矿山土地复垦方案中对开采塌陷区预测方法的探讨     

冉启洋  杨洪 《贵州地质》2010,27(1):54-58

通过对土地复垦方案采用的几种方法的比较及分析,选择导水裂隙带最大高度与移动角组合判别法的方法,圈定出矿山因开采易导致地表塌陷的区域,为矿山土地复垦方案中主要拟破坏土地的确定提供方便、实用的方法。  相似文献   

中国防洪若干重大问题的思考   总被引：2，自引：0，他引：2       下载免费PDF全文

李原园  郦建强  石海峰  沈福新  文康  李琪  李蝶娟  李福绥  雷 Wen 《水科学进展》2010,21(4):490-495

为配合中国水利部组织编制全国主要江河防洪规划工作,对与编制防洪规划有关的若干重大问题进行了研究。提出用20世纪发生过的大洪水淹没范围作为界定防洪区的基础;风险管理最重要的是规避风险和应对风险,而规避风险的核心是约束人类不合理的经济社会活动,降低洪水灾害造成的风险;当防洪区受到两种洪水风险威胁时,应当采用二维概率分布核查防洪区的标准;合理提高城市防洪标准,是城市防洪的首要任务;要协调城市防洪与城市建设的关系,充分发挥城市拦蓄雨洪的作用(如保留必要的水面率、雨水利用等),蓄排兼顾,而不宜过分强调城市排水;建议根据淹没水深、淹没历时和洪水频率组成的洪水风险度因子划分蓄滞洪区风险区,并结合蓄滞洪区自然地理条件比选安全建设模式。  相似文献   

“打滑”岩层回转钻进采用低工艺规程初探          下载免费PDF全文

罗文来  张延军  李运海 《探矿工程》2010,37(7):4-8

通过对岩石破碎机理的再探讨,提出在坚硬致密弱研磨性岩层（俗称＂打滑＂地层）的金刚石回转钻进中采用低工艺规程,在探索和实际应用中取得很好的效果,尤其在中深孔中转速开不上去时也取得好的效果。  相似文献   

土地综合整治项目成功范例分析——以临沂市兰山区李官镇为例          下载免费PDF全文

王美菊  杜庆利  王玉慧 《山东国土资源》2014,30(7):96-99

通过阐述临沂市兰山区李官镇土地综合整治项目实施这一成功范例,提出实施土地综合整治项目应抓住的6个关键环节,分析了每个环节的作用和操作方法,希望对破解当前土地综合整治项目实施难的问题有所帮助。  相似文献   

Governance strengths and weaknesses to implement the marine strategy framework directive in European waters     

《Marine Policy》2014

The ambitious Marine Strategy Framework Directive (MSFD) has been the focus of much marine research across Europe in the pursuit of achieving Good Environmental Status in the four European Union marine regions; Baltic Sea, Black Sea, Mediterranean Sea and North-east Atlantic. This research addresses the Strengths, Weakness, Opportunities and Threats (SWOT) of the current European marine governance structures and its relationship to implement the MSFD. Results of the SWOT analysis were acquired through a combination of approaches with MSFD experts and stakeholders including: 30 face-to-face interviews, an online survey with 264 stakeholder respondents and focus groups within each European marine region. The SWOT analysis concurrently identifies common strengths and weakness and key governance issues for implementing the MSFD for European marine regions. This paper forms one assessment within the governance component of the Options for Delivering Ecosystem Based Marine Management (ODEMM) project and presents timely issues that can be of benefit to national and European Union policy makers.  相似文献   

