2014年云南鲁甸地震触发地质灾害发育分布规律及与景谷、盈江地震对比研究   总被引：6，自引：0，他引：6  

殷志强  徐永强  陈红旗  撒兰鹏  姜兴武 《地质学报》2016,90(6):1086-1097

2014年8月3日16时30分,云南省鲁甸县龙头山镇Ms 6.5级地震造成617人死亡,触发1700多处崩塌滑坡等地质灾害点,同年,该省又发生了Ms 6.6级景谷地震和Ms 6.1级盈江地震。笔者在对鲁甸等3次地震区次生地质灾害现场调查和遥感解译的基础上,研究了鲁甸地震触发地质灾害的发育分布规律,首次提出了地震“干滑坡”的概念,并从震级、地形地貌、活动构造、人口密度等多个方面对比了鲁甸地震、景谷地震和盈江地震触发地质灾害的异同点。主要结论有：（1）鲁甸地震后新增地质灾害数量显著增加,其主要分布在水系的深切峡谷区,表现为“干滑坡”特征;（2）大型、特大型崩塌滑坡灾害点主要受活动断裂控制;（3）地震地质灾害的发育特征与地貌高程和微地貌具有很好的响应关系;（4）鲁甸震区的地形坡度明显大于景谷和盈江震区,地形坡度是鲁甸地震区地质灾害发育的主要控制因素;（5）我国西南高山峡谷区的断层、河流、阶地和城镇是相互依存,不可分割的地质环境载体,震后房屋选址、重建规划不仅要注意房屋抗震问题,还应充分考虑地质环境安全问题。  相似文献   

The role of sea ice in coastal and bottom dynamics in the Pechora Sea     

SA Ogorodov  AM Kamalov  GK Zubakin  Yu P. Gudoshnikov 《Geo-Marine Letters》2005,25(2-3):146-152

This article deals with the morpho- and lithodynamic role of ice in shaping the Arctic coasts. Taking the Pechora Sea as an example, the direct and indirect impact of ice on the sea floor and shores is described. Active gouging by ice floes, ice-rafting of sedimentary material, formation of strudel scour depressions and frozen rocks on shallows are all direct impacts. The indirect impact of ice that arrests the coastal zone for most of the year is a considerable reduction of the overall energy of waves and currents. Based on the performed analysis, we plot a schematic zonation of the Pechora Sea according to the probable impact of ice on the shores and seafloor.  相似文献   

DEM分辨率对小流域地形水文特征提取的影响   总被引：1，自引：0，他引：1  

萨出拉  刘万青 《测绘工程》2015,(5):72-76

基于ArcGIS水文分析工具研究DEM分辨率对提取流域地形和水文参数的影响,选择黄土丘陵沟壑区典型小流域—韭园沟流域为实验区,该流域地形复杂,沟壑纵横,DEM分辨率变化对其地形表达有很大影响。研究表明,DEM分辨率对小流域面积、流域高程、坡向的表达或提取精度影响较小,而对坡度、河道长度、河网密度和河道分级等因子提取有较大影响。  相似文献   

丹宁棉分离富集—发射光谱法同时测定地质样品中微量铌钽锆铪   总被引：1，自引：1，他引：1  

李滦宁  马玖彤等 《岩矿测试》2001,20(1):27-30

采用丹宁棉对地质样品溶液中的铌、钽、锆、铪进行分离富集，将写信后的丹宁棉在600℃灼烧30min，灰分用发射光谱法同时测定四元素。检出限与通常的发射光谱法相比降低约2个数量级，经国家级标准物质检验，结果与标准值相符，精密度试验，各元素的RSD（n＝20）为2.6％－7.9％。  相似文献   

