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地域力与社会重建——以日本阪神淡路地震为例 被引量:7
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作者 田毅鹏 张炎 《福建论坛(人文社会科学版)》 CSSCI 北大核心 2008年第8期37-39,共3页
20世纪90年代末,以阪神淡路地震为契机,日本学界围绕着地域力与社会重建之关系展开了深度反思,形成了地域力研究的高潮。认为相对于来自地域社会外部的救助力量而言,地域力是一种蕴藏于社会内部的力量。主要包括地域资源蓄积力、地域自... 20世纪90年代末,以阪神淡路地震为契机,日本学界围绕着地域力与社会重建之关系展开了深度反思,形成了地域力研究的高潮。认为相对于来自地域社会外部的救助力量而言,地域力是一种蕴藏于社会内部的力量。主要包括地域资源蓄积力、地域自治力和民众对地域的关心力等要素,而其具体的构建过程则主要是通过地域社会"协动力"和"组织力"两方面加以展开的。对于深陷危机和灾难之中的社会来说,恢复、激活其地域力乃是其重建和振兴的关键。 展开更多
关键词 地域力 社会重建 阪神地震
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城乡经济地域力场中的动力结构分析
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作者 石忆邵 朱红燕 《上海城市规划》 2000年第1期2-5,共4页
本文认为在城乡经济地域力场中,存在着方向相反的两种力,即离心力和向心力,这两种力的相互作用产生了城乡经济地域运动中的集聚与扩散现象。其中向心力主要由城市优位吸引力、城市市场吸引力、城市文化多样性的吸引力、城市极化力、城... 本文认为在城乡经济地域力场中,存在着方向相反的两种力,即离心力和向心力,这两种力的相互作用产生了城乡经济地域运动中的集聚与扩散现象。其中向心力主要由城市优位吸引力、城市市场吸引力、城市文化多样性的吸引力、城市极化力、城市职业吸引力、乡村排斥力、政策导向力等分支力构成;离心力主要由城市辐射扩散力、城市产业转换扩散力、城市市场辐射力、城市职业外推力、乡村对城市的逆向辐射力等分支力构成。 展开更多
关键词 结构 向心 离心 城乡经济地域力
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农村社会工作与“地域抗逆力”培育--以日本过疏化对策下社会工作实践为中心 被引量:3
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作者 芦恒 苏博 《华东理工大学学报(社会科学版)》 CSSCI 北大核心 2021年第2期110-120,共11页
第二次世界大战后日本经济高速增长,同时带来“城乡分割”的乡村过疏化风险,导致人口减少和社会衰败的困境。此后日本农村社会工作实践可视为抵御过疏化风险、培育地域抗逆力的过程。“地域抗逆力”不同于“社区抗逆力”的独特之处在于... 第二次世界大战后日本经济高速增长,同时带来“城乡分割”的乡村过疏化风险,导致人口减少和社会衰败的困境。此后日本农村社会工作实践可视为抵御过疏化风险、培育地域抗逆力的过程。“地域抗逆力”不同于“社区抗逆力”的独特之处在于城乡一体化的发展性社会政策。而社会工作创新发展嵌入城乡一体化的发展性政策转型过程,先后从“地域社会自愈能力”和“地域社会自治能力”角度,加强了乡村公共福利服务和农民组织建设。对于同样处于农村空心化风险下,实现乡村振兴和城乡融合战略的中国而言,其重要启示在于,我们应加强社会工作与普惠性社会福利政策体系的一体化建设;加强社会工作的“抗逆性”思维和超越城乡的“地域性”认识;在注重内外联动性和对象精准性方面加强社会工作的整合性。 展开更多
关键词 过疏化对策 地域抗逆 乡村振兴
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基于地方文献云共享体系的安徽地域文化影响力建设研究
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作者 李祝启 毛丹 《合肥工业大学学报(社会科学版)》 2014年第2期131-134,共4页
文章通过对地方文献在安徽地域文化影响力建设中作用的分析,明确地方文献开发利用的重要性,并在此基础上指出安徽地方文献开发利用中存在的问题,最后从体系框架、地方文献数字资源库建设以及服务品牌创建等方面提出安徽地方文献云共享... 文章通过对地方文献在安徽地域文化影响力建设中作用的分析,明确地方文献开发利用的重要性,并在此基础上指出安徽地方文献开发利用中存在的问题,最后从体系框架、地方文献数字资源库建设以及服务品牌创建等方面提出安徽地方文献云共享体系构建及应用策略。 展开更多
关键词 地域文化影响 地方文献 云计算 安徽省
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试论新常态下地域文化领导力的创新和提升之路
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作者 郭益盈 《经济师》 2019年第8期16-17,19,共3页
当前新常态下文化建设的指导路线和方针,既在理论上延伸了地域文化领导力的新内涵,又在实践上赋予了其转型时期的时间和历史的伦理责任。文章以地域文化特征鲜明的典型城市成都为样本,论述了依托城市特质的战略定位和“互联网+”的结合... 当前新常态下文化建设的指导路线和方针,既在理论上延伸了地域文化领导力的新内涵,又在实践上赋予了其转型时期的时间和历史的伦理责任。文章以地域文化特征鲜明的典型城市成都为样本,论述了依托城市特质的战略定位和“互联网+”的结合才是提升和创新地域文化领导力管理模式的必由途径和根本保障。 展开更多
关键词 文化新常态 地域文化领导 大数据应用
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Geostress measurements near fault areas using borehole stress-relief method 被引量:5
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作者 黄明清 吴爱祥 +1 位作者 王贻明 韩斌 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3660-3665,共6页
To minimize negative effects of geostress distribution on mining safety near the fault areas, the UPM40 triaxial geostress testing system was introduced to conduct in-situ geostress measurements at three sites and nin... To minimize negative effects of geostress distribution on mining safety near the fault areas, the UPM40 triaxial geostress testing system was introduced to conduct in-situ geostress measurements at three sites and nine points by the borehole stress-relief method. The results of strain?confining pressure curves show that rock masses at the three measuring sites exhibit comprehensive linear elasticity in spite of various fissures or cracks within rocks. Horizontal and vertical stress components distribute discrepantly near the fault areas, and the maximum lateral pressure coefficient is as high as 6.15. The maximum principle stress ranges from 8.01 to 14.93 MPa, and stress directions are in the range of N78.07°W?N17.55°W. Geostresses near fault areas are dominated by the horizontal tectonic stresses, while the lower values, compared to those under similar geological conditions are due to stress release by the fault. Additionally, the fault and shear stress nearby are partially responsible for asymmetric elongation and southwesterly migration of orebodies. 展开更多
关键词 fault areas geostress distribution borehole stress-relief method lateral pressure coefficient horizontal tectonic stress
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Study of accent differences among regional varieties of English 被引量:1
