台周边海底管缆密集,管线状废弃物多,且有相互交叉现象,常有管道与电缆分辨不清或将管线状废弃物误判成海底管缆等情况发生。这严重影响了生产运行和作业平台就位的安全,给指挥作业平台插桩、就位、船舶抛锚带来了很多困难和安全隐患。在埕岛油田平台附近海底管道电缆探测技术研究中,利用目前世界上已有的、对海底管缆探测较为有效的各种仪器设备和方法手段,进行了试点研究,从中寻求适合埕岛油田海区海底管道、电缆位置和埋设状况探测的最佳方法和手段。通过试点研究,对探测海底管道和电缆的各种仪器的探测性能、探测方法、探测过程中应注意的事项以及存在的问题进行了较全面的介绍。 相似文献
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埕岛油田复杂地形区地形变化趋势研究 总被引：1，自引：1，他引：0
位于1976年黄河口东侧的埕岛油田海底复杂地形区对海上石油开采、建立石油平台、铺设海底管线和电缆等造成了一定的困难和危害,通过1999年和2003年两次多波束测量资料对比,分析和研究了埕岛油田复杂地形区的地形变化趋势,为在该海域进行海上平台建设、海底管线和电缆的铺设提供决策依据。 相似文献
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Compliant offshore TLPs are essentially meant for deep oil/gas exploration and are usually constructed on the seashore and then towed down to the particular location for anchorage. They are connected to the sea bed by means of pretension cables. The increased use of TLPs in deep waters and necessity of reduction of usually high value of pretension make the effect of variable tension in the tether dynamics more significant. This work presents the dynamic analysis of tethers and TLPs considering the linearly varying tension along the tether length. The modal analysis considers a linear cable equation for tether modeling subjected to tension which varies along its length. A Mathieu stability analysis is then performed for TLPs of different shapes and different water depth vis-à-vis of 527.8, 872, and 1200 m respectively to obtain the amplitudes of tether vibrations. The unstable modes of vibration are also verified. The resultant modal forms for the tether's dynamic model are then obtained in form of Bessel's function. From the numerical studies conducted it is seen that increased tether tension not only leads to a stable platform but also improves the stability due to increased hydrodynamic loading contributing to added mass. From the studies conducted it is also seen that the triangular configuration TLPs with increased initial pretension are more stable compared to four leg TLP in the first mode of vibration. 相似文献
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A.K. AgarwalA.K. Jain 《Ocean Engineering》2003,30(4):487-516
Many innovative floating offshore structures have been proposed for cost effectiveness of oil and gas exploration and production in water depths exceeding one thousand meters in recent years. One such type of platform is the offshore floating Spar platform. The Spar platform is modelled as a rigid body with six degrees-of-freedom, connected to the sea floor by multi-component catenary mooring lines, which are attached to the Spar platform at the fairleads. The response dependent stiffness matrix consists of two parts (a) the hydrostatics provide restoring force in heave, roll and pitch, (b) the mooring lines provide the restoring force which are represented here by nonlinear horizontal springs. A unidirectional regular wave model is used for computing the incident wave kinematics by Airy’s wave theory and force by Morison’s equation. The response analysis is performed in time domain to solve the dynamic behavior of the moored Spar platform as an integrated system using the iterative incremental Newmark’s Beta approach. Numerical studies are conducted for sea state conditions with and without coupling of degrees-of-freedom. 相似文献
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Many innovative floating offshore structures have been proposed for cost effectiveness of oil and gas exploration and production in water depths exceeding one thousand meters in recent years. One such type of platform is the offshore floating Spar platform. The Spar platform is modelled as a rigid body with six degrees-of-freedom, connected to the sea floor by multi-component catenary mooring lines, which are attached to the Spar platform at the fairleads. The response dependent stiffness matrix consists of two parts (a) the hydrostatics provide restoring force in heave, roll and pitch, (b) the mooring lines provide the restoring force which are represented here by nonlinear horizontal springs. A unidirectional regular wave model is used for computing the incident wave kinematics by Airy’s wave theory and force by Morison’s equation. The response analysis is performed in time domain to solve the dynamic behavior of the moored Spar platform as an integrated system using the iterative incremental Newmark’s Beta approach. Numerical studies are conducted for sea state conditions with and without coupling of degrees-of-freedom. 相似文献