Magnetometer array studies: A review of the interpretation of observed fields     

F.E.M. Lilley 《Physics of the Earth and Planetary Interiors》1975,10(3):231-240

A magnetometer array study consists of a number of variometers recording simultaneously across a two-dimensional area. Data recorded by an array should satisfy certain criteria, showing that transient magnetic events have been thoroughly monitored on the plane of observation. Interpretation of such data in terms of solid-earth geophysics involves two separate classes of problem. In the first the local geoelectric structure changes over a shorter lateral distance than does the inducing field. The observed response of the local structure is modelled numerically, taking the inducing field to be uniform. The parameters modelled are relationships between regional and anomalous horizontal and vertical field components. Operation of many instruments in an array should give better estimates of these parameters than operation of instruments singly, or in small groups. Numerical models constructed to fit observed data are non-unique, though the wide frequency range of geomagnetic events may perhaps be used to greater advantage in distinguishing between conductors in the upper crust, lower crust, and upper mantle. In constructing models a further complication arises in distinguishing between conductors simply concentrating current induced elsewhere, and conductors in which the induction is itself taking place.The second class of problem comprises determination of conductivity as a function of depth, utilizing non-uniformity in inducing fields. Here a large array of instruments should enable estimation of field gradients more accurately than is possible with fewer instruments. Interpretations published to date have perhaps not exploited this aspect of array information as fully as might prove possible.Some miscellaneous comments are: (1) daily-variation data in particular could resolve some depth ambiguity problems; (2) there is confusion in the literature between two possible definitions of phase; (3) ideas on optimum station spacing are still evolving; (4) it is not easy to decide an optimum ratio for time spent collecting data to time spent interpreting data; (5) array data have relevance to the study of electric currents in the ionosphere.  相似文献   

Anomalous geomagnetic variations and the concentration of telluric currents in south-west Queensland, Australia     

D. V. Woods  F. E. M. Lilley 《Geophysical Journal International》1980,62(3):675-689

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Geomagnetic induction in the Tasman Sea and electrical conductivity structure beneath the Tasman Seafloor     

I. J. Ferguson  F. E. M. Lilley  J. H. Filloux 《Geophysical Journal International》1990,102(2):299-312

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2000-2012年鄂尔多斯高原植被动态及干旱响应     

胡君德  李百岁  萨楚拉  包刚  张雪峰  张靖  谷俊杰 《测绘科学》2018,(4):49-58

针对鄂尔多斯高原植被覆盖变化受干旱胁迫的状况,该文结合降水和气温的协同变化,以2000-2012年生长季的MODIS-NDVI数据和同期降水、温度和帕尔默干旱指数为依据,采用线性趋势分析、标准偏差分析和相关性分析等方法,对鄂尔多斯高原植被与气候变化的相关关系和干旱异常变化对植被动态的影响进行了研究.结果表明:鄂尔多斯高原生长季及季节(春季、夏季和秋季)植被归一化植被指数主要受降水的控制和干旱的制约,秋季归一化植被指数更多地受到夏季干旱的影响.与气象因子的空间相关分析表明,春季温度上升有利于研究区北部归一化植被指数像元的增加.在荒漠草原和沙漠地区,夏季干旱与归一化植被指数的相关关系最强.秋季降水对典型草原归一化植被指数的提升显著.  相似文献   

Voluntary citizen participation in carbon allowance markets: the role of norm-based motivation     

ÅSA Lindman  Kristina Ek 《Climate Policy》2013,13(6):680-697

The results from a semi-experimental study of Swedish students’ stated willingness to purchase emission allowances for carbon dioxide are presented. Drawing heavily on recent developments in the literature on integrating norm-motivated behaviour into neoclassical consumer theory, it is assumed that individuals have a preference for maintaining a self-image as a responsible (and thus norm-compliant) person. The results indicate that students’ willingness to purchase carbon allowances is determined by both price and the presence of norms: those who feel personally responsible for contributing to reducing climate damages also appear more inclined to buy allowances. The empirical findings are consistent with the notion that a person's beliefs about others’ stated willingness to purchase carbon allowances imply improvements in their own self-image and ultimately behavioural change. This suggests that information campaigns that attempt to influence beliefs about others’ intentions could promote ‘green’ consumer behaviour in the carbon allowance market. Such (stated) behaviour also appears to be influenced by a person's awareness of the problem of climate change and their beliefs about their own ability to contribute to solving it.

Policy relevance

Although there is a concern that public goods such as reduced climate change may be under-provided in the free market, individual concern for the environment occasionally has profound impacts on consumer choice and voluntary action. This research suggests that information campaigns that attempt to influence beliefs about others’ intentions could promote ‘green’ consumer behaviour in carbon allowance markets. Publicly-provided information about the impacts of climate change and the ways in which these damages stem from individual choices could also induce this type of behaviour.  相似文献   

阻尼对地下隧道结构动力响应的影响   总被引：1，自引：0，他引：1  

徐英乾  戚承志  沙曼 《岩土力学》2012,33(Z2):196-200

用弹性地基梁来模拟地下隧道结构,推出考虑弯曲、轴力、剪切、内外阻尼以及在双参数地基模型上的振动方程。引用地下管道近似的位移计算方法,计算地下隧道结构,避免积分变换的繁琐,通过一种特殊的分离变量法,使得动力荷载以强加位移和速度的方式施加,实例计算中涉及内外阻尼项,可以方便地求出自振频率和阻尼比的表达式和考虑阻尼后结构位移衰减曲线,得出对于地下结构内阻尼的影响很小的结论。  相似文献