Abstract

Coastal landscapes are facing a huge challenge to manage the spatial extension of their built-up area at the expense of the reduction of natural and cultivated areas. This is the case of Hergla city, located in the southern part of Hammamet Gulf, Tunisia. This paper firstly highlights changes of LULC in Hergla city, between 2007 and 2017 using a supervised classification of Landsat images. The evolution of built-up area between 2002 and 2020 is examined expending Google Earth images. Lastly, the geolocalization of green spaces are provided. Then, the superposition of all these analyzes will be used to propose a landscaping for a better human well-being. Finally, this research indicates the importance of analyzing LULC change at multiple scales; it revealed that built-up area has been increased and olive fields reduced from 64 % in 2007 to 30.2 %in 2017. It shows, too, an important urban expansion from 39.9 Ha in 2002 to 48.3 Ha in 2020. However, the green spaces are concentrated in the North and middle part of the city and a proposal for the development of an urban park on the south side will help to balance the spatial distribution of green spaces in this area and ensure better human well-being.

Highlights

  • The green spaces are concentrated in the North and middle part of the city and a proposal for the development of an urban park on the south side will help to balance the spatial distribution of green spaces in this area and ensure better human well-being

  • Urban sprawl represents the extent of urbanization, which is a global phenomenon mainly driven by population growth and large-scale migration [1]

  • [19] involved that urban mutations led to the fragmentation of landscapes and the degradation of living environment in Hergla city, which is one of the coastal cities marked by its significant urban extension [20], [21] has underlined profound transformations in the city, in 2018.To more asses and update this evolution in Hergla city different objectives were assigned in this paper: a) to understand LULC changes between 2007 to 2017 using Landsat images, b) to assess the extent of built-up land cover in the Hergla city, over the period 2002 to 2020 using a Google Earth Time Series Images, c) to geolocate the green spaces of the city and d) to propose the management of an urban park

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Summary

Introduction

Urban sprawl represents the extent of urbanization, which is a global phenomenon mainly driven by population growth and large-scale migration [1] It is, an increase of the population living in cities, the level of non-agricultural employment or production, the pace of resource use, or the presence of traffic saturation [2].The [3] admitted that by 2050, 66% of the world’s population will be living in urban areas, because it has been expanded rapidly from 746 million in 1950 to 3.9 billion in 2014 [4]. In developing countries the speed and scale of urbanization can result in unsustainable settlements which generate ecosystem pression [5], [6] In this situation, [7] predicted that cities become unable to compete in a globalized environment. [19] involved that urban mutations led to the fragmentation of landscapes and the degradation of living environment in Hergla city, which is one of the coastal cities marked by its significant urban extension [20], [21] has underlined profound transformations in the city, in 2018.To more asses and update this evolution in Hergla city different objectives were assigned in this paper: a) to understand LULC changes between 2007 to 2017 using Landsat images, b) to assess the extent of built-up land cover in the Hergla city, over the period 2002 to 2020 using a Google Earth Time Series Images, c) to geolocate the green spaces of the city and d) to propose the management of an urban park

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