Quantifying the Spatiotemporal Dynamics of Industrial Land Uses through Mining Free Access Social Datasets in the Mega Hangzhou Bay Region, China

Lingyan Huang,Jing Zhang,Jingsong Deng,Xinyu Zheng,Amirreza Shahtahmassebi,Muye Gan,Yani Wu,Qing Zheng,Jihua Wang,Qiming Zheng,Ke Wang

doi:10.3390/su10103463

Abstract

China has experienced rapid industrial growth over the last three decades, leading to diverse social and environmental issues. In the new industrialization era, it is urgent to quantify industrial land use (ILU) dynamics for sustainable industrial management, yet there have been limited attempts to systematically quantify these changes, especially in large-scale areas. Through points-of-interest (POIs), a free access geospatial big data, we developed a new framework for exploring ILU dynamics in the mega Hangzhou Bay region (MHBR). The ILU was identified by using natural language processing to mine the semantic information of industrial POIs from 2005, 2011, and 2016. Then, a two-step approach that integrated statistical analysis and hotspots detection was introduced to quantify the changes. The results revealed that traditional industries such as textile products and apparel manufacturing, unspecific equipment manufacturing, and electrical machinery and components manufacturing were dominant types across MHBR, with the enterprise number reaching 14,543, 9412, and 4374, respectively, in 2016. The growth rates of these traditional industries dropped during 2011–2016, while the growth rates of new industries such as Internet information industry and logistics industry increased remarkably, particularly in Hangzhou and Ningbo. Additionally, traditional industrial factories mainly expanded in the urban periphery and coastal zones, whereas new industries mainly grew in the urban center. Shrinkages in the hotspots of traditional industries between 2011 and 2016 were also observed. Our study provides a detailed spatial view of ILU, indicating that MHBR has undergone an industrial transition from traditional industry to new industry.

Highlights

China has undergone a spectacular industrial boom along with huge industrial land expansion under persistent structural reform since 1978
The results revealed that traditional industries such as textile products and apparel manufacturing, unspecific equipment manufacturing, and electrical machinery and components manufacturing were dominant types across mega Hangzhou Bay region (MHBR), with the enterprise number reaching 14,543, 9412, and 4374, respectively, in 2016
The two-step approach that combined statistical analysis and hotspots detection enabled us to gain an in-depth understanding of how the size of different industrial land use (ILU) has changed, and where different ILU have expanded or regenerated

Summary

Introduction

China has undergone a spectacular industrial boom along with huge industrial land expansion under persistent structural reform since 1978. Due to inefficient supervision, industrial land is generally used inefficiently in China [3,4]. Industrial land occupies more than 20% of the built-up land, the ratio is far beyond that of many developed countries, indicting the gap between China and developed countries [5]. In some developed areas of China, such as Shanghai and Zhejiang, the percentages of the industrial land to the total built-up, are as high as 26.5% and 24.1% [6]. Industrial emissions from some traditional heavy industries, for example, petrochemical industries and metallurgical industries, have threatened the urban soil [7] and atmosphere [8], as well as the watershed [9]. Excessive inputs of synthetic chemicals and heavy metals may be attributed to potential human health risks [10]

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