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1.
Abstract

The loss of agricultural land and its implications have been of great concern in the last decade. By undertaking a spatial analysis of the appropriation of agricultural land for urban use with an overlay of population and urban data, a focus on the consequences of certain regulations on the dynamics of land-use change is explored. This is achieved by integration of data inventories of agricultural land use for Portugal, and linking this information with CORINE Land Cover data as to assess change in the Algarve. An integrated assessment of agricultural land loss follows, undermined by the consequences of urban sprawl. In this sense, this paper expands on the currently existing decrees which provide support to sustainable development in the region while providing a qualitative assessment of future roles based on ethical values and economic efficiency and offering a feasible framework for policy-makers regarding the trends of urban/agricultural dichotomy in a planning and decision-making context.  相似文献   

2.
Growing evidence of global climate change has led to global concerns over the vulnerability of agriculture to drought. Located in a semiarid environment, southern Alberta has suffered significant losses of agricultural productivity due to drought hazards in recent decades. Understanding the relationship between crop production and drought conditions is essential for coping with increasingly uncertain climate conditions. This study attempts to quantify the magnitude of crop production vulnerability to drought in southern Alberta. The standard precipitation index is used to measure drought stress in the region. The empirical results provide a detailed picture of the spatial variation in crop production vulnerability to varying drought conditions. Vulnerability maps from this study reveal that pockets in the study area may experience significant productivity loss given the existing level of adaptive capacity. While the irrigation districts have been associated with a lower level of vulnerability than dryland outside the irrigated region, uncertain water supply under varying climatic conditions coupled with increasing water allocation for non‐agricultural uses may increase the vulnerability in these districts.  相似文献   

3.
Abstract

This special issue addresses the influences of planning cultures and histories on the evolution of planning systems and spatial development. As well as providing an international comparative perspective on these issues, the collection of articles also engages in a search for new conceptual frameworks and alternative points of view to better understand and explain these differences. The articles focus on three main aspects: the change in planning systems and its impact on spatial development patterns; the interrelationship between planning cultures and histories from a path-dependency perspective; and the variations in physical development patterns resulting from different planning cultures and histories. Papers from different parts of the European continent present evidence at different scales to illustrate these aspects. In all cases, the specific combinations of political, ideological, social, economic and technological factors are important in determining urban and regional planning trajectories as well as spatial development patterns.  相似文献   

4.
Abstract

The article examines the role of housing cooperatives for social cohesion in the city by introducing linking social capital which grasps the vertical dimension of social capital. Housing cooperatives represent a crucial intermediate level between residents and urban housing policy, thus providing opportunity structures for bottom-linked citizen participation. Drawing on the case of Vienna, a large-scale household survey and interviews with key informants provide empirical evidence on the importance of a form of social capital which links actors at different levels in the spatial hierarchy: residents, housing managers and political decision-makers. The findings add to our understanding of the opportunities and problems with resident participation in a policy field structured by multi-level governance. Our two-level analysis shows that the dominant model of governance, top-down as well as neoliberal, has structurally limited the room for participatory practices in cooperative housing. Nevertheless, we argue that professional housing cooperatives have a potential to give residents a voice beyond the neighbourhood. Their strong linkages with public decision-makers at different scales can help leverage ideas and resources of residents.  相似文献   

5.
The Analysis of Spatial Association by Use of Distance Statistics   总被引:20,自引:0,他引:20  
Introduced in this paper is a family of statistics, G, that can be used as a measure of spatial association in a number of circumstances. The basic statistic is derived, its properties are identified, and its advantages explained. Several of the G statistics make it possible to evaluate the spatial association of a variable within a specified distance of a single point. A comparison is made between a general G statistic and Moran's I for similar hypothetical and empirical conditions. The empirical work includes studies of sudden infant death syndrome by county in North Carolina and dwelling unit prices in metropolitan San Diego by zip-code districts. Results indicate that G statistics should be used in conjunction with I in order to identify characteristics of patterns not revealed by the I statistic alone and, specifically, the Gi and Gi* statistics enable us to detect local “pockets” of dependence that may not show up when using global statistics.  相似文献   

