海洋陆源性污染联防联控机制的SD仿真分析——基于浙江省的经验证据          下载免费PDF全文

王方  胡求光 《海洋开发与管理》2020,37(11):75-83

随着沿海地区经济的快速发展，海洋陆源性污染日益严重，加强陆海统筹、联防联控治理已迫在眉睫。文章基于系统动力学（SD），构建系统仿真模型，研究不同的联防联控机制情景对浙江省海洋陆源性污染的影响效应。仿真结果表明：联防联控机制将有效减少浙江省入海陆源废水的排放，但是对GDP影响较弱；相较于维持联防联控机制的实施现状，提高排污标准、技术投入、环境治理投资总额、法律约束力等联防联控三大机制的实施强度对浙江省海洋陆源性污染的治理效应更为显著；不同联防联控机制情景的仿真结果存在一定的差异，技术投入和环境治理投资总额的增加对浙江省海洋陆源性污染的治理效果最为明显。提出：制定更加严格的排污标准,控制陆源污染源头;拓宽环境治理投资和技术投入的支持渠道,提高陆源污染物净化效率;完善联防联控立法,加强联合防治监管能力,强化法律的约束力等建议。  相似文献   

盾构隧道与矿山法隧道接合部施工工艺     

张二海  洪健  吴文涛 《岩土钻凿工程》2010,(1):88-90

深圳地铁2号线蛇海区间采用盾构法＋矿山法施工,但由于受地层及周边环境的限制,隧道接合部难以按原设计进行施工。经过研究比对,实际施工时采用了一种新的施工工艺,问题得以顺利解决,可供类似工程参考。  相似文献   

Limitations of 1992CLC/FC and enactment of the Special Law on M/V Hebei Spirit incident in Korea     

Dong-Oh Cho 《Marine Policy》2010

Since the adoption of the 1969CLC and the 1971FC, the international oil-spill compensation regime has improved compensation for loss and damage caused by tanker oil spills. However, this regime has inherent limitations, such as protracted compensation payments and controversies over the scope and type of economic losses, including environmental damages, and the cost of environmental restoration. Therefore, given large oil-spill incidents, such as the Erika, Prestige, and Hebei Spirit, each government, respectively, has addressed compensation by enacting special laws or establishing domestic programs. This article contains a historical and legal analysis of the Hebei Spirit incident and discusses the limitations and necessary improvements to the international oil-spill compensation regime.  相似文献   

电偶源频率电磁测深视电阻率多参量联合反演效果检验          下载免费PDF全文

陈军营  林长佑  王书明  杨长福 《地震工程学报》2001,23(3):279-285

通过大量的数值模拟试验，对电偶源频率电磁测深（FEMS）视电阻率多参量联合反演的效果进行了检验和对比。结果表明，多参量联合反演具有较快的收敛速度和较高的拟合精度。  相似文献   

Breakage assessment through cluster analysis of joint set orientations of exposed benches of opencast mines     

P. Pal Roy 《Geotechnical and Geological Engineering》1995,13(2):79-92

Summary This paper substantiates, through three different case studies, that the breakage assessment of opencast bench blasting can be made scientifically through the analysis of joint set orientations of different exposed benches in association with the corresponding face direction. Joint orientations, dip and strike of bedding planes have a significant influence on rock breakage. They can have decelerating effects on blasting performance, which may be rectified by geological mapping, and subsequently modifying the blast design parameters.  相似文献   

岩石结构面几何特征的分形与分维   总被引：11，自引：0，他引：11  

徐光黎 《水文地质工程地质》1993,20(2):20-22

本文引用B.B.Mandelbrot创立的分形几何学这一新理论及其思维方法,对岩石结构面的几何特征,包括规模、隙宽、密度和粗糙度进行分形分析。结果表明,在10~7级范围内,结构面几何特征呈现出很强的自相似性,其分数维分别为0.8272、0.8173和2.1385;粗糙度JRC则由分数维方便地定量地表征。这一客观规律的揭示,对各种尺度结构面几何特征、渗透路线的形态和流速趋势的确定具有重要的理论价值和现实意义。  相似文献   

The rupture process during the 1999 Düzce, Turkey, earthquake from joint inversion of teleseismic and strong-motion data     

