"VALUING THE TROPICS": DISCOURSES OF DEVELOPMENT IN THE FARM AND FOREST SECTORS OF FRENCH INDOCHINA, circa 1900–40     

Mark Cleary 《Singapore journal of tropical geography》2005,26(3):359-374

The paper examines how land and forest management policies were elaborated in French Indochina circa 1900–40. It places their development in the context of a scientific and economic discourse about the value of land and forest resources, the most appropriate ways in which they might be exploited and the relationship between colonial science and indigenous knowledge. By focusing on debates and laws relating to the development of small‐scale and plantation farming systems (Land Code legislations) and forest management and exploitation (Forest Code legislations) the paper seeks to ground arguments about Western conceptions of the “tropics” within a discussion of national policy development and impacts. Focusing primarily on Cochinchina and Annam (southern and central Vietnam) and drawing on materials from French archives, the paper shows how changes in both attitudes and legislation have had lasting consequences on systems of property rights in forest management and on the place and status of indigenous peoples in Indochina.  相似文献   

THE U.S. MILITARY AS GEOGRAPHICAL AGENT: THE CASE OF COLD WAR ALASKA*     

LAUREL J. HUMMEL 《Geographical review》2005,95(1):47-72

ABSTRACT. Alaska was strategically key to the U.S. defense plan during the cold war (1946–1989). As such, it was the scene of an enormous and sustained military investment, the effect of which was amplified by Alaska's undiversified economy, sparse development, small resident population, and marginalized political status at the beginning of the era. The strong military presence affected Alaskan demographics, economic development, and infrastructure and figured prominently in the admission of Alaska to the union in 1959. The high profile and long‐term presence of the U.S. military had such a dramatic affect on the course of Alaska that the result was tantamount to a “militarized landscape.”  相似文献   

Traces of the secondary Geography curriculum     

Lex Chalmers 《New Zealand geographer》2005,61(2):148-157

Abstract: Expressions of dissatisfaction about the post‐compulsory Geography curriculum in the early 1970s were unusually concerted, leading to the creation of a National Geography Curriculum Committee. This essay reviews this history and the resulting Syllabus for Schools: Geography Forms 5–7 as a prelude to a discussion of contemporary curriculum development. The essay argues that curriculum development from 1975 and the ‘education reforms’ of the late 1980s failed to produce conditions in which satisfactory outcomes for a Geography curriculum can be assured in 2005, and that a new and concerted period of participation in curriculum discussion is required. Some goals for this process are outlined in the final section of the paper.  相似文献   

Analysis of village accessibility and its impact on land use dynamics in a mountainous province of northern Vietnam   总被引：5，自引：0，他引：5  

Jean-Christophe Castella  Pham Hung Manh  Suan Pheng Kam  Lorena Villano  Nathalie Rachel Tronche   《Applied geography (Sevenoaks, England)》2005,25(4):308-326

Surveys carried out in mountainous areas of northern Vietnam at research sites selected across a gradient of market integration, revealed strong relationships between the location of the village with respect to the national road network and the nature of its land-use systems, its poverty level and more generally its potential for development. We developed and tested in Bac Kan province a method to give an objective and quantitative definition of accessibility over a large geographic area. Accessibility maps integrated in a provincial GIS showed that despite recent improvements to the road network, some remote areas do not benefit from recent development.  相似文献   

Interpretation of radon anomalies in seismotectonic and tectonic-gravitational settings: the south-eastern Crati graben (Northern Calabria, Italy)   总被引：1，自引：0，他引：1  

C. Tansi  A. Tallarico  G. Iovine  M. Folino Gallo  G. Falcone   《Tectonophysics》2005,396(3-4):181-193

The study area is located in the south-eastern part of the Crati valley (Northern Calabria, Italy), which is a graben bordered by N–S trending normal faults and crossed by NW–SE normal left-lateral faults. Numerous severe crustal earthquakes have affected the area in historical time. Present-day seismic activity is mainly related to the N–S faults located along the eastern border of the graben. In this area, much seismically induced deep-seated deformation has also been recognised.In the present paper, radon concentrations in soil gas have been measured and compared with (a) lithology, (b) Quaternary faults, (c) historical and instrumental seismicity, and (d) deep-seated deformation.The results highlight the following:

(a) There is no evidence of a strong correlation between lithology and the radon anomalies.

