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海洋氢能作为一种清洁、低碳、高效且可再生的能源,逐渐成为目前我国实现“双碳”目标的重要能源载体,其开发对我国具有重大战略意义。但由于海洋氢能起步晚,目前存在技术成熟度不高、政策支撑较少、法律配套不完善等诸多困难。同时存在海域管辖权竞合、海洋环境污染、海洋生物多样性破坏以及国际合作开发难等问题。关于海洋氢能开发法律规制问题,在国际法层面,以《联合国宪章》《联合国海洋法公约》等基本法构建海洋氢能国际合作开发以及海洋环境保护的基本法律框架,以《生物多样性公约》和《BBNJ协定》为基础进一步对海洋环境污染和保护海洋生物多样性提出法律规范;在国内法层面,通过现有能源领域法律法规可知,《可再生能源法》填补海洋氢能开发法律空白;在海洋环境领域,我国法律法规对海洋氢能开发提出了环境影响评价的要求,以保障海洋生态环境不受侵害。综上所述,海洋氢能开发利用应当完善国内相关立法,制定有针对性的海洋氢能领域环境影响评价制度,以促成国际开发与合作。这些完善建议旨在为海洋氢能开发提供清晰的法律指导,促进其可持续发展和利用,同时保护海洋环境和社会稳定。 相似文献
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在国家倡导低碳经济的背景下,福建省不仅面临着传统能源资源短缺的问题,还亟须改变当前以煤炭为主的能源结构,以减少温室气体的排放。而相比于匮乏的化石燃料,福建省海洋能源储量丰富,海上风能、潮汐能、波浪能、海流能等主要海上能源蕴藏量均居全国前列。积极地发展低碳无碳的海洋能源产业,不仅可以增加能源供给,缓解能源短缺的问题,还能够优化福建能源资源结构。文章以低碳经济为基础,对福建省海洋能源资源储量、海洋能源产业发展的宏观政策背景以及社会经济背景进行分析,认为发展海洋能源产业是解决福建当前能源资源问题的必要手段,并从发展思路、海洋调查与评价、法制体系和政策规划构建、注重开发与环境保护相协调等4个方面为福建省海洋能源产业的发展提出建议。 相似文献
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海洋伏季休渔制度是一项重要的渔业资源养护管理制度。该制度自1995年实施以来取得了良好的效果,同时在国际上也产生了积极的影响。作为渔业管理领域中最为重要的制度之一,海洋伏季休渔制度目前只是一项渔业政策和措施,并没有上升到国家的法律和法规层面,该制度的效力远不能从根本上解决我国海洋渔业资源养护和可持续发展的问题。因此,文章对海洋伏季休渔制度的具体内容进行了深度分析,从法律与政策的关系出发,通过探讨国家立法、执法以及渔民守法等方面存在的问题,指出海洋伏季休渔制度作为一项渔业政策向法律和法规转变的必要性和条件,建议推动伏休政策的立法转变、加强渔业执法监督体制和加强政府对渔民的扶持政策。旨在进一步促进实施该制度,为海洋渔业资源的可持续发展服务。 相似文献
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从我国海洋立法角度研究我国现行的海洋法律制度,分析海洋法律制度的特点并指出我国海洋立法中存在的问题,在此基础上提出了完善我国海洋法律制度的对策. 相似文献
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胶州湾正面临着严重的环境问题,如湿地减少,海域面积不断缩小、纳潮量持续减小;水域污染严重,水质日益恶化;生物资源衰退等,针对这些问题,对涉及胶州湾的各级法律法规进行分析研究,找出了现行法律的欠缺之处:法律体系不完善、海洋执法水平较低、司法救济不足。立法方面,国家立法和地方立法不完善,尚未形成健全有效的胶州湾保护法律体系;执法方面,既往的执法工作取得了积极有效的成果,但执法能力仍然有待提高;司法方面,受制于我国司法体系,司法救济并没有真正到位。针对这些不足提出解决胶州湾法律问题的对策建议,主要有:健全海洋法律体系、提高海洋执法能力、健全司法救济制度。期望为青岛市整治胶州湾环境问题、合理开发利用胶州湾、保护胶州湾海洋环境提供参考。 相似文献
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海洋可再生能源产业发展前景广阔,构建我国海洋可再生能源产业统计指标体系是开展海洋可再生能源产业运行监测和评估的前提。文章概述国际和国内海洋可再生能源产业统计的现状,总结主要特点和问题;在明确统计范围、设计原则和数据获取途径的基础上,构建我国海洋可再生能源产业统计指标体系,其中综合发展统计指标体系包括基本情况、总体规模、技术装备、运营情况和科技创新5个一级指标和38个二级指标,产业链发展统计指标体系包括装置研发、电站设计、加工制造、配套材料和设备、海上施工以及咨询服务6个一级指标和31个二级指标;最后提出建立常态化统计制度、定期更新统计指标及其数据、建立数据库以及开展产业运行监测和评估的建议,以期为我国海洋可再生能源产业的发展、管理和政策制定提供参考。 相似文献
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随着海洋生态环境治理工作的推进,入海排污口造成的陆源污染问题逐渐成为制约海洋生态环境治理体系和治理能力现代化的重要因素。文章从我国入海排污口的现状出发,分析入海排污口对海洋生态环境的影响和治理入海排污口的必要性;法律作为社会治理的有效手段和工具,从法律视角研究我国治理入海排污口的改进措施。在入海排污口治理的相关立法中,《中华人民共和国海洋环境保护法》是减少海洋污染、保护海洋生态环境的专门法律,以该法为依托,从法律角度思考入海排污口造成的污染问题,研究备案制度在入海排污口治理中的可行性与运行的不足之处,分析现存的排污总量控制制度对入海排污口的管理现状,聚焦现有法律制度对入海排污口造成的入海污染物排放的监管局限。进而从完善入海排污口管理的具体细化立法,改进监管体系漏洞、促进监管体系全面性,以及提高公众对海洋环境污染防治的参与度等角度提出相应的法律建议。 相似文献
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我国海洋循环经济的发展需要相应的法律体系作为保障,但当前我国对于海洋循环经济的立法模式尚未确立,尤其在制度领域尚不健全,因此需要逐步明确我国海洋循环经济立法模式,完善现有法律制度,构建制度视阁下我国海洋循环经济的立法体系. 相似文献
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Chandralata Raghukumar G. Sheelu P. A. Loka Bharathi Shanta Nair C. Mohandass 《Marine Georesources & Geotechnology》2001,19(1):1-16
In order to assess the impact of deep-sea mining on the in situ benthic life, we measured the microbial standing stock and concentration of organic nutrients in the deep-sea sediments of the Central Indian Ocean Basin in the Indian pioneer area. Sediments were collected using box core and grab samples during September 1996. The total bacterial numbers ranged from 10 10 -10 11 cells per g -1 dry weight sediment. There was a marginal decrease in the number of bacteria from surface to 30 cm depth, though the subsurface section registered a higher number than did the surface. The highest numbers were encountered at depths of 4-8 cm. The retrievable number of bacteria were two orders less in comparison with the direct total counts of bacteria. An almost homogeneous distribution of