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作者 吴承义 《Sino-US English Teaching》 2009年第1期5-9,共5页
The globalization and nativization processes of English resulted in the appearance of a large number of regional varieties of English. Concerning their accent between the single norm theory and the multiple norm diffe... The globalization and nativization processes of English resulted in the appearance of a large number of regional varieties of English. Concerning their accent between the single norm theory and the multiple norm differences, there has always been a debate theory. This paper argues against the 'standard-nonstandard' classification of English accents upheld by the former, and revises the concept of 'the three concentric circles of English' proposed by the latter, providing some helpful tips on the current instruction of listening and speaking in China's colleges and universities. 展开更多
关键词 English accents regional varieties instruction of listening instruction of speaking
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Approach to Delimiting Metropolitan Regions' Boundary and Grading Urban Hierarchy Within a Metropolitan Region——A Case Study of Shanghai Metropolitan Region 被引量:5
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作者 LUO Shougui Andrew JOHNSTON CHEN Dongchun 《Chinese Geographical Science》 SCIE CSCD 2008年第3期197-205,共9页
In metropolitan regions, the change in the strength of "flows" between a core city and surrounding cities re-flects the range of the core city's influence, while the gravity between core city and other c... In metropolitan regions, the change in the strength of "flows" between a core city and surrounding cities re-flects the range of the core city's influence, while the gravity between core city and other cities reflects the strength of potential relation between them. This article firstly attempts to delimit the boundary of metropolitan regions with the two dimensions measure combining "flows" and gravitation. The former is measured through the flow of people be-tween the core city and surrounding cities, and the latter is measured through both population and gross domestic products (GDP) of the core city and surrounding cities. The hierarchy of the cities within a metropolitan region is classified in order to emphasize the roles of the cities belonging to the metropolitan regions, different from the general way through population scale and administrative level, and is typical in China. This paper uses the Shanghai metropolitan region as a research case, determining boundary of this metropolitan region clearly and classifying hierarchy of the cities within the region. The final results are significantly different to previous work, even overthrowing the traditional system of urban hierarchy partly. It is helpful to highlight the function of cities in organizing the regional economy, the level structure of metropolitan regions, and each city's relative importance in a metropolitan region, which can be taken as scientific basis for planning integrated regions or urban systems. 展开更多
关键词 metropolitan regions boundary delimitation urban hierarchy SHANGHAI
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Transfer and Transformation of Soil Iron and Implications for Hydrogeomorpholocial Changes in Naoli River Catchment, Sanjiang Plain, Northeast China 被引量:8
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作者 JIANG Ming LU Xianguo +2 位作者 WANG Hongqing ZOU Yuanchun WU Haitao 《Chinese Geographical Science》 SCIE CSCD 2011年第2期149-158,共10页
Wetland soils are characterized by alternating redox process due to the fluctuation of waterlogged conditions. Iron is an important redox substance, and its transfer and transformation in the wetland ecosystem could b... Wetland soils are characterized by alternating redox process due to the fluctuation of waterlogged conditions. Iron is an important redox substance, and its transfer and transformation in the wetland ecosystem could be an effective indicator for the environment changes. In this paper, we selected the Naoli River catchment in the Sanjiang Plain, Northeast China as the study area to analyze the dynamics of transfer and transformation of soil iron, and the relationship between iron content change and environmental factors. The results show that the total and crystalline iron contents reach the peak in the