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地下水资源进行准确评价与科学管理是人类对地下水资源进行有效开发利用的前提和基础,当今世界面临的"人口、资源、环境"三大问题,都直接或间接地与地下水有关。本文阐述了原苏联、美国、欧共体和我国地下水资源评价与管理的现状,对水资源管理和保护发展趋势进行了展望。 相似文献
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本文对乌海市域内的土地资源、气候资源、水资源、生物资源和矿产资源进行了概述,并对其进行了评价,进而提出了一些开发、利用、保护农业经济资源的战略思考. 相似文献
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本文是一项跨学科、综合性的研究,其论述涉及了地理学、经济学、管理学等相关领域,运用了系统论、信息论及地理信息系统等有关原理和方法,尝试建立区域发展调控的理论体系。全文共分六章,第一章论述了国外区域发展调控(干预)的由来和发展,并对有关理论进行评述,深入分析了我国在区域发展和调控方面的历史、现状及问题,提出了我国在向社会主义市场经济体制转轨时期进行区域调控的必要性;第二章着重对我国各不同时期区域调控的机理进行深入分析,并特别研究了转轨时期区域调控的机理和体系结构;第三章至第六章则分别就区域规划、区域政策、法制建设及关系进行论述,并在总结了国内外经验教训基础上,提出了各种调控手段在当前和今后向市场经济体制转轨时期的应用设想。 相似文献
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<正>不久前,赤峰市土地整治中心主任李云涛一行对全市12个旗、县、区的在建整治项目进行了督查,督查过程中,对项目的施工进度、施工质量、内业资料等进行了详细的检查。其中,对项目施工过程中亟须解决的难题给予了现场解答,并对项目施工进度和质量进行了重点检查。对于施工进度快、质量好的项目给予了肯定和表扬,并争取保质保量完成项目验收。 相似文献
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基于土壤水动力学原理,建立了内陆河流域山前农田绿洲SPAC系统土壤水分运移的子模型。应用该模型对土壤剖面含水率、农田棵间蒸发和叶面蒸腾量进行了模拟研究,并以实测值进行了验证。对相同种植与田间管理条件下的春小麦生长季田间土壤水分、土壤蒸发和叶面蒸腾量进行了预报,得到了较满意的结果。对模型主要参数土壤饱和导水率Ks、土表排水系数Wmax、净辐射Rn、风速Uz、饱和差D、作物叶面指数LAI进行了敏感性分析,得出这些参数对土壤水分运移的影响显著。应用该模型对西北干旱区内陆河流域山前绿洲灌溉农田的土壤水分均衡和作物根系吸水规律以及SPAC系统中土壤水分运移规律进行了模拟研究。 相似文献
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遥感技术在黑竹沟风景旅游资源调查分类与评价中的应用 总被引：2，自引：1，他引：1
随着信息技术的发展,遥感成为了旅游资源调查评价的新手段。阐述了运用遥感新技术对四川省乐山市黑竹沟风景旅游区旅游资源进行调查的过程,并结合现场调研和相关资料对其旅游资源进行了分类和评价。首先对黑竹沟风景旅游区2003年的ETM影像数据遥感图像进行了处理,然后建立了解译标志进行旅游资源信息的提取和分析,最后对黑竹沟风景旅游区的旅游资源进行了客观全面的分类和评价。黑竹沟的旅游资源可分为2大类、7亚类、21个基本类型,是一处景源内容丰富、景象多变的旅游区,发展潜力巨大。 相似文献
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福建省崩岗侵蚀与治理模式探讨 总被引：28，自引：0，他引：28
根据野外调查和定点径流泥沙资料,对福建省崩岗分布特征、内在物质基础、侵蚀动力机制、产沙模数等进行了探讨,提出了崩岗治理模式,并就典型实例进行了分析。 相似文献
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新文化地理学中的非表征与再物质化研究进展 总被引：6，自引：2，他引：4
文化地理学以往对表征和话语的过度重视,引起了部分学者对“非表征”和“再物质化”的思考,呼吁关注日常生活中即时的、动态和无法被表征捕捉的实践和情绪,并重视物质实体的展演性、流动性、情绪塑造和符号交换的意义,引发和促进了新文化地理学对于情感、身体、实践、展演和日常生活等议题的关注。论文对“非表征”和“再物质化”的概念和核心理论进行了梳理,并对“身份、认同及空间的构建”“情感与空间氛围”“身体与展演及意义”以及“权力与网络”4个相关议题进行了讨论,以期促进国内文化地理学对感知的、即时的和物质性的空间要素进行关注,并对新文化地理研究方法进行创新。 相似文献
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MT and reflection: an essential combination 总被引：3，自引：0，他引：3
Alan G. Jones 《Geophysical Journal International》1987,89(1):7-18
Summary. At many localities in the world there have been coincident comprehensive electromagnetic (EM) studies and seismic reflection profiles conducted. Unfortunately, over many more regions the seismic reflection images are interpreted without the constraints afforded by electrical conductivity information. This paper is an attempt to convince the reader that a collocated magnetotelluric (MT) study should, in almost every case, be made wherever a seismic reflection survey is undertaken. Examples are shown from six studies in which the EM results aided the geological/tectonic interpretations of the seismic sections.
