Analyzing urban sprawl patterns through fractal geometry: the case of Istanbul metropolitan area

Over the last decade, there has been a rapid increase in the amount of literature on the measurement of urban sprawl. Density gradients, sprawl indexes which are based on a series of measurable indicators and certain simulation techniques are some quantitative approaches used in previous studies. Recently, fractal analysis has been used in analyzing urban areas and a fractal theory of cities has been proposed. This study attempts to measure urban sprawl using a sprawl index and analyses urban form through fractal analysis for characterizing urban sprawl in Istanbul which has not been measured or characterized yet. In this study, measures of sprawl were calculated at each neighborhood level and then integrated within sprawl index through “density” and “proximity” factors. This identifies the pattern of urban sprawl during six periods from 1975 to 2005, and then the urban form of Istanbul is quantified through fractal analysis in given periods in the context of sprawl dynamics. Our findings suggest that the fractal dimension of urban form is positively correlated with the urban sprawl index score when urban growth pattern is more likely “concentrated”. However, a negative relationship has been observed between fractal dimension and sprawl index score when the urban growth pattern changes from the concentrated to the semi-linear form

Dynamics of urban sprawl

This paper introduces a framework for understanding the dynamics of urban growth,particularly the continuing problem of urban sprawl. The models we present are based on transitions from vacant land to established development. We propose that the essential mechanism of transition is analogous to the way an epidemic is generated within a susceptible population, with waves of development being generated from the conversion of available land to new development and redevelopment through the aging process. We first outline the standard aggregate model in differential equation form, showing how different variants (including logistic, exponential, predator-prey models) can be derived for various urban growth situations. We then generalize the model to a spatial system and show how sprawl can be conceived as a process of both interaction/reaction and diffusion. We operationalize the model as a cellular automata (CA) which implies that diffusion is entirely local, and we then illustrate how waves of development and redevelopment characterizing both sprawl and aging of the existing urban stock, can be simulated.Finally we show how the model can be adapted to a real urban situation - the AnnArbor area in Eastern Michigan - where we demonstrate how waves of development are absorbed and modified by particular historical contingencies associated with the re-existing urban structure

Urban Sprawl and Farmland Prices

A theoretical model of farmland valuation is developed that allows urban sprawl to affect farmland values through the conversion of farmland to urban uses, shifts in production to higher-valued crops, and the speculative effect of urban pressure on farmland values. This model is estimated using county level data in the continental United States. Evidence is found for all three effects of urban sprawl on farmland values, with a significant contribution of urban pressure on net agricultural returns around major urban centers. Ancillary evidence supports that the latter effect is attributable to shifts to high-valued crops.hedonic determinants, land prices, spatial productivity, urban sprawl, Land Economics/Use, R14, Q15, D24, C33,

URBAN SPRAWL AND OBESITY

In the U.S., urban sprawl and the rise in obesity rates have been two powerful trends during the latter half of the 20th century. Previous empirical work has found that obesity rates are influenced by labor market outcomes that are fundamentally shaped by the spatial pattern of developed land. We examine these potential linkages in an urban spatial model augmented to include time allocation and weight. Residents maximize utility defined over housing, weight, and food subject to a fixed time budget allocated to commuting, calorie expenditure, and work. We examine how weight is affected by commuting distance, food prices, and the rate of calorie expenditure; how a reduction in transportation costs affects weight throughout the city; and how initial weight affects location decisions. We identify, and explore the significance of, the conditions under which weight gain is associated with common features of sprawl.Food Consumption/Nutrition/Food Safety,

Unearthing the roots of urban sprawl: a critical analysis of form, function and methodology

Urban sprawl is one of the key issues facing cities today. There is a large volume of literature on the topic but despite this there is little agreement as to its characteristics and effects. The paper discusses some of the most contested issues of urban sprawl. It looks at the various definitions of sprawl; examines the effects of sprawl, assessing these in relation to planning and market led approaches; and discusses methodological approaches relating to measures of sprawl in terms of its impacts and forms