depth of 60 cm in soil profile, while the amorphous iron content is higher in the topsoil. In the upper reaches, from the low to high landscape positions, the total and crystalline iron contents decrease from 62.98 g/kg to 41.61 g/kg, 22.82 g/kg to 10.53 g/kg respectively, while the amorphous iron content increases from 2.42 g/kg to 8.88 g/kg. Amorphous iron content has positive correlation with organic matter and soil water contents, while negative correlation with pH. Moreover, both the crystalline and amorphous iron contents present no correlation with total iron content, indicating that environmental factors play a more important role in the transfer and transformation of iron other than the content of the total iron. Different redoximorphic features were found along the soil profile due to the transfer and transformation of iron. E and B horizons of wetland soil in the study area have a matrix Chroma 2 or less, and all the soil types can meet the criteria of American hydric soil indicators except albic soil. 展开更多
关键词 wetland soil landscape position hydrogeomorpholocial condition redoximorphic feature IRON
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Relationship Between Producer Services Developing Level and Urban Hierarchy——A Case Study of Zhujiang River Delta 被引量:11
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作者 ZHONG Yun YAN Xiaopei 《Chinese Geographical Science》 SCIE CSCD 2008年第1期1-8,共8页
As the Central Place Theory indicates, the centricity of a central city can influence the extension of its ser- vice. Since the service industry in the theory is mostly consumer services, it is worth studying the rela... As the Central Place Theory indicates, the centricity of a central city can influence the extension of its ser- vice. Since the service industry in the theory is mostly consumer services, it is worth studying the relationship between the producer services and the centricity of the city in the service society with producer services becoming a more im- portant part of the service industry. The paper takes the case of the Zhujiang (Pearl) River Delta (PRD), a developed region in China, to study the relationship between the developing level of producer services and the urban hierarchy. Based on the analysis about the spatial difference of the producer services in the nine cities of the PRD, and the divi- sion of the nine cities according to some economic indices, it is shown that there is a correlation between the develop- ing level of producer services and the urban hierarchy. Furthermore, two deductions about the future status of the pro- ducer services in the city and the location of the producer services in a large region can be made from this correlation between the developing level of producer services and the urban hierarchy. 展开更多
关键词 producer services urban hierarchy CORRELATIVITY Zhujiang (Pearl) River Delta (PRD)
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JUNCTION BETWEEN GANJIANG FAULT AND TANLU FAULT AND ITS SIGNIFICANCE TO MINERALIZATION 被引量:2
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作者 CUIXuejun XIABin +3 位作者 ZENGZuoxun LIULilin CHENXiangyun YANGWeiran 《Geotectonica et Metallogenia》 2005年第1期1-12,共12页
The concept of fault junction is proposed to describe the relationship between the two faults by the authors. The junction relationship between Ganjiang and Tanlu faults is analyzed in this paper, and this has been el... The concept of fault junction is proposed to describe the relationship between the two faults by the authors. The junction relationship between Ganjiang and Tanlu faults is analyzed in this paper, and this has been elucidated through numerical simulation about the tectonic stress field analysis. Numerical simulation of the tectonic stress field conducted for the major mineralization stage of the Jiujiang-Ruichang junction area reveals that the stress field of the junction structure at the major mineralization stage shows a relatively close relationship with the formation of the ore deposits (occurrences). 展开更多
关键词 junction relationship numerical simulation Jiujiang-Ruichang junction area structural stress field MINERALIZATION
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Combination of Ecoprofile and Least-cost Model for Eco-network Planning 被引量:3
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作者 XIAO He LIU Yunhui +2 位作者 YU Zhenrong ZHANG Qian ZHANG Xin 《Chinese Geographical Science》 SCIE CSCD 2014年第1期113-125,共13页