bacteria, total organic carbon, living biomass, and lipids throughout the depth of cores indicates active microbial and benthic processes in the deep sea sediments. On the other hand, a uniform distribution of total counts of bacteria, carbohydrates, and total organic carbon in all the cores indicates their stable nature and suggests that they can serve as useful parameters for long-term monitoring of the area after the benthic disturbance. Further studies on temporal variability in this region would not only verify the observed norms of distribution of these variables but would also help to understand restabilization processes after the simulated benthic disturbance. 相似文献
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Arne Schnack-Friedrichsen Angela M. Davis Jim D. Bennell Dei G. Huws 《Marine Georesources & Geotechnology》2001,19(4):221-243
The interdependence between the seismo-acoustic properties of a marine sediment and its geotechnical/physical parameters has been known for many years, and it has been postulated that this should allow the extraction of geotechnical information from seismic data. Though in the literature many correlations have been published for the surficial layer, there is a lack of information for greater sediment depths. In this article, a desktop study on a synthetic seafloor model illustrates how the application of published near-surface prediction equations to subsurface sediments (up to several tens of meters burial depth) can lead to spurious predictions. To test this further, acoustic and geotechnical properties were measured on a number of sediment core samples, some of which were subjected to loading in acoustically-equipped consolidation cells (oedometers) to simulate greater burial depth conditions. For low effective pressures (representing small burial depths extending to around 10 meters subsurface), the general applicability of established relationships was confirmed: the prediction of porosity, bulk density, and mean grain size from acoustic velocity and impedance appears generally possible for the investigated sedimentary environments. As effective pressure increases through, the observed relationships deviate more and more from the established ones for the near-surface area. For the samples tested in this study, in some instances increasing pressure even resulted in decreasing velocities. There are several possible explanations for this abnormal behavior, including the presence of gas, overconsolidation, or bimodal grain size distribution. The results indicate that an appropriate depth correction must be introduced into the published prediction equations in order to obtain reliable estimates of physical sediment properties for greater subsurface depths. 相似文献
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Derek V. Ellis 《Marine Georesources & Geotechnology》2001,19(1):51-63
This article reviews information recently available from existing marine and coastal mining for responses to environmental issues affecting marine mining at different depths. It is particularly but not exclusively concerned with those issues affecting seabed biodiversity impact and recovery. Much information has been gathered in the past 10 years from shallow mining operations for construction aggregate, diamonds, and gold, from coastal mines discharging tailings to shallow and deep water, and from experimental deep mining tests. The responses to issues identified are summarized in a series of eight tables intended to facilitate site-specific consideration. Since impacts can spread widely in the surface mixing layer SML, and can affect the biologically productive euphotic zone, the main issues considered arise from the depth of mining relative to the SML of the sea. Where mining is