Karakteristik Pemekaran Kota Bogor Dan Evaluasinya Terhadap Pola Ruang

The rising of activities and population growth in Bogor City, are major causes of increased need for land. In order to provide the land, city will tend to spread into areas. This sprending called urban sprawl. This study aims to: (1) determine the urban sprawl characteristics (level, direction and type of urban sprawl) of Bogor City during 2005-2014 and 2) evaluate the suistability between landuse and regional spatial planning in 2014. The secondary data was used to analysis spatial built up areas and survey. Survey method using purphosive sampling. Analysis method using spatial analysis overlay, to get spatial built up areas deviation. Bogor City characteristics of urban sprawl during 2005-214 showed that 35 villages have a vey low-level of urban sprawl, 27 village has a low-level of urban sprawl, 2 villages have a middle-level of urban sprawl, 3 villages have a high-level of urban sprawl and 1 village has a very high-level of urban sprawl. The type of urban sprawl is ribbon development along the main road. Development of built up area during 2005-2014 leads to the south (31.06%) and north (28.62%). Bogor city landuse in 2014 covering 6382,56 Ha (54.50% ) has suitability with regional spatial planning. Land use covering 4.330,57 Ha (36,93 %) has not been realized and land use covering 1.003,86 Ha (8,57%) has unsuitability with regional spatial planning. Class Domination unsuitability is medium-density settlement that located in the low-density settlement of 162.02 ha (16.14%)

Urban sprawl in Iranian cities and its differences with the western sprawl

Recently a number of studies have focused on urban sprawl in the Iranian cities and the negative impacts of such development pattern. Although in a general view the phrase “urban sprawl” is used for fast and sometimes uncontrolled urbanizations, but there are dissimilarities between the urban sprawl in the western societies with the so-called Iranian urban sprawl. This paper discusses these differences as part of five main aspects that are mentioned in the internationally recognized urban sprawl definitions. Suburban sprawl, single-use developments/zoning, disconnected street network, low accessibility of the new developments, and commercial strip development are the aspects that are descriptively discussed as the main differences between the two types of sprawl. The main point of the discussion is that due to the wide range of similarities, which are briefly introduced, the type of the fast outward urban growth that is observed in the periphery of the Iranian cities can be defined as a part of the universal urban sprawl trend. Finally a definition is suggested for explaining urban sprawl in Iran

Controlling urban sprawl in the Las Vegas Valley through a mixed use zoning strategy

Urban sprawl is one of the biggest issues facing communities throughout the country today. Urban sprawl is defined as a detrimental form of growth that occurs on the fringe of communities. Most urban areas in the United States are affected by this type of growth; This thesis will address the problems of urban sprawl within the Las Vegas Valley. It documents the effects of urban sprawl on the Valley\u27s infrastructure cost, transportation, resource depletion and the environment; Strategies will be offered to control urban sprawl. Mixed use combined with increased land use density will emerge as the proposed solution for addressing the detrimental effects of urban sprawl. The benefits of mixed use as a strategy for controlling urban sprawl will be shown. The thesis demonstrates a way of implementing these strategies within existing Clark County ordinances

Analisis Urban Sprawl sebagai Rekomendasi Pengendalian Pemanfaatan Ruang untuk Pengembangan Lahan Pertanian di Kabupaten Karawang: Urban Sprawl Analysis as a Recommendation of Spatial Utilization Control for Agricultural Land Development in Karawang Regency

The increasing conversion of agricultural land to non-agricultural land is the central issue in Karawang Regency. It is caused by the increasing population, urbanization, industrialization, urban expansion, and its position in the Jakarta Bandung Mega Urban Region (JBMUR) corridor. The increasing need for space in urban areas encourages the development to the city’s outskirts (urban sprawl). Urban sprawl is the biggest challenge in Karawang Regency’s spatial planning. The purpose of this study is to identify the spatial pattern of urban sprawl conditions formed from 2009 until 2018 and projecting urban sprawl in 2018 until 2031 as a recommendation for controlling space use for agricultural land development. The method used is urban sprawl analysis with related research, Moran index autocorrelation analysis and Local Indicator of Spatial Association (LISA), analysis of land use alignment and spatial patterns of spatial plan, and overlays. The results of this study indicate that the spatial distribution of urban sprawl occurs along the Cikampek, Telukjambe Barat, Telukjambe Timur, Pangkalan, and Tegalwaru toll roads. The urban sprawl that occurred in 2009 until 2018 has the type of leapfrog development. There was a change to the kind of urban sprawl to kind of ribbon development and an increase in the urban sprawl of 67.14 km2 in the projected urban sprawl in 2018 until 2031. Land use with conformity is much broader than land use that is not aligned with spatial planning. Therefore, first priority recommendation for agricultural land development still dominates in Karawang Regency