Mixed-use ‘regeneration’ of employment land in the post-industrial city: challenges and realities in London

This article explores the relationships between land-use planning, property and economic development, with a focus on the changing attitudes towards employment land in post-industrial cities. Drawing on case study data from two London local authorities, it finds that planning authorities are moving away from protecting employment land to actively promoting the mixed-use redevelopment of employment sites, even when there are thriving businesses on these sites and a shortage of supply of employment premises and land, relative to demand. We examine the drivers for changing policy including the national and regional policy contexts, housing targets, the influence of austerity measures, rise of Neighbourhood Planning and changing conceptions of regeneration and the role of housing therein. The article highlights the complex task faced by local planners and the tensions involved in simultaneously finding sites for housing, fostering economic development and promoting mixed-use redevelopment in planning policy and decisions. We find that changes in policy are fuelling speculation for housing development on sites occupied by viable businesses, supporting rather than responding to deindustrialization. This is leading to a gap between aspirations for delivering mixed-use environments on hitherto employment sites and realities on the ground.     

陕西省农村土地流转迟缓的供求影响因素与机制探析

农村土地流转长期受到决策者的鼓励,但我国农村土地使用权流转率一直偏低,西部地区尤其如此。本文试图以陕西省为例,通过问卷调查和访谈,分析农地社会保障功能等因素影响农地使用权流转率的作用机制;并从供给和需求两个方面,分析了经济落后地区农村土地使用权流转率偏低的原因。研究结果表明,农地流转受到现行的以提供社会保障为基本目的的农地制度的约束,任何旨在提高农地流转率的改革措施,都必须考虑现行农地制度的社会保障功能和地区差异,实行因地制宜的农地流转制度。     

GIS辅助城市用地结构分析与用地调整的应用初探

面对复杂的城市问题,单一学科的理论和方法往往束手无策,交叉学科的研究是近年来城市问题研究的主要趋势之一,特别是随着GIS的发展,借助GIS及相关学科的研究方法和手段进行城市现状分析和预测将是城市学领域发展的重要方向之一。本文以湖北省崇阳县白霓镇为例,借用经济学供需基本概蓬和分析方法,结合社会学的调查研究方法,利用系统工程方法和GIS技术,在深入调查的基础上,开创性地提出城市用地供需度的概念,并从它们与区位之间关系的角度出发分析用地结构,探讨了GIS在城市用地结构分析与辅助用地调整方面的应用,旨在抛砖引玉,引起同行们对新技术条件下传统研究方法革新的重视。     

FEEDBACK BETWEEN REAL ESTATE AND URBAN ECONOMICS*

ABSTRACT This paper considers the implications of increasing land supply constraints in the United States on urban demand. First, because shifts in demand are now capitalized more into the price of land, house prices in some metropolitan areas have grown increasingly unaffordable to typical households. This might have an effect on the fundamental character of such cities. Second, the effect of home owners’ financial interests as landowners on their decisions about what regulations or investments in their communities to support may become stronger. Third, researchers may now be able to better use land prices to make inferences about urban demand. However, interpreting real estate prices still is tricky.     

Artificial Scarcity in Housebuilding and the Impact on Affordability: The Return of Absolute Rent

The slow response of volume housebuilders to changes in demand has been cited as a contributing cause of a global crisis of housing affordability and allegations of land banking have persistently dogged the industry. This article reviews the supply responsiveness of speculative housebuilders in the United Kingdom and Australia through the neglected Marxian analytic category of absolute rent. Absolute rent directs attention to the relationship between the value of land and the cost of housing and models a market in which landowners may withdraw land from supply to inflate prices. Through the lens of absolute rent, the real estate practices of the housebuilding industry can be understood as a strategy of artificial scarcity straddling land and housing markets. The findings of this investigation demonstrate the insights to be gained by a return to absolute rent that valuably expand the current debate on the supply and cost of housing.     

