文章基本信息

标题：THE TYPOLOGY OF THE WORLD’S MACRO-REGIONS.
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作者：IMEN GUECHI ; HALIMA GHERRAZ ; DJAMEL ALKAMA 等
期刊名称：Revue Roumaine de Géographie
印刷版ISSN：1220-5311
出版年度：2021
卷号：65
期号：2
页码：203-222
语种：English
出版社：Editura Academiei Romane
摘要：Urbanization is a phenomenon that is driven by humans. It has significantly influenced biodiversity, ecosystem processes and regional climate. Like all medium-sized cities in Algeria, Guelma is affected by the rapid and massive urban growth which has increased the land use/land cover (LULC) changes. Thus, it generates climate change. This work explores the relationship between the LULC characteristic and LST, based on remote sensing & GIS. A time-series of Landsat images TM, ETM+ and OLI/TIRS data and various geospatial approaches as well as the urban – rural gradient, multi-buffer ring, statistics and the techniques used in urban landscape metrics were used in order to facilitate the analysis. The findings have revealed that urban/built-up areas of Guelma city have increased by 12%. However, the agricultural and forest areas have witnessed a reduction of 15% and 3%. The average temperature of the urban setting was 38.27 C° in 1986, whereas in 2019 it reached 41.90 C°. When the average temperature values for every class were calculated, it was observed that the lowest values were in forest bodies with 27.26 C° in 1986 and 37.78 C° in 2019. There is a possible rise in LST over time scale owing to the substitution of green cover by urban soil areas. For instance, there was a noticeable increase of 3.65°C in mean LST for urban areas. The increased urban LST values are due to the broad region, the low fragmentation degree of landscape and complex outlines, which in turn lead to reduced forest LST values. In comparison to the LST of the sprawl form, the LST of compact form is low. This investigation provides us with clear understanding of the impact that the urbanization, composition and form of landscape has on LST. These findings have significant theoretical and managerial implications.
关键词：Guelma city;urbanization;landscape;Multi-Buffer Ring;LST;remote sensing & GIS