Nur Umutlu  Kazuki Koketsu  Claus Milkereit 《Tectonophysics》2004,391(1-4):315

Teleseismic and strong-motion data are inverted to determine the rupture process during the November 1999 Düzce earthquake in NW Turkey. The fault geometry, rise time and rupture velocity are determined from the aftershock distribution and preliminary inversions of the teleseismic data. Joint inversion of the teleseismic and strong-motion data is then carried out for the slip distribution. We obtain the strike 264°, dip 64°, rake −172°, seismic moment 5.0×10¹⁹ N m (M_w 7.1), and average stress drop 7 MPa. This earthquake was characterized by bilateral fault rupture and asymmetric slip distribution. Two asperities (areas of large slip) are identified, the eastern one being 1.5 times larger than the western one. The derived slip distribution is consistent with the aftershock distribution, surface rupture and damage. The point of rupture initiation in this Düzce earthquake coincided with the eastern tip of the aftershock distribution of the August 1999 Izmit earthquake.  相似文献   

华北中北部地区震源参数和场地响应的联合反演   总被引：9，自引：2，他引：9  

王勤彩  高景春  郑斯华  刘杰  陈章立  刁桂苓  赵英萍  刘胜国  张从珍 《中国地震》2004,20(2):187-196

利用遗传算法反演华北中北部地区27个地震震源谱的低频水平、拐角频率和25个台站的场地响应。具体方法是利用研究区的平均衰减模型对记录谱进行路径校正，然后假定每一个地震的ω^2模型，调整低频水平和拐角频率使所有台站场地响应的标准偏差最小，最后给出参与计算的每个台站的场地响应。结果表明，17个基岩台中11个台的场地响应在1～20Hz范围内接近1，6个基岩台的场地响应部分频段放大或缩小3倍以上。8个井下摆台站的场地响应形态相同，表现为低频放大，高频部分迅速衰减。地震矩与震级的关系为logM0=17．1 1．13ML，地震矩与震源半径的关系为logM0=19．4 0．0052r。  相似文献   

Seepage problems in the right abutment of the Shahid Abbaspour dam, southern Iran   总被引：1，自引：0，他引：1  

M.H. Ghobadi  G.R. Khanlari 《Engineering Geology》2005,82(2):119-126

In this study, seepage phenomena through the right abutment of Shahid Abbaspour dam are investigated. The Shahid Abbaspour dam is a 200 m high arch dam, which regulates the waters of the Karun River, serves power generation, and flood control and irrigation needs. The dam site lies in the Zagros Mountains of southern Iran. This region presents continuous series of mainly of karstic limestone, marl, shale and gypsum ranging in age from Jurassic to Pliocene. The region has subsequently been folded and faulted. Seepage from the Shahid Abbaspour reservoir occurs mainly through the karstic limestone.The basic foundation treatment of the dam consisted of consolidation grouting, a high-pressure grout curtain and a drainage curtain. Moreover, a 144 m high and 30 m wide concrete cutoff wall was built to prevent reservoir seepage through a clay-filled fracture zone in the right abutment. The grout curtain penetrates the “Principal Vuggy Zone” only beneath the central portion of the dam and below the cutoff wall. In the right abutment fan curtains were constructed to reduce drainage flows, but the seepage problem could not be solved. In order to determine the seepage direction and karstification pattern, hydrogeological studies have been carried out. Additional investigation boreholes have been drilled to monitor fluctuations in groundwater level. Besides these, water chemistry, dye tracer, pinhole and XRF tests have been carried out. As a result of these studies, seepage paths have been identified in the karstic limestone in the right abutment of the dam.  相似文献   

天山中东段地区震源参数的初步应用研究   总被引：3，自引：0，他引：3  

夏爱国  赵翠萍 《内陆地震》2006,20(3):245-251

采用多台多地震联合反演的方法,首先得到了新疆天山中东段地区2001年以来MS≥2.5的105次中小地震的震源谱,进而测定了地震矩、拐角频率与应力降等震源参数,并讨论了它们之间的相互关系。在此基础上开展了该研究区应力降时空变化的动态跟踪工作,最后对研究区2004年6月以前的应力降时空演化特征做了一定程度的探讨。分析表明,该地区的地震矩、拐角频率与应力降等震源参数与震级有一定的相关性,应力降的时空演化特征可以作为该地区今后地震趋势预测的一种新手段。  相似文献