(b) A clear correlation between the N–S geometry of radon anomalies and the orientation of main fault systems has been recognised, except in the southernmost part of the area, where the radon concentrations are strongly affected by the superposition of the N–S and the NW–SE fault systems.

(c) Epicentral zones of instrumental and historical earthquakes correspond to the highest values of radon concentrations, probably indicating recent activated fault segments. In particular, high radon values occur in the zones struck by earthquakes in 1835, 1854, and 1870.

(d) Deep-seated gravitational deformation generally coincides with zones characterised by low radon concentrations.

In the studied area, the anisotropic distribution of radon concentrations is congruent with the presence of neotectonic features and deep-seated gravitational phenomena. The method used in this study could profitably contribute towards either seismic risk or deep-seated gravitational deformation analyses.  相似文献   

惰性气体法测定地下水入渗补给量     

王凤林  毛绪美  程胜高  刘存富 《地球学报》2005,26(Z1):283-285

地下水入渗补给量是重要的水文地质参数。本文介绍了测定地下水入渗补给量的最新方法——惰性气体法的原理与方法，该方法适用于封闭条件下的深层地下水。  相似文献   

南水北调中线水源工程丹江口水库坍岸问题浅析   总被引：2，自引：0，他引：2  

黄振伟  李云安  黄胜华 《地质科技情报》2005,24(Z1):156-159

南水北调中线水源工程大坝加高后,丹江口库区内的部分库段在库水作用下易发生坍岸问题.为了预测水库坍岸范围和发生坍岸的难易程度,对丹江口水库的地形、地质条件和坍岸的影响因素和型式进行了分析.在此基础上,通过大量的调查,采取工程地质类比法预测了坍岸范围和难易程度,为对坍岸范围内的对象采取针对性的处理措施提供了地质依据.  相似文献   

利用地震属性研究准噶尔盆地西北缘拐19井区下侏罗统三工河组沉积环境   总被引：6，自引：0，他引：6       下载免费PDF全文

王世瑞  彭苏萍  凌云  王晓平  吴琳 《古地理学报》2005,7(2):169-184

在准噶尔盆地西北缘，寻找岩性圈闭油气藏已是至关重要的问题。但人们几乎还是用常规的手段来寻找岩性油气藏，没有实质性进展。本文是以利用宽方位角采集的地震数据为基础，对数据进行高保真资料处理和参考标准层的层拉平解释。利用前人的区域地质研究成果和钻井解释成果对侏罗系的沉积环境进行了精细的描述，确定了拐19井区在下侏罗统三工河组的出油层段附近的沉积环境由湖泊相－三角洲前缘相－河流相－湖泊相的演化过程。利用地震属性解释的结果也能较好地反映目标区的沉积环境变迁，并且与区域地质、测井解释结果相吻合，为寻找油气提供了很好的依据。由此得出利用地震属性可以进行沉积环境变迁分析，为油田寻找岩性圈闭及油气藏做出贡献。  相似文献   

准噶尔盆地腹部白垩系清水河组清一段高分辨率层序地层特征及岩性油气藏预测   总被引：1，自引：0，他引：1  

斯春松  王海东唐勇  沈金龙徐洋 《华东地质学院学报》2005,28(4):329-333

通过钻井、岩芯和测井等资料的分析，清水河组清一段划分出1个长期基准面旋回、2个中期基准面旋回和5个短期基准面旋回。MSC1中期基准面旋回主要为辫状河三角洲沉积，MSC2中期基准面旋回为湖泊相沉积，局部地区夹有辫状三角洲沉积，极易形成岩性油气藏。区域性隔层发育在非对称型长期基准面旋回的上部，有利的储集体主要分布于中期基准面上升的早期。  相似文献   

地质遗迹旅游的可持续发展   总被引：3，自引：0，他引：3  

高亚峰 《城市地质》2005,17(2):30-33

从介绍地质遗迹及地质遗迹旅游的概念入手，着重就新时期地质遗迹旅游可持续发展的问题，提出了两种思路和相应的策略。  相似文献