The protecting requirements and functional connectivity of species in isolated habitat patches are crucial factors of eco-network planning.This study aimed to improve the method of eco-network planning for species con... The protecting requirements and functional connectivity of species in isolated habitat patches are crucial factors of eco-network planning.This study aimed to improve the method of eco-network planning for species conservation.Ecoprofiling was used to group the species by similar behavior types,namely,choice of ecosystem,area requirement,and short distance dispersal abilities.A least-cost model was used to simulate the optimal corridor location to maintain functional connectivity.A combination of ecoprofile and least-cost model was hired to develop an eco-network that promoted species conservation.A case study was also conducted in Beijing,China.In addition to the required ecosystem,habitat area is an important parameter for habitat extraction.Habitat area can remove noise habitat patches because of lacking area.Short-distance dispersal can be used to identify corridor requirements and avoid unnecessary building requirements.Species with various dispersal abilities exhibit significant differences in terms of corridor length and location requirement.Habitat isolation is the main threat for weakly mobile species,and habitat loss is the major risk of mobile species protection.Different species groups also exhibit distinct landscape pattern demands for an eco-network,and the eco-network planning based on specific species can not protect other species.We proposed that a combination of ecoprofile and least-cost model improved the efficiency of species conservation by eco-network planning. 展开更多
关键词 eco-network ecoprofile least-cost model biodiversity conservation BEIJING China
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The Effect of Static Stress Triggering of the M_S 7. 1 Yushu Earthquake
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作者 Song Jin Jiang Haikun 《Earthquake Research in China》 2012年第3期348-354,共7页
This paper calculates the static stress changes generated by the Yushu M_S 7. 1 earthquake in Qinghai Province. On the basis of regional stress,we take account of the static stress change triggered by the Yushu M_S 7.... This paper calculates the static stress changes generated by the Yushu M_S 7. 1 earthquake in Qinghai Province. On the basis of regional stress,we take account of the static stress change triggered by the Yushu M_S 7. 1 earthquake to find the optimally oriented fault planes,then calculate the Coulomb stress change on the optimally oriented fault plane. The results indicate that most of the aftershocks are triggered by the mainshock. The image of Coulomb stress changes is also in accord with regional earthquakes ( M_L ≥3. 0 ) distribution,but the value is lower than 0. 01MPa. In addition,this paper calculates the Coulomb stress changes in the case that the aftershock fault plane is the same as the main shock. Through comparison,we find that the image of Coulomb stress changes obtained using the "optimally oriented fault"approach is more consistent with the distribution of Yushu aftershocks and regional earthquakes. 展开更多
关键词 Ms7. 1 Yushu earthquake Coulomb stress changes Aftershock distribution Regional stress
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Late Cenozoic Tectonic Deformation in the Dongsha Islands and Adjacent Sea Area 被引量:6
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作者 吴时国 刘展 +3 位作者 王万银 郭军华 T.Lüdmann H.K.Wong 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2003年第4期377-388,共12页
Dongsha Island and the adjacent sea area locate at the northern continental margin of the South China Sea (SCS), and is connected to the east by the Manila Trench. Analyses of seismic stratigraphy and gravity, magneti... Dongsha Island and the adjacent sea area locate at the northern continental margin of the South China Sea (SCS), and is connected to the east by the Manila Trench. Analyses of seismic stratigraphy and gravity, magnetic and drilling wells data led to the discovery of three post fault sequences (V, VI, VII). Extensive tectonic uplift, magma activity and erosion occurred in Dongsha Island and the adjacent area, where most of the faults in the northeastern SCS were still active during Pliocene and Quaternary. Two groups of faults trending NEE and NW were developed during Late Cenozoic. We conclude that three important tectonic movements, especially Dongsha movement (4.4-5.2 Ma) and Liuhua movement (1.4-1.89 Ma), controlled the structural framework in the Dongsha rise; whose deformation in the east is stronger than that in the west and whose stress field variation suggests that the tectonic uplift in the study area contributed to magmato tectonic events correlated to the main collision phases between the East China and Taiwan 5-3 and 3-0 Ma ago. 展开更多
