Information Extraction and Analysis on Temporal and Spatial Pattern Changes of Surfaces Impervious to Water in Shenzhen City During 1979-2020

Yang Liyuan; Chen Yangbo

doi:10.13961/j.cnki.stbctb.2021.05.027

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Information Extraction and Analysis on Temporal and Spatial Pattern Changes of Surfaces Impervious to Water in Shenzhen City During 1979-2020

- Information Extraction and Analysis on Temporal and Spatial Pattern Changes of Surfaces Impervious to Water in Shenzhen City During 1979-2020
- Bulletin of Soiland Water Conservation Vol. 41, Issue 5, Pages: 198-205(2021)
- 作者机构：
  
  中山大学地理科学与规划学院,广东,广州,510275
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.05.027
  CLC： TP79;TU984.16
- Published：2021
- 稿件说明：
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Yang Liyuan, Chen Yangbo. Information Extraction and Analysis on Temporal and Spatial Pattern Changes of Surfaces Impervious to Water in Shenzhen City During 1979-2020[J]. Bulletin of Soiland Water Conservation, 2021, 41(5): 198-205.
DOI：

Yang Liyuan, Chen Yangbo. Information Extraction and Analysis on Temporal and Spatial Pattern Changes of Surfaces Impervious to Water in Shenzhen City During 1979-2020[J]. Bulletin of Soiland Water Conservation, 2021, 41(5): 198-205. DOI： 10.13961/j.cnki.stbctb.2021.05.027.

摘要

[目的] 分析不透水地表比的时空分布，探究城市的发展潜力，为城市水土保持等规划与后续发展提供参考意见。[方法] 以深圳市作为研究区，选取1979—2020年9期共18景Landsat 3/5/7/8影像为主要数据源影像提取不透水面比例作为参考数据，结合不透水面平均中心、标准差椭圆和景观格局指数分析深圳市不透水面时空格局分布。[结果] ①1979—2020年深圳市整体不透水面比例呈增长趋势，1990—2010年增长速率和增长强度最高，后逐渐变缓； ②由于深圳市发展的不平衡，1979—2000年，发展重心持续向着东北方向移动，随后2000—2010年，重心向西北方向迁移，2010年后，重心在东西方向上有所移动。总的来看，深圳市的发展方向主要为东—西； ③景观格局变化显示各等级不透水面景观分布渐趋均衡，分布趋势从破碎到聚集度越来越高，连接性在逐渐增强。[结论] 不透水面增长的不同阶段具有不同的时空分布规律，不同密度不透水面分别有各自的变化特点，降低高密度不透水面的聚集程度对城市未来发展具有积极影响。

Abstract

[Objective] The temporal and spatial distribution of impervious surface ratio was analyzed in order to determine the development potential of the city

in order to provide a reference for urban plannings

such as soil and water conservation

and subsequent development.[Methods] Eighteen Landsat 3/5/7/8 images of Shenzhen City during nine periods from 1979 to 2020 were selected and used to extract the proportion information of impervious surface as the reference data. The spatiotemporal distribution of impervious surface in Shenzhen City was analyzed based on the mean center of impervious surface

standard deviation ellipse

and landscape pattern index.[Results] ① The percentage of impervious surface in Shenzhen City from 1979 to 2020 showed an increasing trend. The rate and intensity of growth was highest from 1990 to 2010

and then gradually slowed. ② Due to the unbalanced development of Shenzhen City

from 1979 to 2000

the development center moved to the northest. From 2000 to 2010

the center moved to the northwest. After 2010

the center moved in the east-west direction. In general

the development direction of Shenzhen City was mainly from east to west. ③ The change of landscape pattern showed that the landscape distribution of impervious surface at different levels was becoming more and more balanced

and the distribution trend gradually moved from fragmentation to higher and higher concentration. Connectivity gradually increased over time.[Conclusion] Different stages of impervious surface growth exhibited different temporal and spatial distribution patterns

and impervious surfaces of different densities had their own characteristics. Reducing the degree of aggregation of high-density impervious surfaces has a positive impact on future development of the city.

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