A pattern in the incidence of major coastal mudslides     

J. N. Hutchinson 《地球表面变化过程与地形》1983,8(4):391-397

The communication considers eroding coastal cliffs which consist predominantly of stiff-fissured clay overlying a more resistant stratum, the contact having a gentle component of coastwise dip. From the southern coasts of England, five such cliffs are described. In each of these a zone of dominant mudsliding exists, which stands out from the background of lesser mudslides and other forms of failure: the common feature is that in each case the zone of major mudsliding coincides closely with the length of cliff over which the base of the clay stratum lies within the tidal range, and generally within the upper part of this. It is suggested that this pattern results from optimum conditions for continuing stimulation of mudslide activity by toe erosion being reached in the above zone.  相似文献   

我国不同赋存状态烃类气体的研究现状与展望   总被引：5，自引：0，他引：5  

张晓宝  徐永昌 《地球科学进展》1997,12(3):230-235

不同赋存状态烃类气体（包括游离的天然气、吸附气、酸解气、水溶气和油溶气）研究对于烃源岩评价、天然气成因判识、油气复合关系研究，油气源对比和油气勘探均具有十分重要的理论和应用价值。我国经过“六五”、“七五”和“八五”期间组织天然气地学攻关，在该领域内取得了较大进展。综述了我国不同赋存状态烃类气体的研究现状，分析了研究中存在的几个问题，并展望了其理论和应用前景。  相似文献   

南北问题跨世纪的发展态势     

刘力  郑京淑 《世界地理研究》1997,(2)

本文通过对南北问题的简要回顾，展现南北关系的变化过程及其时代特征，揭示南北问题的产生根源与实质，努力寻求解决南北问题的新途径，并对跨世纪南北问题的新发展进行展望。  相似文献   

干旱区绿洲研究回顾与问题分析   总被引：37，自引：0，他引：37  

贾宝全  慈龙骏  韩德林  杨洁泉 《地球科学进展》2000,15(4):381-388

从绿洲形成演变过程、绿洲气候效应、绿洲农业研究和绿洲生态环境保护4个方面,对国内外绿洲研究现状进行了简略回顾。分析后发现,虽然绿洲研究的成果颇丰,但也存在以下三方面问题:首先是概念认识上的混乱以及由此而导致的其它延伸性错误;其次人工绿洲研究相对要多一些,程度也更深入一些,但天然绿洲的研究则较为薄弱;第三,研究视野较小,所获结果缺乏与其它相关区域的对比分析,因而不能够判定其实际价值。在研究工作存在分岐的同时,所有研究者均承认绿洲是一种景观,但是从该角度进行研究的工作却鲜有报导,因此,绿洲景观方面的研究应是发挥交叉学科优势、避免分歧进一步产生的一个很有意义的研究方向。  相似文献   

昆河新线玉蒙段工程地质问题及对策     

刘伟  张兵 《云南地质》2007,26(3):328-334

昆河新线玉蒙段的主要工程地质问题是地震及活动断裂、膨胀土、软土、砂土液化、岩溶、不良斜坡及特殊岩土等,对铁路工程影响很大。文章论述沿线存在的主要地质问题,提出相应的工程措施建议。  相似文献   

昆明盆地地热资源及开发     

杨艳华  和怀忠  任世川 《云南地质》2004,23(1):30-37

昆明盆地已有逾百口地热开采井，分布密度极不均匀。由于科学管理和依法管理不够完善，导致在地热资源开发利用中出现环境负面影响。本文通过十几年的地热水动态监测数据处理分析研究，并结合现有开发现状，探究昆明地热资源开发利用中的环境问题，以供管理决策提供科学依据。  相似文献   

青海省地震安全性评价历程与现存的问题     

王赞军  党光明 《高原地震》2002,14(4):18-22

在回顾总结青海省地震安全性评价历程的基础上，分析了目前尚存在的突出问题。  相似文献   

The added value of participatory modelling in fisheries management – what has been learnt?     

Christine Röckmann  Clara Ulrich  Marion Dreyer  Ewen Bell  Edward Borodzicz  Päivi Haapasaari  Kjellrun Hiis Hauge  Daniel Howell  Samu Mäntyniemi  David Miller  George Tserpes  Martin Pastoors 《Marine Policy》2012

How can uncertain fisheries science be linked with good governance processes, thereby increasing fisheries management legitimacy and effectiveness? Reducing the uncertainties around scientific models has long been perceived as the cure of the fisheries management problem. There is however increasing recognition that uncertainty in the numbers will remain. A lack of transparency with respect to these uncertainties can damage the credibility of science. The EU Commission's proposal for a reformed Common Fisheries Policy calls for more self-management for the fishing industry by increasing fishers' involvement in the planning and execution of policies and boosting the role of fishers' organisations. One way of higher transparency and improved participation is to include stakeholders in the modelling process itself. The JAKFISH project (Judgment And Knowledge in Fisheries Involving StakeHolders) invited fisheries stakeholders to participate in the process of framing the management problem, and to give input and evaluate the scientific models that are used to provide fisheries management advice. JAKFISH investigated various tools to assess and communicate uncertainty around fish stock assessments and fisheries management. Here, a synthesis is presented of the participatory work carried out in four European fishery case studies (Western Baltic herring, North Sea Nephrops, Central Baltic Herring and Mediterranean swordfish), focussing on the uncertainty tools used, the stakeholders' responses to these, and the lessons learnt. It is concluded that participatory modelling has the potential to facilitate and structure discussions between scientists and stakeholders about uncertainties and the quality of the knowledge base. It can also contribute to collective learning, increase legitimacy, and advance scientific understanding. However, when approaching real-life situations, modelling should not be seen as the priority objective. Rather, the crucial step in a science–stakeholder collaboration is the joint problem framing in an open, transparent way.  相似文献   

江苏溧阳城区地震应急避难场所建设中存在的问题和思考     

胡米东 《山西地震》2012,(2):37-39,45

文章介绍江苏溧阳城区地震应急避难场所建设的状况及建设过程中存在的问题,提出几点改进建议,为避难场所的建设更加规范化,确实发挥应急避难场所的减灾能力和运转效率提供参考。  相似文献   

中国食物问题及其对策初探     

曾尊固 《云南地理环境研究》1989,1(2):18-26

经过十年改革,我国的食物生产有了明显增长,人民的营养水平得到较大提高。但是人均占有土地继续减少和人民消费需求不断增长的趋势,使我国的食物供应面临严峻的挑战。本文从确立适合国情的食物消费结构、扩大食物生产的途径以及合理组织食物贸易三个方面探讨了应该采取的主要对策。  相似文献