关键词 Late Cenozoic tectonic movement seismic stratigraphy plate collision South China Sea
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Research on the human resource development of the Three Gorges Region,China
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作者 Zhou Yinzhen Sun Dalin 《Ecological Economy》 2008年第3期319-327,共9页
The Three Gorgers' Region (TGR) is an economic region of China, and lies in the western part of Yangtze economic belt. It takes the Three Gorges Project as leading. Chongqing and Yichang City as main body, the Thre... The Three Gorgers' Region (TGR) is an economic region of China, and lies in the western part of Yangtze economic belt. It takes the Three Gorges Project as leading. Chongqing and Yichang City as main body, the Three Gorges Reservoir as ligament. It covers about 700 km of the Yangtze River valley from Chongqing to Yichang, including Chongqing City, Yichang City and Enshi District of Hubei Province. Since the construction of Three Gorges Project and establishment of Chongqing as municipality directly under the Central Government. the regional economy, culture, education, technology, etc., all developed harmoniously and rapidly, and the diathesis of the rgional human resources also got an exaltation. While compared with the eastern region of China. the economy, science and technology in this region still fall behind, and the current situation is of no optimism. Based on the theory of human resources development, this paper analyzes current situation and problems in the human resources development oJ the TGR, and puts forward the countermeasures such as planning human resources development program based on "anaphase support"policy,developing echucation and training husiness,reasonably organizing labor export,etc. 展开更多
关键词 Three Gorges Region (TGR) Human resource DEVELOPMENT
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The Relationship between Forestland Soil Fertility and Gathering Firewood in the Zhuxi Watershed in the Red Soil Hilly Region of China 被引量:1
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作者 CHEN Zhi-qiang CHEN Zhi-biao +1 位作者 CHEN Hai-bin YUE Hui 《Journal of Mountain Science》 SCIE CSCD 2013年第1期75-83,共9页
Declining soil fertility has become an increasingly urgent problem and gathering firewood is one of the important contributing factors.Due to the excessive exploitation of natural resources especially for firewood,the... Declining soil fertility has become an increasingly urgent problem and gathering firewood is one of the important contributing factors.Due to the excessive exploitation of natural resources especially for firewood,the red soil hilly region has become one of the most vulnerable eco-environment regions in China.The pressure of gathering firewood on forestland soil fertility in forestland has been generally estimated by geographical information system and questionnaire method in this paper in the Zhuxi watershed of Changting County,Fujian Province,China,a typical representative in the red soil hilly region of China.The results of this study show that:i) Forestland soil fertility is negatively affected by gathering firewood,which is more intensive in the integrated buffer zone than out of zone.The forestland soil fertility grade,OM,total N,available N,total P,available P,total K,available K,pH and &lt;2μm clay content are lower and bulk density is higher in the integrated buffer zone than those out.ii) The forestland soil fertility grade,OM,total N,available N,total P,available P,total K,available K,pH and &lt;2μm clay content tend to be lower and bulk density tends to be higher in the village buffer zones than those out in Datian,Chenguang and Youfang respectively.iii) The population density,economic development and terrain might be the key driving forces contributing to the relationship between gathering firewood and forestland soil fertility.Higher population density leads to more massive firewood collection and imposes more pressure on forestland soil fertility.Decreasing the use of firewood stove may reduce firewood consumption and thus release the pressure of gathering firewood on forestland soil fertility.Terrain affects the accessibility to gathering firewood thus affects forestland soil fertility.Other driving forces influencing the relationship between gathering firewood and forestland soil fertility should also be taken into account in the further study. 展开更多