Also, difficulties with the MT technique are discussed, and the interpretations of conducting zones within the lower crust are examined. Finally, a generalised model is proposed for the continental crust that may account for both the reflectivity and conductivity of the zone at the top of the lower crust. 相似文献
Also, difficulties with the MT technique are discussed, and the interpretations of conducting zones within the lower crust are examined. Finally, a generalised model is proposed for the continental crust that may account for both the reflectivity and conductivity of the zone at the top of the lower crust. 相似文献
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Fincher R 《The Australian geographer》1998,29(1):31-47
"I focus on urban environments and on immigration as that segment of population growth often viewed as having certain effects on cities. The paper argues for a reframing of narratives linking population and urban environments, so that both immigrant-led population growth and the condition of urban environments in Australia can be understood as the product of the political and economic interpretations being made of the nation's internationalisation, which in turn has consequences for diversity amongst places and peoples." 相似文献
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G. Atkinson 《The Australian geographer》1987,18(2):124-136
The Nepean River terraces are a sequence of Tertiary and Quaternary alluvial deposits to the west of Sydney, NSW. In the last 85 years over 20 soil and geological maps covering the area have been produced. Errors and interpretations introduced in early regional scale maps were perpetuated for over 40 years despite numerous new editions. Regional scale geological maps in the 1950s and 1960s failed to take account of good detailed work by geographers, soil surveyors and geology students. Detailed geological and soil stratigraphic mapping in the past 10 years drew attention to these problems and has highlighted the important contributions made by the earlier detailed studies. New interpretations can now be tested against a substantial body of data. Contemporary regional soil and geological maps have taken account of these detailed studies and so present a more consistent approach than in the past. 相似文献
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In this article, we analyze the production of inequalities within the centralized water supply network of Lilongwe. We use a process-based analysis to understand how urban infrastructure is made to work and explain the disparity in levels of service by tracing the everyday practices of those who operate the infrastructure. This extends existing analyses of everyday practices in relation to urban water inequalities in African cities by focusing on formal operators, rather than water users, and looking within the networked system, rather than outside it. Our findings show that these practices work to exacerbate existing water stress in poor areas of the city. We conclude with a reflection on how understanding these practices as the product of the perceptions, rationalizations, and interpretations of utility staff who seek to manage the city’s (limited) water as best they can offers insight into what is required for a more progressive urban water politics. 相似文献
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《Norsk geografisk tidsskrift. Norwegian journal of geography》2012,66(1):11-22
Madagascar has been highlighted as a hotspot for biodiversity because of its unique natural history and a high level of endemism. This heritage of biodiversity is believed to be at serious risk, due to deforestation caused by local people. This paper concerns the landscape of the Madagascar highlands, and how interpretations of them have changed the past century. A social constructivist approach reveals two opposing views about the vegetation cover and seeks to unfold which specific scientific paradigms, narratives or received wisdom they are based on. Most important are changing paradigms in ecology, from classic equilibrium ecology to non‐equilibrium ecology, and changes in social sciences from a structural to an interactionist approach. Another important aspect addressed in the paper is the impact of the re‐interpretations on environmental policy and management. The Ambohitantely Special Reserve is used as a case to illustrate how interpretations of forest history are influenced by the hegemonic discourse. 相似文献
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In human geography, member checking is now routine practice for upholding rigour in qualitative studies, yet it can result in conflicting opinions regarding research interpretations. Here we reflect upon divergent outcomes from member checking research exploring the nature of student experiences in a specific space of a Canadian university law school. While member checking did not yield acceptance of the initial interpretations by all informants, we argue that rather than invalidating our findings, the very disagreement exposed through member checks added to our analyses in important ways. As such, results refuted by informants should not necessarily be discarded in human geography research. 相似文献
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《Urban geography》2013,34(3):191-202
This paper outlines a framework for the analysis of the provision of public services in urban areas: the public city. Two interwoven concepts are discussed. The first of these relates to the nature of space. A brief review suggests that philosophical disputes overlook the explicit organization of space within jurisdictional units, a key factor in the provision of consumption goods. These areas, which can be identified as local state units, can be rationalized in various ways: neoclassical, liberal, and materialist interpretations have been identified within the literature. This paper argues that the local state cannot be discussed simply within the context of capitalist social relations, and that more detailed interpretations, incorporating concepts such as civil society, are necessary in order to understand the broad range of political activities associated with public provision. 相似文献
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The stratigraphic importance of fossils is never more apparent than in attempts to unravel the complexities of metamorphic terrains. The age and stratigraphic relationships of the thick metasedimentary and metavolcanic succession of Prins Karls Forland, western Svalbard, have been the subject of investigation and debate since the early part of this century (Hoel 1914; Craig 1916; Tyrrel 1924), and sharply different interpretations have been proposed (e.g. Harland et al. 1979; Hjelle et al. 1979). Until now, such interpretations have been unconstrained by palaeontological data, an understandable consequence of the metamorphic alteration undergone by these rocks. In this paper, we report the discovery of stratigraphically useful microfossils preserved in chert nodules from carbonaceous, dolomitic shales on northern Prins Karls Forland. These fossils have significant implications for the stratigraphic and structural interpretation of Forland metasediments, as well as for the more general problem of palaeontological prospecting in severely deformed and metamorphosed terrains, including those characteristic of the Archean Eon. 相似文献
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Power relationships structure discourse and its influence on policy and rural land use planning, but little research has examined how this might be observed in the dynamics of rural landscape transition. In a qualitative case study of the Ovens catchment, Victoria, Australia, discursive power is observed through sites of tension between informant interpretations of past, present, and future landscapes and contemporary local decision making. Three main tensions and an observation emerged that suggest discourse and power can be observed through the transfer and support of social memory narratives. We conclude that the identification of tensions between stakeholder perceptions of the past, present, and future of their landscape; awareness of the influence of those interpretations on current decision making; and attention to social memory narratives can provide invaluable insights for those seeking to understand local relationships of power. 相似文献
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