below the SML, the issue is whether it is environmentally better to bring the extraction products to the surface vessel for processing (and waste discharge), or to process the extraction products as much as possible on the seabed. Responses to the issues need to be sitespecific, and dependent on adequate preoperational environmental impact and recovery prediction. For deep tailings disposal from a surface vessel, there are four important environmental unknowns: (1) the possible growth of "marine snow" (bacterial flocs) utilizing the enormous quantities of fine tailings particles (hundreds or thousands of metric tons per day) as nuclei for growth, (2) the possibility that local keystone plankton and nekton species may migrate diurnally down to and beyond the depth of deep discharge and hence be subjected to tailings impact at depth, (3) the burrow-up capability of deep benthos and their ability to survive high rates of tailings deposition, and (4) the pattern and rate of dispersion of a tailings density current through the deep water column from discharge point to seabed. Actions to obtain relevant information in general and site-specifically are suggested. 相似文献
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G. Parthiban 《Marine Georesources & Geotechnology》2000,18(3):223-235
Particle fluxes were measured 7 m above the sea bottom during the predisturbance, disturbance, and postdisturbance periods by using time series sediment traps attached to seven deep-sea moorings deployed in the INDEX experiment site in the Central Indian Basin. The predisturbance particle fluxes varied between 22.3 to 55.1 mg m -2 day -1 . Increased and variable particle fluxes were recorded by the sediment traps during the disturbance period. The increase observed was 0.5 to 4 times more than the background predisturbance fluxes. The increases in particle fluxes (~4 times) recorded by the sediment trap located in the southwestern direction (DMS-1) were the greatest, which could be the result of preferential movement of resuspended particles generated during the deep-sea benthic disturbance along the general current direction prevailing in this area during the experimental period. Also, the traps located closer to the disturbance area recorded greater fluxes than did the traps far away, across the Deep Sea Sediment Resuspension System path. This variability in recorded particle fluxes by the traps around the disturbance area clearly indicates that physical characteristics such as grain size and density of the resuspended particles produced during the disturbance had an important effect on particle movement. The postdisturbance measurements during ~5 days showed a reduction in particle fluxes of ~50%, indicating rapid particle settlement. 相似文献
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海上大直径钢管桩打桩过程中,桩周土体受到强烈扰动而发生强度弱化,掌握桩周土体强度弱化规律对于准确预测打桩过程、保证工程安全具有重要意义。为研究土体强度弱化规律,开展了环剪试验模拟打桩对桩周土体的扰动,测试土体强度随剪切速率的变化规律,建立了描述土体强度弱化规律的拟合公式,引入到打桩分析软件中。研究结果表明：土体的强度折减程度不仅与土体本身的性质有关还受到土体的埋深和剪切速率的影响,埋深越深土体强度折减程度越低,剪切速率越高土体强度折减越高,在打桩分析中可采用这里推荐的线性折减方法来模拟不同深度处土体强度的折减规律。 相似文献
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Geoacoustic Inversion via Genetic Algorithm and Its Application to Manganese Sediment Identification