关键词 Gathering firewood Soil fertility Questionnaire method GIS Zhuxi watershed
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DEEP TECTONOTHERMAL MECHANISM FOR THE TECTONIC EXTENSION OF THE EASTERN ASIAN CONTINENTAL MARGIN
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作者 ZHANG Jian and SHI Yaolin(Laboratory of Computational Geodynamics, Graduate School of the Chinese Academy of Sciences,Beijing 100039, China) 《Geotectonica et Metallogenia》 2003年第1期156-164,共9页
The continental marginal extension concept developed by Chinese geologists recently may be applied to the explanation about the Cenozoic extension and divergent movement of the Eastern Asian continental margin. From t... The continental marginal extension concept developed by Chinese geologists recently may be applied to the explanation about the Cenozoic extension and divergent movement of the Eastern Asian continental margin. From the viewpoint of continental marginal extension, this paper discusses the deep tectonothermal mechanism of the tectonic extension of the Eastern Asian continental margin.The Eastern Asian continental margin is an extensional belt with intensive magmatism and structural deformation, geophysically characterized by continual earthquakes and obvious geothermal anomaly.Seismic tomographical results about the Eastern Asian continental margin imply that the Pacific Plate is subducted toward the Eurasian Plate at a low angle and the diving Pacific Plate lies on the surface of the 670-km phase transitional zone. We interpret this feature to be resulted from retrogressive subduction followed by continental marginal extension. Our thermal modeling and geodynamical computation results suggest that the retrogressive subduction occurred at about 76Ma and the withdrawal of the trench served to supply the volume for the continental growth, which led to the formation of the growing front of the Eastern Asian continental margin. The growth width of the Eastern Asian continental margin is about 700 km. 展开更多
关键词 the Eastern Asian continental margin tectonothermal modeling retrogressive subduction continental marginal growth
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The Study on Apparent Stress before and after the Minxian M_S6.6 Earthquake on July 22,2013
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作者 Chen Lijuan Li Yan'e +3 位作者 Yang Liming Chen Jifeng Chen Xuezhong Gong Liwen 《Earthquake Research in China》 CSCD 2016年第2期193-207,共15页
Based on the waveform data observed by the regional seismic network of Gansu Province,we calculated the apparent stress of 422 earthquakes with M_L≥ 2. 0 occurring in the surrounding area of the Minxian earthquake fr... Based on the waveform data observed by the regional seismic network of Gansu Province,we calculated the apparent stress of 422 earthquakes with M_L≥ 2. 0 occurring in the surrounding area of the Minxian earthquake from January 2010 to July 2014 and obtained the temporal and spatial variation of apparent stress before and after the Minxian earthquake. Results show that( 1) the high value of apparent stress of earthquakes with M_L≥4. 0 was concentrated in the epicenter area before the Minxian earthquake while that of earthquakes with M_L< 4. 0 was not;( 2) Apparent stress around the epicenter area showed an obvious increasing process before the Minxian earthquake and the increasing process has continued after the main shock,which means that this study area is still in the danger of strong earthquakes. 展开更多
关键词 The 2013 Minxian Ms6. 6 earthquake Apparent stress Temporal and spatialvariation
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Land Use Change and Anthropogenic Driving Forces:A Case Study in Yanhe River Basin 被引量:18