The stubborn persistence of local land use powers: a comment on Morrill

Contrary to Professor Morrill's thesis, land use powers in the United States are not centralizing in the hands of regional and national elites favoring metropolitan consumption interests. Indeed, the article cites evidence that land use powers have decentralized since the 1970s. The white middle and upper classes, concentrated in suburban residential enclaves, are well-served by decentralized land-use controls. Morrill is right to be concerned about threats to local democracy in the United States. But his suggested solution, leaving local governments alone to set land use policies, is flawed. Regional land use planning, does not necessarily reduce local liberty but could enhance it by dampening the beggar-thy-neighbor chase for tax ratables and enhancing the residential choices of low-income, as well as minority, households.     

石河子市土地利用变化及主要地类驱动力研究

通过分析石河子市土地利用的变化,探讨了其土地利用总体变化和各主要地类的驱动机制。社会经济因素是该区域土地利用总体变化的主导性驱动因素。而人口和经济增长是石河子市土地利用总体变化的首要社会经济类驱动因子,其次农业是技术发展。农业结构调整、产业结构转移是耕地利用变化的主导性驱动因素,而城镇化和工业化发展则是引起建设用地变化的主导性驱动因素。     

Identifying the Impacts of Land-Use Spatial Patterns on Street-Network Accessibility Using Geospatial Methods

While the land use-street network nexus is well acknowledged, evidence for the one-way impacts of land-use patterns on street accessibility is still inadequate. The measurements of land-use patterns and street accessibility lack systematic knowledge. Their empirical correlations also lack geographical variability, constraining site-specific land-use practices. Therefore, this study overcame the aforementioned limitations by examining the two-level spatial models to formulate accessibility-oriented land plans, using a well-developed Chinese city as an example. Firstly, two landscape metrics—Euclidean Nearest-Neighbor Distance (ENN) and Similarity Index (SIMI)—were used to quantify the intra- and inter-land-use configurations, respectively. Both city-level and local accessibility were measured using spatial design network analysis. Performing both ordinary least squares (OLS) and geographically weighted regression (GWR) models, results identified the statistically significant effects of inter-land-use patterns on two-level street accessibility. An exception was that land-use configurations within residential and industrial regions were irrelevant to street accessibility. We also found GWR was a better-fitting model than OLS when estimating locally-varied accessibility, suggesting hierarchical multiscale land-use planning. Overall, locally heterogeneous evidence in this study can substantialize land use-street network interactions and support the decision-making and implementation of place-specific accessibility-oriented land use.     

Approach to Trading Off Economic and Environmental Values in Industrial Land-Use Planning

Few contemporary issues have received as much sustained attention as the deterioration of the quality of our natural environment and, particularly, the need to manage the trade-off between economic growth and the quality of that environment. This paper discusses research currently under way to develop a land-use planning methodology that will help planners address the trade-offs between environmental quality and economic development. The methodology is used to evaluate the social, economic, and environmental impact of alternative land-use plans. The methodology consists of a regional analysis submodel and a site analysis submodel. The first component is based on an expanded input-output analysis incorporating land use, resource inputs, and waste-emission outputs. The second component is an empirical analysis based on the specific suitability and compatibility of proposed land-use development packages. The land-use planning model developed is applied to a case-study area centered on Charleston, South Carolina.     

城乡土地利用结构合理性评判研究——以舟山市定海区为例

根据舟山市定海区社会、经济和生态发展的多重要求,基于多目标规划方法和灰色关联技术对该区在1996-2004年间城乡土地利用结构合理性进行了定量评判。研究表明:①舟山市定海区城乡土地利用结构合理性程度总体不高,但随着时间推移逐渐趋向合理;②定海区城乡土地不同用地类型与目标值的贴近程度存在很大差异,揭示出不同用地类型的调整空间差别明显;③与整个上升趋势相比较,1998年间的土地利用合理性程度突然下降,反映出自然灾害对舟山市定海区城乡土地利用结构的影响依然十分显著。     