6.
This article discusses how standard spatial autoregressive models and their estimation can be extended to accommodate geographically hierarchical data structures. Whereas standard spatial econometric models normally operate at a single geographical scale, many geographical data sets are hierarchical in nature—for example, information about houses nested into data about the census tracts in which those houses are found. Here we outline four model specifications by combining different formulations of the spatial weight matrix W and of ways of modeling regional effects. These are (1) groupwise W and fixed regional effects; (2) groupwise W and random regional effects; (3) proximity‐based W and fixed regional effects; and (4) proximity‐based W and random regional effects. We discuss each of these model specifications and their associated estimation methods, giving particular attention to the fourth. We describe this as a hierarchical spatial autoregressive model. We view it as having the most potential to extend spatial econometrics to accommodate geographically hierarchical data structures and as offering the greatest coming together of spatial econometric and multilevel modeling approaches. Subsequently, we provide Bayesian Markov Chain Monte Carlo algorithms for implementing the model. We demonstrate its application using a two‐level land price data set where land parcels nest into districts in Beijing, China, finding significant spatial dependence at both the land parcel level and the district level.  相似文献   

7.
Abstract

Drawing on the case of the Wageningse Eng in the Netherlands, this paper considers the role of “storytelling” within spatial planning practices. It moves away, though, from seeing it as merely a model of spatial planning, where “storytelling” is sometimes used to justify planners' ideals for the landscape, or a model for spatial planning, which pushes for a normative use of “storytelling” as a means of encapsulating local knowledge and the views of those who live in, and use, the landscape. Rather, the paper engages “storytelling” as a method for revealing how formal planning practices may be destabilized by more vernacular narratives seeking to subvert dominant discourses and processes. In doing so, it seeks to not only show the contested nature of participatory planning within the Netherlands, but also the ways in which narratives—as revealed via such a method—construct specific positionalities with real implications for notions of inclusivity within planning practices.  相似文献   

8.
1955年底1956年初,在"四十条"所描绘的远景吸引下,许多农民抱着过高预期纷纷加入了高级社,这是农业合作化高潮形成的原因之一.由于预期加入高级社后收入可以大幅增加,许多农民不愿再从事原先对其具有吸引力的非农职业,有些农民也不愿从事副业生产.这一方面说明,许多农民加入高级社的确是自愿的,但是另一方面也意味着,许多农民的自愿是建立在不尽现实的过高预期之上的,带有很大的虚假性和盲目性.  相似文献   

9.
ABSTRACT

The agricultural systems of the Hawaiian archipelago were some of the most intensive in the Pacific and this scale of intensity is well illustrated by the large agricultural landscapes of leeward Hawai‘i Island. Previous research in the area has centred on understanding the relationship between agriculture, political process, and large-scale environmental conditions. Much of this research has been oriented at the regional level, privileging discussion of elite management and oversight, with only limited investigation exploring farmer-centric adaptation at local scales. In this paper, we assess the integration of local and regional processes in Hawaiian agriculture using recent paired archaeological and ecological data from the Ka‘ū Field System as a case study. We demonstrate the presence of both general patterns previously identified in the archipelago and particular adaptations to the local environment of Kahuku ahupua‘a. In particular, we highlight targeted infrastructural developments that allowed for cultivation of what would otherwise be a difficult cultivation medium within the confines of a larger, likely regionally organised, field system constrained by general soil biogeochemical thresholds. We argue that such investigations provide an increased understanding on how these large-scale agricultural landscapes were formed by integration at multiple social and spatial scales.  相似文献   

10.
Abstract

European spatial planning arguments advocate a blend of strategic thinking, coordination and related initiatives to promote and secure territorial cohesion. These ambitions embrace a set of normative agendas around economic, social and environmental convergence, competitiveness, policy coordination and efficient infrastructure provision across space. In practice, territorial management then involves devising interventions across inter-connecting scales of governance which comprise complex agency relations, differentiated places and defined communities. In transnational contexts, attempts to foster appropriate spatial governance arrangements and relations across sovereign borders necessitate re-crafting planning and development cultures and service delivery practices to advance territorial cohesion. Transnational working necessarily involves cooperation across an extended range of institutions, interests, influences and potential actors. This paper examines attempts to secure bi-lateral commitment to a joint planning framework for the two distinct territories on the island of Ireland. Specifically, it traces the formal and informal activities involved in the development of the 2013 Framework for Cooperation between the Republic of Ireland and Northern Ireland. Informed by ideas of cross-border regionalism, it discusses the necessary spatial public diplomacy involved in the social reconstruction of strategic spatial planning to improve policy coordination and cross-border working.  相似文献   