National comprehensive approaches for rebuilding fisheries in South Korea     

《Marine Policy》2014

Korea's coastal and offshore fisheries have experienced reduction in their catch in the early 2000. The amount of catch from coastal and offshore fisheries dropped from 1.7 million tons in 1986 to 1 million tons in 2004. To address such catch reduction, fish stock enhancement programs have been constantly developed and implemented. However, as fish stocks have been estimated to decrease since 2000 in spite of various management measures, the Korean Government genuinely acknowledges the necessity to enhance fisheries productivity through the recovery of depleted fish stocks. Based on such acknowledgement, a fish stock rebuilding plan (FSRP) combined with conventional fish stock enhancement programs was established in 2005. For stocks which have shown drastic decrease, a FSRP was set up and promoted. So far, 10 FSRPs have been established and operated, and plan is being made to expand them to 20 species by 2012. The result of pilot projects shows that stocks have been increasing after the introduction of FSRPs. For instance, the catch per unit effort (CPUE) of sandfish in the East Sea has increased from 0.44 in 2005 to 0.78 in 2011. Consequently, fishing income has increased by 15%. The key lessons learned during the implementation of FSRP are: the causes for the decrease of stock vary and are complicated and it is necessary to adjust and eliminate some conventional policies that could have unforeseen negative impacts on fish stocks. The FSRP-based fisheries management policy in Korea carries great significance, for it has changed the focus of policy from simply maintaining the status quo to stock recovery and it allows relevant stakeholders to get actively involved in the procedures of establishing and promoting the plan, leading to effective implementation of the plan. The current FSRP is operated with species, but if it can be gradually expanded to encompass the whole ecosystem, it will greatly contribute to more effective management and fish stock recovery for all species in offshore and coastal waters surrounding Korea.  相似文献   

“平、剖面三维联动编辑”的实现途径     

李青元  张威  周顺  宋博辇  魏新永 《中国煤炭地质》2014,(1):67-72

基于对平、剖面三维联动编辑的概念、动因的探讨及相关研究成果的认识,提出了平、剖面三维联动编辑的几何原理与实现途径,如:地质曲面的表达、基于等高线的曲面构建、剖面图的构建、以及平面图与剖面图的联动修改方法。并对三维地质建模的需求、矿产资源勘探应提交的三维地质模型、三维地质建模的数据标准以及广义的三维联动编辑等问题进行了延伸讨论。认为平、剖面三维联动编辑可能成为三维建模软件推广应用中的"杀手级应用"。  相似文献   

大兴迭隆起隐伏岩溶水资源评价及开采方案预测   总被引：2，自引：2，他引：0  

南天  李鹏  李星宇  王新娟  谢振华  邵景力 《中国岩溶》2014,33(2):156-166

大兴迭隆起地区隐伏岩溶地下水是北京市的重要水源,为保障水源地能持续为大兴、通州地区提供优质的城镇生活用水,需对研究区岩溶地下水进行水资源评价和开采规划预测分析。利用数值模拟法,应用GMS模拟软件对研究区岩溶水系统进行地下水流数值模拟及水位变化预测。建立的岩溶水系统模型分为5层,模拟验证期为12年9个月。由模型评价的岩溶水系统补给资源量为14 425.74×10^4m3/a,可开采资源量为14 310.52×10^4m3/a,其中岩溶含水层可开采量为2 309.36×10^4m3/a。在模型识别验证后,分4种开采方案对水源地进行开采预测,通过对典型观测孔水位过程线拟合和研究区水均衡分析可知,按2020年之前维持现状开采,2020年后停采念坛水源地,2025年后全区按可开采量进行开采的开采方案最为合理,可分批逐次实现水源地的采补平衡。  相似文献   

鸡西市数字地籍测量实施方案研究     

王宏伟 《测绘与空间地理信息》2014,(10):183-186

数字地籍测量是以计算机为平台,利用数字化设备采集野外数据,将数据存储在计算机里,利用数据处理软件和绘图软件生成地籍图、表册等地籍资料的一种自动化测绘技术。本文对地籍测量的内容与方法作了概述,主要阐述现代测量技术在地籍测量中的应用,对传统地籍测量技术和现代测量技术进行了比较,充分说明了现代测量技术的优越性;并对几种数字地籍测量模式进行了比较,针对不同要求的测量任务和不同环境的测区,应用不同的测量模式来完成任务,可提高测量效率和质量。  相似文献   

浙江省萧山北部地区农业地质环境调查成果     

顾金秋  汪庆华  董岩翔  任荣富  周建华  梁河 《浙江国土资源》2000,(2)

萧山北部地区农业地质环境调查从氮磷钾的合理配比和微量元素合理施用方面为农业生产科学施肥提供了科学的依据 ;从制定农田耕作层的保护措施 ,控制化肥施用 ,实行平衡施施肥 ,降低农田灌溉水的污染 ,充分发挥肥效等方面 ,提出了保护土地资源、实施“沃土计划” ;根据农业地质的基础资料进行了农业环境保护区划 ,将本区划分为沿江陆域岸线保护带、萧山南沙大堤保护带和农业环境保护区 ;并提出要加强钱塘江海堤建设 ,防治地质灾害的发生  相似文献