Multi-temporal urban growth analysis with expansion indicators in Lucknow constituency by open-source data, India

IF 3.9 2区 社会学 Q1 URBAN STUDIES Journal of Urban Management Pub Date : 2022-12-01 DOI:10.1016/j.jum.2022.07.001
Ravi Verma, Pradeep Kumar Garg
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引用次数: 1

Abstract

Urban sprawl in metropolitan cities of India is a distressing concern for planners. Not only, it is underachieved but it is neglected. This study attempts to help in understanding the gap by studying urban sprawl in 5 assembly constituencies (ACs) of Lucknow city of India, through urban growth indicators such as urban growth types (Infilling, Edge-expansion and outlying), Shannon’s Entropy value and Landscape metrics (Complexity, Compactness, Centrality and Porosity). Results for these 5 ​ACs namely Cantonment (Cantt.), Lucknow Central (LC), Lucknow East (LE), Lucknow North (LN) and Lucknow West (LW) show that constituency has gone under a large amount of urban growth since 1985 to 2015. Amount of edge expansion in 2005–2015 is decreasing from previous duration of changes in year 1985–1995 and 1995–2005. Outlying growth of built-up area shown by formation of new patches is resulting in increase of 122.69 km2 area in Built-up from 1985 to 2015, which was at first cycle (1985–1995) caused by decrease in Other and Vegetation Land Use (LU) class but after that in 1995–2005 and 2005–2015, it is mainly due to decrease in Agricultural land. Among Landscape metrics, NP (Number of Patches) and LSI (Landscape Shape Index) show upward trend from 1985 to 2015 indicating increase in compactness and complexity of patches of Built-up but ENN_MN (Mean Euclidean Nearest neighbor Distance) and AI (Aggregation Index) show either constant or negative trend. Shannon’s entropy value Hn for every year is close to loge(n) and also in increasing manner, depicting increase in Built-up area dispersion.

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印度勒克瑙选区通过开源数据进行的具有扩张指标的多时相城市增长分析
印度大城市的城市扩张是规划者担忧的一个问题。它不仅没有实现,而且被忽视了。本研究试图通过城市增长指标,如城市增长类型(填充、边缘扩张和外围)、香农熵值和景观指标(复杂性、紧凑性、中心性和孔隙度),研究印度勒克瑙市5个选区的城市扩张,以帮助理解这一差距。这5个选区的结果表明,从1985年到2015年,该选区经历了大量的城市增长,即坎特区(Cantt.)、勒克瑙中部(LC)、勒克瑙东部(LE)、勒克瑙北部(LN)和勒克瑙西部(LW)。与1985-1995年和1995-2005年的变化持续时间相比,2005-2015年的边缘扩展量正在减少。1985 - 2015年,以新斑块的形成为特征的建成区外围增长导致建成区面积增加122.69 km2,在第一个周期(1985 - 1995年),这是由于其他和植被类土地利用(LU)类型的减少造成的,而在1995-2005年和2005-2015年之后,主要是由于农用地的减少。在景观指标中,NP(斑块数)和LSI(景观形状指数)在1985 - 2015年间呈上升趋势,表明斑块的紧凑性和复杂性有所增加,而ENN_MN(平均欧几里得最近邻距离)和AI(聚集指数)呈不变或负变化趋势。每年的Shannon熵值Hn接近于loge(n),且呈递增趋势,说明建成区弥散度增大。
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来源期刊
CiteScore
9.50
自引率
4.90%
发文量
45
审稿时长
65 days
期刊介绍: Journal of Urban Management (JUM) is the Official Journal of Zhejiang University and the Chinese Association of Urban Management, an international, peer-reviewed open access journal covering planning, administering, regulating, and governing urban complexity. JUM has its two-fold aims set to integrate the studies across fields in urban planning and management, as well as to provide a more holistic perspective on problem solving. 1) Explore innovative management skills for taming thorny problems that arise with global urbanization 2) Provide a platform to deal with urban affairs whose solutions must be looked at from an interdisciplinary perspective.
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