11.
The rank adjacency statistic D is a statistical method for assessing spatial autocorrelation or clustering of geographical data. It was originally proposed for summarizing the geographical patterns of cancer data in Scotland (IARC 1985). In this paper, we investigate the power of the rank adjacency statistic to detect spatial clustering when a small number of regions is involved. The investigations were carried out using Monte Carlo simulations, which involved generating patterned/clustered values and computing the power with which the D statistic would detect it. To investigate the effects of region shapes, structure of the regions, and definition of weights, simulations were carried out using two different region shapes, binary and nonhinary weights, and three different lattice structures. The results indicate that in the typical example of considering Canadian total mortality at the electoral district level, the D statistic had adequate power to detect general spatial autocorrelation in twenty‐five or more regions. There was an inverse relationship between power and the level of connectedness of the regions, which depends on the weighting function, shape, and arrangement of the regions. The power of the D statistic was also found to compare favorably with that of Moran's I statistic.  相似文献   

12.
Abstract

The energy policy in Germany encourages an ever-greater utilization of biomass to produce biogas. But this utilization interferes on the natural resources and affects new conflicts regarding other forms of land use particularly flood prevention measures, drinking water supply and recreation. A forward-looking planning is needed to minimize these conflicts. Hence, this paper aims to derive quality and protection standards, summarized in checklists, assessing the effectiveness of different planning instruments with respect to the impact of biogas production in practice. These checklists were used in four model districts in Lower Saxony to evaluate the effectiveness of planning instruments on the regional level. The results show that the investigated Regional Planning Programmes do not contain any explicit planning statements as to the production of biomass or biogas. Specific regulations regarding potential conflict situations are mainly to be found in the respective Protected Area Regulations. However, generally the German spatial planning and sectoral planning provide options to control the production of biogas in a way that it is compatible with the majority of competing land uses.  相似文献   

13.
管窥张闻天从个体农业经新民主主义走向社会主义的构想   总被引:1,自引:0,他引:1  
张闻天关于农村合作经济的思想是他为我们党留下的精神遗产的一部分。张闻天所说的供销合作社与生产合作社 ,是以私有制为基础的各种类型的劳动互助组织 ,发展供销合作社与劳动互助组织 ,为农业集体化准备条件 ,经过长期的说服教育 ,在经济上必须实行一条无产阶级的领导路线 ,以最终引导农民走向社会主义。搞新民主主义建设 ,张闻天提出发展合作社的道路 ,是从供销合作到生产合作。在这条道路中 ,发展农村供销合作社占有重要的地位和作用。供销合作社是把小生产者与国营经济结合起来的桥梁和纽带 ,担负着改造小生产者社会制度的历史任务。需要坚持自愿互利原则 ,反对强迫命令 ;保护农民的私有权 ;正确处理和资本主义的关系  相似文献   

14.
The mega-urbanisation process in Java is reflected in the spatial patterns of urban population growth between 2000 and 2010, although there has been a small deceleration in the rate of growth recently. This process is also clearly indicated in the significant increase in the number of urban localities, which reflects in situ urbanisation and rural–urban transformation in Java. Most districts and cities located adjacent to large cities experienced much higher population growth rates, compared to the core areas in cities. The formation of urban belts with a mix of economic activities connecting large cities is greatly expanding, while the small and medium cities, those with population sizes between 100,000 to one million, have tended to stagnate as their role and functions as centres of socio-economic activities are taken over by the large cities. Java’s mega-urbanisation appears unstoppable, and is largely uncontrolled at the present time. It is a daunting challenge for the central and local governments to manage the spatial urban growth in Java in the near future.  相似文献   

15.
This paper explores how territorial economic governance is discursively constituted in a globalising and neoliberalising world. It acknowledges both the increasingly recognised formative role of spatial imaginaries in economic interventions and the workings of co‐constitutive political projects that link particular imaginaries with political ambitions and policy strategies. Embracing recent calls for comparative ethnographic urban research at the local‐global interface, it explores currently dominant spatial imaginaries across the four Australasian cities of Auckland, Sydney, Melbourne, and Perth. Based on multiple qualitative methods, this study claims that a considerable number of actor's spatial associations and reference points can be related to particular city‐specific governmental projects; Auckland's Super‐City, Sydney's Global and Green City, Melbourne's Liveable City, and Perth's Vibrant City. It is demonstrated how discursive governance techniques such as ‘story‐telling’, benchmarking, and policy transfer have been pivotal in the activation, circulation, and performance of those spatial imaginaries and their transformation into temporarily dominant visions for strategic urban interventions aimed at repositioning urban actors, spaces, and activities. While spatial imaginaries can be related to differently framed global aspirations, the effects of spatial political projects on urban governance and investment trajectories differ significantly across space. Theoretically, the paper stresses the importance of particular conceptions of territorial relations and time‐ and place‐specific institutional mediation in shaping context‐dependent discursive material governance alignments.  相似文献   