An acoustic inversion method using a wide-band signal and two near field receivers is proposed and applied to multiple layered seabed models including a manganese sediment. The inversion problem can be formulated into a probabilistic model comprised of signals, a forward model, and additive noise. The forward model simulates wide-band signals, such as chirp signals, and is chosen to be the source-waveletconvolution plane wave modeling method. The wavelet matching technique, using weighted least-squares fitting, estimates the sediment sound-speed and thickness on which determination of the possible numerical ranges for a priori uniform distribution is based. The genetic algorithm is applied to a global optimization problem to find a maximum a posteriori solution for determined a priori search space. Here the object function is defined by an L 2 norm of the difference between measured and modeled signals. Not only the marginal pdf but also its statistics are calculated by numerical evaluation of integrals using the samples selected during importance sampling process of the genetic algorithm. 相似文献
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Shigehisa Nakamura 《Marine Geodesy》2000,23(1):55-61
Specific properties of the interannual sea level variations and annual tides in the Northwestern Pacific were studied. Several tide stations were monitored. The monthly mean sea level for the year of 1995 was analyzed at each tide station. A seismic event in 1995, some tectonic activity around the subject area, and the Kuroshio (the oceanic western boundary current) may possibly contaminate results which would have occurred from the astronomical annual tide alone. 相似文献
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The advanced piston corer (APC) has been used by the Ocean Drilling Program since 1985 for recovering soft sediments from the ocean floor. The pullout force measured on extracting the core barrel from the sediment is shown to correlate with the average shear strength of the sediment core measured in the ship's laboratory. A simple rule of thumb is derived relating the shear strength of the sediment to the pullout force. Multiple APC holes at individual sites allow the consistency of the pullout measurements to be assessed. The effects of different operational procedures during APC coring are also explored. Although generally applicable, the correlation between pullout force and laboratory measurements of shear strength breaks down for some APC holes, possibly because of the disturbance of some sediment types during the APC coring process. A better understanding of the physical process of APC coring, and its effect on the properties of the sediment both inside and immediately outside the core barrel, would indicate what confidence can be put on the measurement of pullout force as a way of evaluating the in situ shear strength of deep sea sediments. 相似文献
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The effect of different fixation and storage protocols on the flow cytometric (FCM) simultaneous analysis of bacterioplankton and phytoplankton in coastal seawater samples (Mediterranean coastal lagoons) was investigated. FCM measurements (cell number, fluorescence and scatter characteristics) were obtained through DAPI staining. Three fixatives [glutaraldehyde (GA), formaldehyde (FA) and paraformaldehyde (PFA)] and two storage (3 months duration) methods (5 °C and −196 °C) were tested. Two dominant populations were detected in studied samples: bacteria and eukaryotic picophytoplankton. Adding fixatives (2% final concentration) appears necessary to obtain FCM exhaustive counts of all the bacteria and phytoplanktonic cells. This was related to the permeation effect of fixatives which allowed a better DAPI staining of the cells. Maximum fluorescence, i.e. optimal staining of the cells was obtained with FA or PFA, and significant lower fluorescences with GA. Fixed samples stored at 5 °C induced rapid cell loss. Only storage in liquid nitrogen of samples fixed with FA or PFA, allows mid-term (≥4 months) preservation of bacteria or picophytoplankton cell numbers, and limited evolution of DAPI-induced fluorescence and scatter characteristics. 相似文献
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