南京大学土地利用学科发展回顾与展望

南京大学是国内较早开展土地利用研究的高校之一。1949年后特别是改革开放以来,南京大学土地利用学科取得了突飞猛进的发展,目前已形成了一个相对完整的跨学科发展体系。经过长期的研究凝练,学科目前已逐步形成了"土地利用与规划"、"土地经济与政策"、"土地评价与整治"三个重点研究领域,并在"城市土地利用管理"和"农户土地利用行为"等方面形成了一定的研究特色。今后,南京大学将围绕"全面实现国内一流优势学科,达到国际同类研究一流水平"的目标,通过凝聚力量争取重大科研项目,引进或培养领军人物,加强重点实验室建设等战略举措,建成与国际接轨的具有南京大学特色的土地利用学科体系。     

国外土地利用规划发展与借鉴

世界各国在社会制度、土地资源禀赋、经济水平和发展历史等方面都存在着差异,土地利用规划并没有统一的模式。所以学习国外经验,了解国外模式是非常重要的。通过大量文献综述,阐述了联合国粮农组织(FAO)、俄罗斯、美国、德国、英国、日本等国家土地利用规划体系、内容概况,对这些国家土地利用规划编制和实施的新理念、技术、方法的共同特点及发展趋势进行了分析比较和归纳总结。在此基础上,指出国外土地利用规划经验对我国规划借鉴的七个方面,以期为我国新一轮土地利用规划的修编提供积极的借鉴。     

略论产业结构优化与土地利用结构调整

产业发展水平和产业结构决定着土地利用方式与结构。土地利用结构调整必须以产业结构优化为前提。按照产业发展序列调整土地资源在国民经济各部门中的分配,提高土地利用率和利用效益,合理利用土地,是土地利用结构调整的方向。     

Lights and Shadows of Urban Water Demand Management: The Case of the Metropolitan Region of Barcelona

The economic, social, and environmental limits of supplying water to metropolitan areas through conventional means (reservoirs, water transfers, etc.) have resulted in growing consideration of demand management actions as well as in the use of non-conventional sources of supply. In terms of demand management, economic instruments (pricing and taxes), domestic water-saving technologies, and educational campaigns to encourage water saving during periods of drought have received special attention. While demand management policies have an effect on conserving water and therefore should be welcome, they present problems and uncertainties as well. Using the example of the metropolitan region of Barcelona, in this article I argue that water demand management policies may be insufficient for reaching their ultimate goal of controlled water consumption when confronted with structural changes in urban development such as the expansion of low-density growth, the multiplication of the number of households, or gains in income, all of which lead to a potentially greater demand for water. This calls for more integration of water policies with land use and urban development policies.     

城市土地利用结构的熵值定律

根据对郑州、广州等城市的土地结构分析,总结出关于城市土地利用的信息熵值规律:大城市用地结构的信息熵一般大于小城市的信息熵,综合性城市的信息熵严格大于专业化城市的信息熵,城市化地区的信息熵必须大于各功能区的信息熵。基于信息熵值规律,提出了关于城市空间形态的分维包容原理:城市化地区土地形态的分形维数必须大于各类型土地空间分布的分形维数。     

20世纪50年代初期长江中下游地区乡村劳动力市场探微

从土改结束到集体化高潮前,从土地均分造成的土地和劳动力等生产要素的非均衡配置、农业生产的季节性特征以及国家政策的影响等这些劳动力市场的供给、需求因素来看,当时的确存在着一个广大的乡村劳动力市场——雇佣市场。与土改前不同的是,尽管这一时期雇工农户的数量较多、比重较大,但单位农户的雇工数量却很少。在雇佣形式上,长工数量、佣期急剧下降和短工数量显著增加是这段时期的一大特点。从阶层构成来看,雇佣关系主要发生在普通劳动者之间,并且雇工工资的涨落主要取决于各地乡村的劳动力实际供给和需求状况。     