16.
Abstract

More than 12,000 years of cultural adaptation and change in the southwestern Great Lakes preceded the period of Removal that is the focus of this volume. Strategies for economic risk management, patterns of group interaction, and dynamics of group identity in play during the Removal period were developed over the long expanse of prehistory and early history. In this paper we provide an overview of these cultural developments, and offer a deep-time perspective of traditional cultural patterns leading to the specific Removal period case studies presented.  相似文献   

17.
初级农业生产合作社的收益分配是全面体现合作社性质和优越性的重要标志。合作化时期,西南地区根据中央有关初级社收益分配的指示精神和多民族地区的实际,坚持少取多分、按劳取酬和民族团结的原则,正确地处理社与社员之间的关系,努力提高劳动分配在初级社收益分配中的比例,推动互助合作运动的进一步发展。土地和劳动分配比例确立过程及其变动趋势决定着初级社生产发展的规模和方向,对于深入认识合作化的进程具有相当重要的意义。  相似文献   

18.
ABSTRACT

The interpretative power of quantitative intra-site spatial analysis has long been recognised by archaeologists. On the contrary, very few ethnoarchaeological works have engaged with the statistical analysis of intra-site pattern of artefacts and ecofacts. Nonetheless, ethnoarchaeology is uniquely placed to guide and assist in the identification of sound techniques and in the development of the methodology of analysis. The possibility to directly connect the distribution of the proxies under study with the activity that generated such distribution, provide the means of fine-tuning the tools we use for identifying these patterns in the archaeological record. As a consequence, archaeological methodology and interpretation both benefit from the application of improved methodologies. In this paper we review some of the most common techniques used to analyse activity areas and we provide examples of the application of such techniques to ethnoarchaeological contexts. The aim is to assess how archaeology can benefit from the intra-site spatial analysis of ethnoarchaeological contexts.  相似文献   

19.
This paper attempts to further the research by Odland and Ellis (1992) in applying event history methodology to the analysis of spatial point patterns (that is, event patterns). Its empirical focus is the event pattern derived from the adoption of an agricultural innovation, the Harvestore, in southern Ontario, Canada, from 1963 to 1986. Event history analysis involves the use of discrete-state, continuous-time stochastic models to investigate a temporal longitudinal record on discrete variables. Event history models are usually concerned with durations of time between events and the effects of intertemporal time dependencies on future event occurrences. As such, they are often referred to as duration models. Many of the methods used in event history analysis allow the use of other nonnegative interval measurements in place of standard temporal intervals to investigate a series of events. In particular, spatial intervals (or durations) of distances between events may also be accommodated by event history models. Our analysis extends the previous research of Odland and Ellis (1992) by using a wider range of parametric models to explore duration dependence, investigating the role of spatial censoring, and using a more extensive set of explanatory variables. In addition, simulation experiments and graphical tests are used to evaluate the empirical event pattern against one generated from Complete Spatial Randomness. Results indicate that the event pattern formed by the Harvestore adopter farms is clustered (that is, is described by positive duration dependency), the sales agent is a significant factor in the distribution of adopters, and that contrasting results are obtained from the analysis using censored data versus uncensored data.  相似文献   

20.
The spatial dimension of law is a neglected field of study. This article responds to suggestions that have been made to develop a ‘geography of law’, and investigates expressions of State‐centred law regarding common pool natural resources. It asks how variations in law between lower‐level territorial units are to be explained in situations where patterns of resource exploitation are similar and the overarching State proclaims an even approach. To explore these issues, the article focuses on a case study of Tamil Nadu marine fisheries. Comparing the reality of State regulation in different coastal districts, the author argues that the State occupies a relatively weak position vis‐à‐vis user groups, and strives to maximize its legitimacy by adapting to local political circumstances. The end result is a legal patchwork with strong spatial connotations.  相似文献   

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