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作者 SU Changhong FU Bojie +4 位作者 LU Yihe LU Nan ZENG Yuan HE Anna Halina LAMPARSKI 《Chinese Geographical Science》 SCIE CSCD 2011年第5期587-599,共13页
Human activities alter land use patterns and affect landscape sustainability. It is therefore very important to investigate the relationship between land use change and human activities. This study focuses on the dete... Human activities alter land use patterns and affect landscape sustainability. It is therefore very important to investigate the relationship between land use change and human activities. This study focuses on the detection of changing land use patterns in the Yanhe River Basin in northern Loess Plateau of China between 1995 and 2008. Landscape metrics were used to analyze the changing land use patterns and to explore the related anthropogenic driving forces. Results show that:1) Totally, 186 590 ha of croplands were converted into alternate land-use types (equivalent to 61.7% of the original cropland area). The majority of cropland areas were found to be converted into grassland and woodland areas (accounting for 55.9% and 4.9% respectively of the original cropland areas). 2) Both cropland and woodland demonstrated an increasing fragmentation tendency while grasslands showed a decreasing fragmentation tendency. 3) Multiple driving forces of land use change were thought to act together to changes in landscape metrics in the Yanhe River Basin. The anthropogenic driving forces were analyzed from four perspectives:ecological conservation policy, labor force transfer, industrial development, and rural settlement. The policy of the GfG (Grain for Green) project was the main driving factor which expedited the conversion from cropland to woodland and grassland. Industrial development was also found to affect land use change through the direct impact of economic activities such as oil exploration and agricultural production, or through indirect impacts such as the industrial structures readjustment. Labor force transfer from rural to urban areas was found to follow the industrial structure readjustment and further drove land use change from cropland to off-farm land use. Establishment of new tile-roofed houses instead of cave-type dwellings in rural settlements has helped to aggregate the original scattered land-use type of construction. 展开更多
关键词 land use landscape metrics anthropogenic driving force Grain for Green (GfG) policy Yanhe River Basin
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Hydrodynamic processes and depositional styles of glacierassociated deposits in the Moxi basin, Southwest China 被引量:1
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作者 TIE Yong-bo FENG Xing-lei +1 位作者 RAN Jing XU Wei 《Journal of Mountain Science》 SCIE CSCD 2016年第3期557-568,共12页
This study aims to understand the particle size distribution and depositional styles of glacierassociated deposits in the Moxi basin in southwest China. Based on field surveys, 28 samples from glacier-associated depos... This study aims to understand the particle size distribution and depositional styles of glacierassociated deposits in the Moxi basin in southwest China. Based on field surveys, 28 samples from glacier-associated deposits(including glacial till,fluvioglacial, debris flow, river and lake deposits)were collected and tested in the laboratory. The results showed that the glacier-associated deposits can be differentiated based on particle gradation,particle size distribution and accumulated percentages. We evaluated the evolution of a former dammed lake in the Moxi basin based on glacierassociated deposits. The results of this study also indicated that the Moxi Platform was not formed by a single depositional process but is composed of both fluvioglacial and debris flow deposits. This research shows that the depositional style analysis is useful in identifying different glacier-associated deposits in high mountain regions. Moreover, the evaluation of the differences in particle sizes of the glacierassociated deposits is useful in reconstructing geohazard events in periglacial regions, and this information can help in identifying and reducing the potential risks associated with geo-hazards. 展开更多
关键词 Glacial fluvial deposits Dynamic difference Geohazard High mountain region Moxi basin
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