Iran’s Socio-economic Drought: Challenges of a Water-Bankrupt Nation

Iran is currently experiencing serious water problems. Frequent droughts coupled with over-abstraction of surface and groundwater through a large network of hydraulic infrastructure and deep wells have escalated the nation’s water situation to a critical level. This is evidenced by drying lakes, rivers and wetlands, declining groundwater levels, land subsidence, water quality degradation, soil erosion, desertification and more frequent dust storms. This paper overviews the major drivers of Iran’s water problems. It is argued that while climatic changes and economic sanctions are commonly blamed as the main drivers of water problems, Iran is mainly suffering from a socio-economic drought—i.e. “water bankruptcy,” where water demand exceeds the natural water supply. In theory, this problem can be resolved by re-establishing the balance between water supply and demand through developing additional sources of water supply and implementing aggressive water demand reduction plans. Nevertheless, the current structure of the water governance system in Iran and the absence of a comprehensive understanding of the root causes of the problem leave minimal hope of developing sustainable solutions to Iran’s unprecedented water problems.     

Changes in Land-Use Preferences of Small-, Medium- and Large-Scale Industries Located in Metropolitan Areas (Case Study in Istanbul)

In metropolitan areas, the changing spatial land-use preferences of the industrial sector are the most important determinants in the forming of the macro-form. Metropolitan areas, especially in developing European and Asian countries, become troubled cities with agglomerations of population and investment as a result of failures to apply satisfactory macro-policies and plans throughout the country. Industrial investments on various scales and the land-use preferences of investors have changed over time. The land preferences of production and headquarters of the manufacturing sectors have become basic determinants in the formation of settlement systems due to the transformations that occur alongside technological, economic and social development. This article examines whether or not the basic land-use criterion of the manufacturing sector changes in small-, medium- and large-scale businesses according to their labour structure, defined through an examination of the sectoral structure and relations of scale. Taking the increasing rate of the Gross National Product of the industrial sector in metropolitan areas in every country into account, and examining the land-use preferences of various industrial sub-sectors and scales will serve as an important input when making new planning decisions. The industrial land-use criterion will be effective in the transformation, reorganization or directing of new focuses for the agglomerated industrial structure, especially in Istanbul, which features both Asian and European metropolitan area characteristics. This article will define the existing industrial structure of the Istanbul metropolitan area; and differences between the various scales of land-use preferences within industrial investments will be presented, based on the findings of two investigations carried out over a 5-year period. Several important criteria for industrial investors seeking to establish themselves in metropolitan areas will be determined in the article.     

A simulation model of farming systems and land use in Sweden during the early Iron Age, c. 500 b.c. – a.d. 550

In investigating an area with deserted fields and boundaries in the province of Östergotland, Eastern Middle Sweden, pollen analysis has been used as a tool in describing the ecological base of different phases in the development of the cultural landscape. The characteristics of the early Iron Age expansion have thus been proven to be the simultaneous expansion of cattle breeding and arable farming. This indicates an integrated system, with intensely tilled fields, knowledge of manuring and, therefore, need of a vast fence system to gather the cattle and make efficient use of the manure.Assuming a social organization of families with a size of eight to ten individuals, the amount of land required to feed each unit has been calculated. Three hectares of arable land, 30 ha of meadow land and 30 ha of pasture is suggested as a possible combination to support a family. Using a desk computer, units with these proportions of land have been randomly located in an area of 2 × 2 km² taking soil differences into account. Agrarian units can be located several times at random and the resulting land-use patterns studied. The simulated results often very well describe the actual land-use pattern during the early Iron Age as indicated by deserted fields, boundaries and dwelling sites.     

2018年湖北省旅游供需的空间结构特征分析——以A级景区为例

以湖北省内A级景区和客源地为研究对象,运用数理统计和空间计量方法系统探究旅游供需的空间结构特征.结果表明:①湖北省旅游供需要素具有较强的集聚分布态势,供需状况整体较差且区域差异显著,呈现明显的资源和人口指向性;②客源密集的江汉平原腹地和交通不便、高等级景区稀疏的外围边缘山区供需联系强度较低,高等级景区集聚的区域供需联系...